Series comparison

-[PULL 00/18] riscv-to-apply queue
+[PULL 00/28] riscv-to-apply queue
-From: Alistair Francis <alistair.francis@wdc.com>
+The following changes since commit ad10b4badc1dd5b28305f9b9f1168cf0aa3ae946:
-The following changes since commit c52d69e7dbaaed0ffdef8125e79218672c30161d:
+  Merge tag 'pull-error-2024-05-27' of https://repo.or.cz/qemu/armbru into staging (2024-05-27 06:40:42 -0700)
   Merge remote-tracking branch 'remotes/cschoenebeck/tags/pull-9p-20211027' into staging (2021-10-27 11:45:18 -0700)
 are available in the Git repository at:
-  git@github.com:alistair23/qemu.git tags/pull-riscv-to-apply-20211028
+  https://github.com/alistair23/qemu.git tags/pull-riscv-to-apply-20240528
-for you to fetch changes up to 344b61e1478c8eb37e81b96f63d8f5071f5a38e1:
+for you to fetch changes up to 1806da76cb81088ea026ca3441551782b850e393:
-  target/riscv: remove force HS exception (2021-10-28 14:39:23 +1000)
+  target/riscv: raise an exception when CSRRS/CSRRC writes a read-only CSR (2024-05-28 12:20:27 +1000)
 ----------------------------------------------------------------
-Fifth RISC-V PR for QEMU 6.2
+RISC-V PR for 9.1
- - Use a shared PLIC config helper function
+* APLICs add child earlier than realize
- - Fixup the OpenTitan PLIC configuration
+* Fix exposure of Zkr
- - Add support for the experimental J extension
+* Raise exceptions on wrs.nto
- - Update the fmin/fmax handling
+* Implement SBI debug console (DBCN) calls for KVM
- - Fixup VS interrupt forwarding
+* Support 64-bit addresses for initrd
 * Change RISCV_EXCP_SEMIHOST exception number to 63
 * Tolerate KVM disable ext errors
 * Set tval in breakpoints
 * Add support for Zve32x extension
 * Add support for Zve64x extension
 * Relax vector register check in RISCV gdbstub
 * Fix the element agnostic Vector function problem
 * Fix Zvkb extension config
 * Implement dynamic establishment of custom decoder
 * Add th.sxstatus CSR emulation
 * Fix Zvfhmin checking for vfwcvt.f.f.v and vfncvt.f.f.w instructions
 * Check single width operator for vector fp widen instructions
 * Check single width operator for vfncvt.rod.f.f.w
 * Remove redudant SEW checking for vector fp narrow/widen instructions
 * Prioritize pmp errors in raise_mmu_exception()
 * Do not set mtval2 for non guest-page faults
 * Remove experimental prefix from "B" extension
 * Fixup CBO extension register calculation
 * Fix the hart bit setting of AIA
 * Fix reg_width in ricsv_gen_dynamic_vector_feature()
 * Decode all of the pmpcfg and pmpaddr CSRs
 * Raise an exception when CSRRS/CSRRC writes a read-only CSR
 ----------------------------------------------------------------
-Alexey Baturo (7):
+Alexei Filippov (1):
-      target/riscv: Add J-extension into RISC-V
+      target/riscv: do not set mtval2 for non guest-page faults
       target/riscv: Add CSR defines for RISC-V PM extension
       target/riscv: Support CSRs required for RISC-V PM extension except for the h-mode
       target/riscv: Add J extension state description
       target/riscv: Print new PM CSRs in QEMU logs
       target/riscv: Support pointer masking for RISC-V for i/c/f/d/a types of instructions
       target/riscv: Allow experimental J-ext to be turned on
-Alistair Francis (6):
+Alistair Francis (2):
-      hw/riscv: virt: Don't use a macro for the PLIC configuration
+      target/riscv: rvzicbo: Fixup CBO extension register calculation
-      hw/riscv: boot: Add a PLIC config string function
+      disas/riscv: Decode all of the pmpcfg and pmpaddr CSRs
       hw/riscv: sifive_u: Use the PLIC config helper function
       hw/riscv: microchip_pfsoc: Use the PLIC config helper function
       hw/riscv: virt: Use the PLIC config helper function
       hw/riscv: opentitan: Fixup the PLIC context addresses
-Anatoly Parshintsev (1):
+Andrew Jones (2):
-      target/riscv: Implement address masking functions required for RISC-V Pointer Masking extension
+      target/riscv/kvm: Fix exposure of Zkr
       target/riscv: Raise exceptions on wrs.nto
-Chih-Min Chao (2):
+Cheng Yang (1):
-      softfloat: add APIs to handle alternative sNaN propagation for fmax/fmin
+      hw/riscv/boot.c: Support 64-bit address for initrd
       target/riscv: change the api for RVF/RVD fmin/fmax
-Jose Martins (2):
+Christoph Müllner (1):
-      target/riscv: fix VS interrupts forwarding to HS
+      riscv: thead: Add th.sxstatus CSR emulation
       target/riscv: remove force HS exception
- include/fpu/softfloat.h                 |  10 ++
+Clément Léger (1):
- include/hw/riscv/boot.h                 |   2 +
+      target/riscv: change RISCV_EXCP_SEMIHOST exception number to 63
  include/hw/riscv/microchip_pfsoc.h      |   1 -
  include/hw/riscv/sifive_u.h             |   1 -
  include/hw/riscv/virt.h                 |   1 -
  target/riscv/cpu.h                      |  17 +-
  target/riscv/cpu_bits.h                 | 102 +++++++++++-
  fpu/softfloat.c                         |  19 ++-
  hw/riscv/boot.c                         |  25 +++
  hw/riscv/microchip_pfsoc.c              |  14 +-
  hw/riscv/opentitan.c                    |   4 +-
  hw/riscv/sifive_u.c                     |  14 +-
  hw/riscv/virt.c                         |  20 +--
  target/riscv/cpu.c                      |  13 ++
  target/riscv/cpu_helper.c               |  72 +++-----
  target/riscv/csr.c                      | 285 ++++++++++++++++++++++++++++++++
  target/riscv/fpu_helper.c               |  16 +-
  target/riscv/machine.c                  |  27 +++
  target/riscv/translate.c                |  43 +++++
  fpu/softfloat-parts.c.inc               |  25 ++-
  target/riscv/insn_trans/trans_rva.c.inc |   3 +
  target/riscv/insn_trans/trans_rvd.c.inc |   2 +
  target/riscv/insn_trans/trans_rvf.c.inc |   2 +
  target/riscv/insn_trans/trans_rvi.c.inc |   2 +
 files changed, 605 insertions(+), 115 deletions(-)
+Daniel Henrique Barboza (6):
+      target/riscv/kvm: implement SBI debug console (DBCN) calls
+      target/riscv/kvm: tolerate KVM disable ext errors
+      target/riscv/debug: set tval=pc in breakpoint exceptions
+      trans_privileged.c.inc: set (m|s)tval on ebreak breakpoint
+      target/riscv: prioritize pmp errors in raise_mmu_exception()
+      riscv, gdbstub.c: fix reg_width in ricsv_gen_dynamic_vector_feature()
+Huang Tao (2):
+      target/riscv: Fix the element agnostic function problem
+      target/riscv: Implement dynamic establishment of custom decoder
+Jason Chien (3):
+      target/riscv: Add support for Zve32x extension
+      target/riscv: Add support for Zve64x extension
+      target/riscv: Relax vector register check in RISCV gdbstub
+Max Chou (4):
+      target/riscv: rvv: Fix Zvfhmin checking for vfwcvt.f.f.v and vfncvt.f.f.w instructions
+      target/riscv: rvv: Check single width operator for vector fp widen instructions
+      target/riscv: rvv: Check single width operator for vfncvt.rod.f.f.w
+      target/riscv: rvv: Remove redudant SEW checking for vector fp narrow/widen instructions
+Rob Bradford (1):
+      target/riscv: Remove experimental prefix from "B" extension
+Yangyu Chen (1):
+      target/riscv/cpu.c: fix Zvkb extension config
+Yong-Xuan Wang (1):
+      target/riscv/kvm.c: Fix the hart bit setting of AIA
+Yu-Ming Chang (1):
+      target/riscv: raise an exception when CSRRS/CSRRC writes a read-only CSR
+yang.zhang (1):
+      hw/intc/riscv_aplic: APLICs should add child earlier than realize
+ MAINTAINERS                                    |   1 +
+ target/riscv/cpu.h                             |  11 ++
+ target/riscv/cpu_bits.h                        |   2 +-
+ target/riscv/cpu_cfg.h                         |   2 +
+ target/riscv/helper.h                          |   1 +
+ target/riscv/sbi_ecall_interface.h             |  17 +++
+ target/riscv/tcg/tcg-cpu.h                     |  15 +++
+ disas/riscv.c                                  |  65 +++++++++-
+ hw/intc/riscv_aplic.c                          |   8 +-
+ hw/riscv/boot.c                                |   4 +-
+ target/riscv/cpu.c                             |  10 +-
+ target/riscv/cpu_helper.c                      |  37 +++---
+ target/riscv/csr.c                             |  71 +++++++++--
+ target/riscv/debug.c                           |   3 +
+ target/riscv/gdbstub.c                         |   8 +-
+ target/riscv/kvm/kvm-cpu.c                     | 157 ++++++++++++++++++++++++-
+ target/riscv/op_helper.c                       |  17 ++-
+ target/riscv/tcg/tcg-cpu.c                     |  50 +++++---
+ target/riscv/th_csr.c                          |  79 +++++++++++++
+ target/riscv/translate.c                       |  31 +++--
+ target/riscv/vector_internals.c                |  22 ++++
+ target/riscv/insn_trans/trans_privileged.c.inc |   2 +
+ target/riscv/insn_trans/trans_rvv.c.inc        |  46 +++++---
+ target/riscv/insn_trans/trans_rvzawrs.c.inc    |  29 +++--
+ target/riscv/insn_trans/trans_rvzicbo.c.inc    |  16 ++-
+ target/riscv/meson.build                       |   1 +
+files changed, 596 insertions(+), 109 deletions(-)
+ create mode 100644 target/riscv/th_csr.c

-New patch
+[PULL 01/28] hw/intc/riscv_aplic: APLICs should add child earlier than realize
+From: "yang.zhang" <yang.zhang@hexintek.com>
+Since only root APLICs can have hw IRQ lines, aplic->parent should
+be initialized first.
+Fixes: e8f79343cf ("hw/intc: Add RISC-V AIA APLIC device emulation")
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Signed-off-by: yang.zhang <yang.zhang@hexintek.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240409014445.278-1-gaoshanliukou@163.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ hw/intc/riscv_aplic.c | 8 ++++----
+file changed, 4 insertions(+), 4 deletions(-)
+diff --git a/hw/intc/riscv_aplic.c b/hw/intc/riscv_aplic.c
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/intc/riscv_aplic.c
++++ b/hw/intc/riscv_aplic.c
+@@ -XXX,XX +XXX,XX @@ DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size,
+     qdev_prop_set_bit(dev, "msimode", msimode);
+     qdev_prop_set_bit(dev, "mmode", mmode);
++    if (parent) {
++        riscv_aplic_add_child(parent, dev);
++    }
++
+     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
+     if (!is_kvm_aia(msimode)) {
+         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
+     }
+-    if (parent) {
+-        riscv_aplic_add_child(parent, dev);
+-    }
+-
+     if (!msimode) {
+         for (i = 0; i < num_harts; i++) {
+             CPUState *cpu = cpu_by_arch_id(hartid_base + i);
+--
+.45.1

-[PULL 07/18] target/riscv: Add J-extension into RISC-V
+[PULL 02/28] target/riscv/kvm: Fix exposure of Zkr
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Andrew Jones <ajones@ventanamicro.com>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+The Zkr extension may only be exposed to KVM guests if the VMM
-Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+implements the SEED CSR. Use the same implementation as TCG.
-Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
+Without this patch, running with a KVM which does not forward the
-Message-id: 20211025173609.2724490-2-space.monkey.delivers@gmail.com
+SEED CSR access to QEMU will result in an ILL exception being
 injected into the guest (this results in Linux guests crashing on
 boot). And, when running with a KVM which does forward the access,
 QEMU will crash, since QEMU doesn't know what to do with the exit.
 Fixes: 3108e2f1c69d ("target/riscv/kvm: update KVM exts to Linux 6.8")
 Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
 Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Cc: qemu-stable <qemu-stable@nongnu.org>
 Message-ID: <20240422134605.534207-2-ajones@ventanamicro.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu.h | 2 ++
+ target/riscv/cpu.h         |  3 +++
-file changed, 2 insertions(+)
+ target/riscv/csr.c         | 18 ++++++++++++++----
  target/riscv/kvm/kvm-cpu.c | 25 +++++++++++++++++++++++++
 files changed, 42 insertions(+), 4 deletions(-)
 diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.h
 +++ b/target/riscv/cpu.h
-@@ -XXX,XX +XXX,XX @@
+@@ -XXX,XX +XXX,XX @@ void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops);
- #define RVS RV('S')
- #define RVU RV('U')
+ void riscv_cpu_register_gdb_regs_for_features(CPUState *cs);
- #define RVH RV('H')
-+#define RVJ RV('J')
++target_ulong riscv_new_csr_seed(target_ulong new_value,
++                                target_ulong write_mask);
- /* S extension denotes that Supervisor mode exists, however it is possible
++
-    to have a core that support S mode but does not have an MMU and there
+ uint8_t satp_mode_max_from_map(uint32_t map);
-@@ -XXX,XX +XXX,XX @@ struct RISCVCPU {
+ const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
-         bool ext_s;
-         bool ext_u;
+diff --git a/target/riscv/csr.c b/target/riscv/csr.c
-         bool ext_h;
+index XXXXXXX..XXXXXXX 100644
-+        bool ext_j;
+--- a/target/riscv/csr.c
-         bool ext_v;
++++ b/target/riscv/csr.c
-         bool ext_zba;
+@@ -XXX,XX +XXX,XX @@ static RISCVException write_upmbase(CPURISCVState *env, int csrno,
-         bool ext_zbb;
+ #endif
  /* Crypto Extension */
 -static RISCVException rmw_seed(CPURISCVState *env, int csrno,
 -                               target_ulong *ret_value,
 -                               target_ulong new_value,
 -                               target_ulong write_mask)
 +target_ulong riscv_new_csr_seed(target_ulong new_value,
 +                                target_ulong write_mask)
  {
      uint16_t random_v;
      Error *random_e = NULL;
@@ -XXX,XX +XXX,XX @@ static RISCVException rmw_seed(CPURISCVState *env, int csrno,
          rval = random_v | SEED_OPST_ES16;
      }
 +    return rval;
 +}
 +
 +static RISCVException rmw_seed(CPURISCVState *env, int csrno,
 +                               target_ulong *ret_value,
 +                               target_ulong new_value,
 +                               target_ulong write_mask)
 +{
 +    target_ulong rval;
 +
 +    rval = riscv_new_csr_seed(new_value, write_mask);
 +
      if (ret_value) {
          *ret_value = rval;
      }
 diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/kvm/kvm-cpu.c
 +++ b/target/riscv/kvm/kvm-cpu.c
@@ -XXX,XX +XXX,XX @@ static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
      return ret;
  }
 +static int kvm_riscv_handle_csr(CPUState *cs, struct kvm_run *run)
 +{
 +    target_ulong csr_num = run->riscv_csr.csr_num;
 +    target_ulong new_value = run->riscv_csr.new_value;
 +    target_ulong write_mask = run->riscv_csr.write_mask;
 +    int ret = 0;
 +
 +    switch (csr_num) {
 +    case CSR_SEED:
 +        run->riscv_csr.ret_value = riscv_new_csr_seed(new_value, write_mask);
 +        break;
 +    default:
 +        qemu_log_mask(LOG_UNIMP,
 +                      "%s: un-handled CSR EXIT for CSR %lx\n",
 +                      __func__, csr_num);
 +        ret = -1;
 +        break;
 +    }
 +
 +    return ret;
 +}
 +
  int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
  {
      int ret = 0;
@@ -XXX,XX +XXX,XX @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
      case KVM_EXIT_RISCV_SBI:
          ret = kvm_riscv_handle_sbi(cs, run);
          break;
 +    case KVM_EXIT_RISCV_CSR:
 +        ret = kvm_riscv_handle_csr(cs, run);
 +        break;
      default:
          qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
                        __func__, run->exit_reason);
 --
-.31.1
+.45.1

-[PULL 12/18] target/riscv: Support pointer masking for RISC-V for i/c/f/d/a types of instructions
+[PULL 03/28] target/riscv: Raise exceptions on wrs.nto
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Andrew Jones <ajones@ventanamicro.com>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+Implementing wrs.nto to always just return is consistent with the
-Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+specification, as the instruction is permitted to terminate the
 stall for any reason, but it's not useful for virtualization, where
 we'd like the guest to trap to the hypervisor in order to allow
 scheduling of the lock holding VCPU. Change to always immediately
 raise exceptions when the appropriate conditions are present,
 otherwise continue to just return. Note, immediately raising
 exceptions is also consistent with the specification since the
 time limit that should expire prior to the exception is
 implementation-specific.
 Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
 Reviewed-by: Christoph Müllner <christoph.muellner@vrull.eu>
 Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211025173609.2724490-7-space.monkey.delivers@gmail.com
+Message-ID: <20240424142808.62936-2-ajones@ventanamicro.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/translate.c                | 8 ++++++++
+ target/riscv/helper.h                       |  1 +
- target/riscv/insn_trans/trans_rva.c.inc | 3 +++
+ target/riscv/op_helper.c                    | 11 ++++++++
- target/riscv/insn_trans/trans_rvd.c.inc | 2 ++
+ target/riscv/insn_trans/trans_rvzawrs.c.inc | 29 ++++++++++++++-------
- target/riscv/insn_trans/trans_rvf.c.inc | 2 ++
+files changed, 32 insertions(+), 9 deletions(-)
  target/riscv/insn_trans/trans_rvi.c.inc | 2 ++
 files changed, 17 insertions(+)
-diff --git a/target/riscv/translate.c b/target/riscv/translate.c
+diff --git a/target/riscv/helper.h b/target/riscv/helper.h
 index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/translate.c
+--- a/target/riscv/helper.h
-+++ b/target/riscv/translate.c
++++ b/target/riscv/helper.h
-@@ -XXX,XX +XXX,XX @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong imm)
+@@ -XXX,XX +XXX,XX @@ DEF_HELPER_6(csrrw_i128, tl, env, int, tl, tl, tl, tl)
-     ctx->base.is_jmp = DISAS_NORETURN;
+ DEF_HELPER_1(sret, tl, env)
  DEF_HELPER_1(mret, tl, env)
  DEF_HELPER_1(wfi, void, env)
 +DEF_HELPER_1(wrs_nto, void, env)
  DEF_HELPER_1(tlb_flush, void, env)
  DEF_HELPER_1(tlb_flush_all, void, env)
  /* Native Debug */
 diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/op_helper.c
 +++ b/target/riscv/op_helper.c
@@ -XXX,XX +XXX,XX @@ void helper_wfi(CPURISCVState *env)
      }
  }
-+/*
++void helper_wrs_nto(CPURISCVState *env)
 + * Temp stub: generates address adjustment for PointerMasking
 + */
 +static TCGv gen_pm_adjust_address(DisasContext *s, TCGv src)
 +{
-+    return src;
++    if (env->virt_enabled && (env->priv == PRV_S || env->priv == PRV_U) &&
 +        get_field(env->hstatus, HSTATUS_VTW) &&
 +        !get_field(env->mstatus, MSTATUS_TW)) {
 +        riscv_raise_exception(env, RISCV_EXCP_VIRT_INSTRUCTION_FAULT, GETPC());
 +    } else if (env->priv != PRV_M && get_field(env->mstatus, MSTATUS_TW)) {
 +        riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
 +    }
 +}
 +
- #ifndef CONFIG_USER_ONLY
+ void helper_tlb_flush(CPURISCVState *env)
- /* The states of mstatus_fs are:
+ {
-  * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty
+     CPUState *cs = env_cpu(env);
-diff --git a/target/riscv/insn_trans/trans_rva.c.inc b/target/riscv/insn_trans/trans_rva.c.inc
+diff --git a/target/riscv/insn_trans/trans_rvzawrs.c.inc b/target/riscv/insn_trans/trans_rvzawrs.c.inc
 index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/insn_trans/trans_rva.c.inc
+--- a/target/riscv/insn_trans/trans_rvzawrs.c.inc
-+++ b/target/riscv/insn_trans/trans_rva.c.inc
++++ b/target/riscv/insn_trans/trans_rvzawrs.c.inc
-@@ -XXX,XX +XXX,XX @@ static bool gen_lr(DisasContext *ctx, arg_atomic *a, MemOp mop)
+@@ -XXX,XX +XXX,XX @@
-     if (a->rl) {
+  * this program.  If not, see <http://www.gnu.org/licenses/>.
-         tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
+  */
-     }
-+    src1 = gen_pm_adjust_address(ctx, src1);
+-static bool trans_wrs(DisasContext *ctx)
-     tcg_gen_qemu_ld_tl(load_val, src1, ctx->mem_idx, mop);
++static bool trans_wrs_sto(DisasContext *ctx, arg_wrs_sto *a)
-     if (a->aq) {
+ {
-         tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
+     if (!ctx->cfg_ptr->ext_zawrs) {
-@@ -XXX,XX +XXX,XX @@ static bool gen_sc(DisasContext *ctx, arg_atomic *a, MemOp mop)
+         return false;
-     TCGLabel *l2 = gen_new_label();
+@@ -XXX,XX +XXX,XX @@ static bool trans_wrs(DisasContext *ctx)
      src1 = get_gpr(ctx, a->rs1, EXT_ZERO);
 +    src1 = gen_pm_adjust_address(ctx, src1);
      tcg_gen_brcond_tl(TCG_COND_NE, load_res, src1, l1);
      /*
@@ -XXX,XX +XXX,XX @@ static bool gen_amo(DisasContext *ctx, arg_atomic *a,
      TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE);
      TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE);
 +    src1 = gen_pm_adjust_address(ctx, src1);
      func(dest, src1, src2, ctx->mem_idx, mop);
      gen_set_gpr(ctx, a->rd, dest);
 diff --git a/target/riscv/insn_trans/trans_rvd.c.inc b/target/riscv/insn_trans/trans_rvd.c.inc
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/insn_trans/trans_rvd.c.inc
 +++ b/target/riscv/insn_trans/trans_rvd.c.inc
@@ -XXX,XX +XXX,XX @@ static bool trans_fld(DisasContext *ctx, arg_fld *a)
          tcg_gen_addi_tl(temp, addr, a->imm);
          addr = temp;
      }
 +    addr = gen_pm_adjust_address(ctx, addr);
      tcg_gen_qemu_ld_i64(cpu_fpr[a->rd], addr, ctx->mem_idx, MO_TEQ);
@@ -XXX,XX +XXX,XX @@ static bool trans_fsd(DisasContext *ctx, arg_fsd *a)
          tcg_gen_addi_tl(temp, addr, a->imm);
          addr = temp;
      }
 +    addr = gen_pm_adjust_address(ctx, addr);
      tcg_gen_qemu_st_i64(cpu_fpr[a->rs2], addr, ctx->mem_idx, MO_TEQ);
 diff --git a/target/riscv/insn_trans/trans_rvf.c.inc b/target/riscv/insn_trans/trans_rvf.c.inc
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/insn_trans/trans_rvf.c.inc
 +++ b/target/riscv/insn_trans/trans_rvf.c.inc
@@ -XXX,XX +XXX,XX @@ static bool trans_flw(DisasContext *ctx, arg_flw *a)
          tcg_gen_addi_tl(temp, addr, a->imm);
          addr = temp;
      }
 +    addr = gen_pm_adjust_address(ctx, addr);
      dest = cpu_fpr[a->rd];
      tcg_gen_qemu_ld_i64(dest, addr, ctx->mem_idx, MO_TEUL);
@@ -XXX,XX +XXX,XX @@ static bool trans_fsw(DisasContext *ctx, arg_fsw *a)
          tcg_gen_addi_tl(temp, addr, a->imm);
          addr = temp;
      }
 +    addr = gen_pm_adjust_address(ctx, addr);
      tcg_gen_qemu_st_i64(cpu_fpr[a->rs2], addr, ctx->mem_idx, MO_TEUL);
 diff --git a/target/riscv/insn_trans/trans_rvi.c.inc b/target/riscv/insn_trans/trans_rvi.c.inc
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/insn_trans/trans_rvi.c.inc
 +++ b/target/riscv/insn_trans/trans_rvi.c.inc
@@ -XXX,XX +XXX,XX @@ static bool gen_load(DisasContext *ctx, arg_lb *a, MemOp memop)
          tcg_gen_addi_tl(temp, addr, a->imm);
          addr = temp;
      }
 +    addr = gen_pm_adjust_address(ctx, addr);
      tcg_gen_qemu_ld_tl(dest, addr, ctx->mem_idx, memop);
      gen_set_gpr(ctx, a->rd, dest);
@@ -XXX,XX +XXX,XX @@ static bool gen_store(DisasContext *ctx, arg_sb *a, MemOp memop)
          tcg_gen_addi_tl(temp, addr, a->imm);
          addr = temp;
      }
 +    addr = gen_pm_adjust_address(ctx, addr);
      tcg_gen_qemu_st_tl(data, addr, ctx->mem_idx, memop);
      return true;
+ }
+-#define GEN_TRANS_WRS(insn)                                     \
+-static bool trans_ ## insn(DisasContext *ctx, arg_ ## insn *a)  \
+-{                                                               \
+-    (void)a;                                                    \
+-    return trans_wrs(ctx);                                      \
+-}
++static bool trans_wrs_nto(DisasContext *ctx, arg_wrs_nto *a)
++{
++    if (!ctx->cfg_ptr->ext_zawrs) {
++        return false;
++    }
+-GEN_TRANS_WRS(wrs_nto)
+-GEN_TRANS_WRS(wrs_sto)
++    /*
++     * Depending on the mode of execution, mstatus.TW and hstatus.VTW, wrs.nto
++     * should raise an exception when the implementation-specific bounded time
++     * limit has expired. Our time limit is zero, so we either return
++     * immediately, as does our implementation of wrs.sto, or raise an
++     * exception, as handled by the wrs.nto helper.
++     */
++#ifndef CONFIG_USER_ONLY
++    gen_helper_wrs_nto(tcg_env);
++#endif
++
++    /* We only get here when helper_wrs_nto() doesn't raise an exception. */
++    return trans_wrs_sto(ctx, NULL);
++}
 --
-.31.1
+.45.1

-New patch
+[PULL 04/28] target/riscv/kvm: implement SBI debug console (DBCN) calls
+From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 SBI defines a Debug Console extension "DBCN" that will, in time, replace
 the legacy console putchar and getchar SBI extensions.
 The appeal of the DBCN extension is that it allows multiple bytes to be
 read/written in the SBI console in a single SBI call.
 As far as KVM goes, the DBCN calls are forwarded by an in-kernel KVM
 module to userspace. But this will only happens if the KVM module
 actually supports this SBI extension and we activate it.
 We'll check for DBCN support during init time, checking if get-reg-list
 is advertising KVM_RISCV_SBI_EXT_DBCN. In that case, we'll enable it via
 kvm_set_one_reg() during kvm_arch_init_vcpu().
 Finally, change kvm_riscv_handle_sbi() to handle the incoming calls for
 SBI_EXT_DBCN, reading and writing as required.
 A simple KVM guest with 'earlycon=sbi', running in an emulated RISC-V
 host, takes around 20 seconds to boot without using DBCN. With this
 patch we're taking around 14 seconds to boot due to the speed-up in the
 terminal output.  There's no change in boot time if the guest isn't
 using earlycon.
 Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
 Message-ID: <20240425155012.581366-1-dbarboza@ventanamicro.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
  target/riscv/sbi_ecall_interface.h |  17 +++++
  target/riscv/kvm/kvm-cpu.c         | 111 +++++++++++++++++++++++++++++
 files changed, 128 insertions(+)
 diff --git a/target/riscv/sbi_ecall_interface.h b/target/riscv/sbi_ecall_interface.h
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/sbi_ecall_interface.h
 +++ b/target/riscv/sbi_ecall_interface.h
@@ -XXX,XX +XXX,XX @@
  /* clang-format off */
 +#define SBI_SUCCESS                      0
 +#define SBI_ERR_FAILED                  -1
 +#define SBI_ERR_NOT_SUPPORTED           -2
 +#define SBI_ERR_INVALID_PARAM           -3
 +#define SBI_ERR_DENIED                  -4
 +#define SBI_ERR_INVALID_ADDRESS         -5
 +#define SBI_ERR_ALREADY_AVAILABLE       -6
 +#define SBI_ERR_ALREADY_STARTED         -7
 +#define SBI_ERR_ALREADY_STOPPED         -8
 +#define SBI_ERR_NO_SHMEM                -9
 +
  /* SBI Extension IDs */
  #define SBI_EXT_0_1_SET_TIMER           0x0
  #define SBI_EXT_0_1_CONSOLE_PUTCHAR     0x1
@@ -XXX,XX +XXX,XX @@
  #define SBI_EXT_IPI                     0x735049
  #define SBI_EXT_RFENCE                  0x52464E43
  #define SBI_EXT_HSM                     0x48534D
 +#define SBI_EXT_DBCN                    0x4442434E
  /* SBI function IDs for BASE extension */
  #define SBI_EXT_BASE_GET_SPEC_VERSION   0x0
@@ -XXX,XX +XXX,XX @@
  #define SBI_EXT_HSM_HART_STOP           0x1
  #define SBI_EXT_HSM_HART_GET_STATUS     0x2
 +/* SBI function IDs for DBCN extension */
 +#define SBI_EXT_DBCN_CONSOLE_WRITE      0x0
 +#define SBI_EXT_DBCN_CONSOLE_READ       0x1
 +#define SBI_EXT_DBCN_CONSOLE_WRITE_BYTE 0x2
 +
  #define SBI_HSM_HART_STATUS_STARTED     0x0
  #define SBI_HSM_HART_STATUS_STOPPED     0x1
  #define SBI_HSM_HART_STATUS_START_PENDING   0x2
 diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/kvm/kvm-cpu.c
 +++ b/target/riscv/kvm/kvm-cpu.c
@@ -XXX,XX +XXX,XX @@ static KVMCPUConfig kvm_v_vlenb = {
                     KVM_REG_RISCV_VECTOR_CSR_REG(vlenb)
  };
 +static KVMCPUConfig kvm_sbi_dbcn = {
 +    .name = "sbi_dbcn",
 +    .kvm_reg_id = KVM_REG_RISCV | KVM_REG_SIZE_U64 |
 +                  KVM_REG_RISCV_SBI_EXT | KVM_RISCV_SBI_EXT_DBCN
 +};
 +
  static void kvm_riscv_update_cpu_cfg_isa_ext(RISCVCPU *cpu, CPUState *cs)
  {
      CPURISCVState *env = &cpu->env;
@@ -XXX,XX +XXX,XX @@ static int uint64_cmp(const void *a, const void *b)
      return 0;
  }
 +static void kvm_riscv_check_sbi_dbcn_support(RISCVCPU *cpu,
 +                                             KVMScratchCPU *kvmcpu,
 +                                             struct kvm_reg_list *reglist)
 +{
 +    struct kvm_reg_list *reg_search;
 +
 +    reg_search = bsearch(&kvm_sbi_dbcn.kvm_reg_id, reglist->reg, reglist->n,
 +                         sizeof(uint64_t), uint64_cmp);
 +
 +    if (reg_search) {
 +        kvm_sbi_dbcn.supported = true;
 +    }
 +}
 +
  static void kvm_riscv_read_vlenb(RISCVCPU *cpu, KVMScratchCPU *kvmcpu,
                                   struct kvm_reg_list *reglist)
  {
@@ -XXX,XX +XXX,XX @@ static void kvm_riscv_init_multiext_cfg(RISCVCPU *cpu, KVMScratchCPU *kvmcpu)
      if (riscv_has_ext(&cpu->env, RVV)) {
          kvm_riscv_read_vlenb(cpu, kvmcpu, reglist);
      }
 +
 +    kvm_riscv_check_sbi_dbcn_support(cpu, kvmcpu, reglist);
  }
  static void riscv_init_kvm_registers(Object *cpu_obj)
@@ -XXX,XX +XXX,XX @@ static int kvm_vcpu_set_machine_ids(RISCVCPU *cpu, CPUState *cs)
      return ret;
  }
 +static int kvm_vcpu_enable_sbi_dbcn(RISCVCPU *cpu, CPUState *cs)
 +{
 +    target_ulong reg = 1;
 +
 +    if (!kvm_sbi_dbcn.supported) {
 +        return 0;
 +    }
 +
 +    return kvm_set_one_reg(cs, kvm_sbi_dbcn.kvm_reg_id, &reg);
 +}
 +
  int kvm_arch_init_vcpu(CPUState *cs)
  {
      int ret = 0;
@@ -XXX,XX +XXX,XX @@ int kvm_arch_init_vcpu(CPUState *cs)
      kvm_riscv_update_cpu_misa_ext(cpu, cs);
      kvm_riscv_update_cpu_cfg_isa_ext(cpu, cs);
 +    ret = kvm_vcpu_enable_sbi_dbcn(cpu, cs);
 +
      return ret;
  }
@@ -XXX,XX +XXX,XX @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs)
      return true;
  }
 +static void kvm_riscv_handle_sbi_dbcn(CPUState *cs, struct kvm_run *run)
 +{
 +    g_autofree uint8_t *buf = NULL;
 +    RISCVCPU *cpu = RISCV_CPU(cs);
 +    target_ulong num_bytes;
 +    uint64_t addr;
 +    unsigned char ch;
 +    int ret;
 +
 +    switch (run->riscv_sbi.function_id) {
 +    case SBI_EXT_DBCN_CONSOLE_READ:
 +    case SBI_EXT_DBCN_CONSOLE_WRITE:
 +        num_bytes = run->riscv_sbi.args[0];
 +
 +        if (num_bytes == 0) {
 +            run->riscv_sbi.ret[0] = SBI_SUCCESS;
 +            run->riscv_sbi.ret[1] = 0;
 +            break;
 +        }
 +
 +        addr = run->riscv_sbi.args[1];
 +
 +        /*
 +         * Handle the case where a 32 bit CPU is running in a
 +         * 64 bit addressing env.
 +         */
 +        if (riscv_cpu_mxl(&cpu->env) == MXL_RV32) {
 +            addr |= (uint64_t)run->riscv_sbi.args[2] << 32;
 +        }
 +
 +        buf = g_malloc0(num_bytes);
 +
 +        if (run->riscv_sbi.function_id == SBI_EXT_DBCN_CONSOLE_READ) {
 +            ret = qemu_chr_fe_read_all(serial_hd(0)->be, buf, num_bytes);
 +            if (ret < 0) {
 +                error_report("SBI_EXT_DBCN_CONSOLE_READ: error when "
 +                             "reading chardev");
 +                exit(1);
 +            }
 +
 +            cpu_physical_memory_write(addr, buf, ret);
 +        } else {
 +            cpu_physical_memory_read(addr, buf, num_bytes);
 +
 +            ret = qemu_chr_fe_write_all(serial_hd(0)->be, buf, num_bytes);
 +            if (ret < 0) {
 +                error_report("SBI_EXT_DBCN_CONSOLE_WRITE: error when "
 +                             "writing chardev");
 +                exit(1);
 +            }
 +        }
 +
 +        run->riscv_sbi.ret[0] = SBI_SUCCESS;
 +        run->riscv_sbi.ret[1] = ret;
 +        break;
 +    case SBI_EXT_DBCN_CONSOLE_WRITE_BYTE:
 +        ch = run->riscv_sbi.args[0];
 +        ret = qemu_chr_fe_write(serial_hd(0)->be, &ch, sizeof(ch));
 +
 +        if (ret < 0) {
 +            error_report("SBI_EXT_DBCN_CONSOLE_WRITE_BYTE: error when "
 +                         "writing chardev");
 +            exit(1);
 +        }
 +
 +        run->riscv_sbi.ret[0] = SBI_SUCCESS;
 +        run->riscv_sbi.ret[1] = 0;
 +        break;
 +    default:
 +        run->riscv_sbi.ret[0] = SBI_ERR_NOT_SUPPORTED;
 +    }
 +}
 +
  static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
  {
      int ret = 0;
@@ -XXX,XX +XXX,XX @@ static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
          }
          ret = 0;
          break;
 +    case SBI_EXT_DBCN:
 +        kvm_riscv_handle_sbi_dbcn(cs, run);
 +        break;
      default:
          qemu_log_mask(LOG_UNIMP,
                        "%s: un-handled SBI EXIT, specific reasons is %lu\n",
 --
 .45.1

-[PULL 02/18] hw/riscv: boot: Add a PLIC config string function
+[PULL 05/28] hw/riscv/boot.c: Support 64-bit address for initrd
-From: Alistair Francis <alistair.francis@wdc.com>
+From: Cheng Yang <yangcheng.work@foxmail.com>
-Add a generic function that can create the PLIC strings.
+Use qemu_fdt_setprop_u64() instead of qemu_fdt_setprop_cell()
 to set the address of initrd in FDT to support 64-bit address.
+Signed-off-by: Cheng Yang <yangcheng.work@foxmail.com>
+Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
+Message-ID: <tencent_A4482251DD0890F312758FA6B33F60815609@qq.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-Message-id: 20211022060133.3045020-2-alistair.francis@opensource.wdc.com
 ---
- include/hw/riscv/boot.h |  2 ++
+ hw/riscv/boot.c | 4 ++--
- hw/riscv/boot.c         | 25 +++++++++++++++++++++++++
+file changed, 2 insertions(+), 2 deletions(-)
 files changed, 27 insertions(+)
-diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h
-index XXXXXXX..XXXXXXX 100644
---- a/include/hw/riscv/boot.h
-+++ b/include/hw/riscv/boot.h
-@@ -XXX,XX +XXX,XX @@
- bool riscv_is_32bit(RISCVHartArrayState *harts);
-+char *riscv_plic_hart_config_string(int hart_count);
-+
- target_ulong riscv_calc_kernel_start_addr(RISCVHartArrayState *harts,
-                                           target_ulong firmware_end_addr);
- target_ulong riscv_find_and_load_firmware(MachineState *machine,
 diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
 index XXXXXXX..XXXXXXX 100644
 --- a/hw/riscv/boot.c
 +++ b/hw/riscv/boot.c
-@@ -XXX,XX +XXX,XX @@ bool riscv_is_32bit(RISCVHartArrayState *harts)
+@@ -XXX,XX +XXX,XX @@ static void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry)
-     return harts->harts[0].env.misa_mxl_max == MXL_RV32;
+     /* Some RISC-V machines (e.g. opentitan) don't have a fdt. */
      if (fdt) {
          end = start + size;
 -        qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", start);
 -        qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", end);
 +        qemu_fdt_setprop_u64(fdt, "/chosen", "linux,initrd-start", start);
 +        qemu_fdt_setprop_u64(fdt, "/chosen", "linux,initrd-end", end);
      }
  }
-+/*
-+ * Return the per-socket PLIC hart topology configuration string
-+ * (caller must free with g_free())
-+ */
-+char *riscv_plic_hart_config_string(int hart_count)
-+{
-+    g_autofree const char **vals = g_new(const char *, hart_count + 1);
-+    int i;
-+
-+    for (i = 0; i < hart_count; i++) {
-+        CPUState *cs = qemu_get_cpu(i);
-+        CPURISCVState *env = &RISCV_CPU(cs)->env;
-+
-+        if (riscv_has_ext(env, RVS)) {
-+            vals[i] = "MS";
-+        } else {
-+            vals[i] = "M";
-+        }
-+    }
-+    vals[i] = NULL;
-+
-+    /* g_strjoinv() obliges us to cast away const here */
-+    return g_strjoinv(",", (char **)vals);
-+}
-+
- target_ulong riscv_calc_kernel_start_addr(RISCVHartArrayState *harts,
-                                           target_ulong firmware_end_addr) {
-     if (riscv_is_32bit(harts)) {
 --
-.31.1
+.45.1

-[PULL 08/18] target/riscv: Add CSR defines for RISC-V PM extension
+[PULL 06/28] target/riscv: change RISCV_EXCP_SEMIHOST exception number to 63
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Clément Léger <cleger@rivosinc.com>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+The current semihost exception number (16) is a reserved number (range
 [16-17]). The upcoming double trap specification uses that number for
 the double trap exception. Since the privileged spec (Table 22) defines
 ranges for custom uses change the semihosting exception number to 63
 which belongs to the range [48-63] in order to avoid any future
 collisions with reserved exception.
 Signed-off-by: Clément Léger <cleger@rivosinc.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211025173609.2724490-3-space.monkey.delivers@gmail.com
+Message-ID: <20240422135840.1959967-1-cleger@rivosinc.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu_bits.h | 96 +++++++++++++++++++++++++++++++++++++++++
+ target/riscv/cpu_bits.h | 2 +-
-file changed, 96 insertions(+)
+file changed, 1 insertion(+), 1 deletion(-)
 diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu_bits.h
 +++ b/target/riscv/cpu_bits.h
-@@ -XXX,XX +XXX,XX @@
- #define CSR_MHPMCOUNTER30H  0xb9e
- #define CSR_MHPMCOUNTER31H  0xb9f
-+/*
-+ * User PointerMasking registers
-+ * NB: actual CSR numbers might be changed in future
-+ */
-+#define CSR_UMTE            0x4c0
-+#define CSR_UPMMASK         0x4c1
-+#define CSR_UPMBASE         0x4c2
-+
-+/*
-+ * Machine PointerMasking registers
-+ * NB: actual CSR numbers might be changed in future
-+ */
-+#define CSR_MMTE            0x3c0
-+#define CSR_MPMMASK         0x3c1
-+#define CSR_MPMBASE         0x3c2
-+
-+/*
-+ * Supervisor PointerMaster registers
-+ * NB: actual CSR numbers might be changed in future
-+ */
-+#define CSR_SMTE            0x1c0
-+#define CSR_SPMMASK         0x1c1
-+#define CSR_SPMBASE         0x1c2
-+
-+/*
-+ * Hypervisor PointerMaster registers
-+ * NB: actual CSR numbers might be changed in future
-+ */
-+#define CSR_VSMTE           0x2c0
-+#define CSR_VSPMMASK        0x2c1
-+#define CSR_VSPMBASE        0x2c2
-+
- /* mstatus CSR bits */
- #define MSTATUS_UIE         0x00000001
- #define MSTATUS_SIE         0x00000002
 @@ -XXX,XX +XXX,XX @@ typedef enum RISCVException {
- #define MIE_UTIE                           (1 << IRQ_U_TIMER)
+     RISCV_EXCP_INST_PAGE_FAULT = 0xc, /* since: priv-1.10.0 */
- #define MIE_SSIE                           (1 << IRQ_S_SOFT)
+     RISCV_EXCP_LOAD_PAGE_FAULT = 0xd, /* since: priv-1.10.0 */
- #define MIE_USIE                           (1 << IRQ_U_SOFT)
+     RISCV_EXCP_STORE_PAGE_FAULT = 0xf, /* since: priv-1.10.0 */
-+
+-    RISCV_EXCP_SEMIHOST = 0x10,
-+/* General PointerMasking CSR bits*/
+     RISCV_EXCP_INST_GUEST_PAGE_FAULT = 0x14,
-+#define PM_ENABLE       0x00000001ULL
+     RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT = 0x15,
-+#define PM_CURRENT      0x00000002ULL
+     RISCV_EXCP_VIRT_INSTRUCTION_FAULT = 0x16,
-+#define PM_INSN         0x00000004ULL
+     RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT = 0x17,
-+#define PM_XS_MASK      0x00000003ULL
++    RISCV_EXCP_SEMIHOST = 0x3f,
-+
+ } RISCVException;
-+/* PointerMasking XS bits values */
-+#define PM_EXT_DISABLE  0x00000000ULL
+ #define RISCV_EXCP_INT_FLAG                0x80000000
 +#define PM_EXT_INITIAL  0x00000001ULL
 +#define PM_EXT_CLEAN    0x00000002ULL
 +#define PM_EXT_DIRTY    0x00000003ULL
 +
 +/* Offsets for every pair of control bits per each priv level */
 +#define XS_OFFSET    0ULL
 +#define U_OFFSET     2ULL
 +#define S_OFFSET     5ULL
 +#define M_OFFSET     8ULL
 +
 +#define PM_XS_BITS   (PM_XS_MASK << XS_OFFSET)
 +#define U_PM_ENABLE  (PM_ENABLE  << U_OFFSET)
 +#define U_PM_CURRENT (PM_CURRENT << U_OFFSET)
 +#define U_PM_INSN    (PM_INSN    << U_OFFSET)
 +#define S_PM_ENABLE  (PM_ENABLE  << S_OFFSET)
 +#define S_PM_CURRENT (PM_CURRENT << S_OFFSET)
 +#define S_PM_INSN    (PM_INSN    << S_OFFSET)
 +#define M_PM_ENABLE  (PM_ENABLE  << M_OFFSET)
 +#define M_PM_CURRENT (PM_CURRENT << M_OFFSET)
 +#define M_PM_INSN    (PM_INSN    << M_OFFSET)
 +
 +/* mmte CSR bits */
 +#define MMTE_PM_XS_BITS     PM_XS_BITS
 +#define MMTE_U_PM_ENABLE    U_PM_ENABLE
 +#define MMTE_U_PM_CURRENT   U_PM_CURRENT
 +#define MMTE_U_PM_INSN      U_PM_INSN
 +#define MMTE_S_PM_ENABLE    S_PM_ENABLE
 +#define MMTE_S_PM_CURRENT   S_PM_CURRENT
 +#define MMTE_S_PM_INSN      S_PM_INSN
 +#define MMTE_M_PM_ENABLE    M_PM_ENABLE
 +#define MMTE_M_PM_CURRENT   M_PM_CURRENT
 +#define MMTE_M_PM_INSN      M_PM_INSN
 +#define MMTE_MASK    (MMTE_U_PM_ENABLE | MMTE_U_PM_CURRENT | MMTE_U_PM_INSN | \
 +                      MMTE_S_PM_ENABLE | MMTE_S_PM_CURRENT | MMTE_S_PM_INSN | \
 +                      MMTE_M_PM_ENABLE | MMTE_M_PM_CURRENT | MMTE_M_PM_INSN | \
 +                      MMTE_PM_XS_BITS)
 +
 +/* (v)smte CSR bits */
 +#define SMTE_PM_XS_BITS     PM_XS_BITS
 +#define SMTE_U_PM_ENABLE    U_PM_ENABLE
 +#define SMTE_U_PM_CURRENT   U_PM_CURRENT
 +#define SMTE_U_PM_INSN      U_PM_INSN
 +#define SMTE_S_PM_ENABLE    S_PM_ENABLE
 +#define SMTE_S_PM_CURRENT   S_PM_CURRENT
 +#define SMTE_S_PM_INSN      S_PM_INSN
 +#define SMTE_MASK    (SMTE_U_PM_ENABLE | SMTE_U_PM_CURRENT | SMTE_U_PM_INSN | \
 +                      SMTE_S_PM_ENABLE | SMTE_S_PM_CURRENT | SMTE_S_PM_INSN | \
 +                      SMTE_PM_XS_BITS)
 +
 +/* umte CSR bits */
 +#define UMTE_U_PM_ENABLE    U_PM_ENABLE
 +#define UMTE_U_PM_CURRENT   U_PM_CURRENT
 +#define UMTE_U_PM_INSN      U_PM_INSN
 +#define UMTE_MASK     (UMTE_U_PM_ENABLE | MMTE_U_PM_CURRENT | UMTE_U_PM_INSN)
 +
  #endif
 --
-.31.1
+.45.1

-New patch
+[PULL 07/28] target/riscv/kvm: tolerate KVM disable ext errors
+From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Running a KVM guest using a 6.9-rc3 kernel, in a 6.8 host that has zkr
+enabled, will fail with a kernel oops SIGILL right at the start. The
+reason is that we can't expose zkr without implementing the SEED CSR.
+Disabling zkr in the guest would be a workaround, but if the KVM doesn't
+allow it we'll error out and never boot.
+In hindsight this is too strict. If we keep proceeding, despite not
+disabling the extension in the KVM vcpu, we'll not add the extension in
+the riscv,isa. The guest kernel will be unaware of the extension, i.e.
+it doesn't matter if the KVM vcpu has it enabled underneath or not. So
+it's ok to keep booting in this case.
+Change our current logic to not error out if we fail to disable an
+extension in kvm_set_one_reg(), but show a warning and keep booting. It
+is important to throw a warning because we must make the user aware that
+the extension is still available in the vcpu, meaning that an
+ill-behaved guest can ignore the riscv,isa settings and  use the
+extension.
+The case we're handling happens with an EINVAL error code. If we fail to
+disable the extension in KVM for any other reason, error out.
+We'll also keep erroring out when we fail to enable an extension in KVM,
+since adding the extension in riscv,isa at this point will cause a guest
+malfunction because the extension isn't enabled in the vcpu.
+Suggested-by: Andrew Jones <ajones@ventanamicro.com>
+Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240422171425.333037-2-dbarboza@ventanamicro.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/kvm/kvm-cpu.c | 12 ++++++++----
+file changed, 8 insertions(+), 4 deletions(-)
+diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/kvm/kvm-cpu.c
++++ b/target/riscv/kvm/kvm-cpu.c
+@@ -XXX,XX +XXX,XX @@ static void kvm_riscv_update_cpu_cfg_isa_ext(RISCVCPU *cpu, CPUState *cs)
+         reg = kvm_cpu_cfg_get(cpu, multi_ext_cfg);
+         ret = kvm_set_one_reg(cs, id, &reg);
+         if (ret != 0) {
+-            error_report("Unable to %s extension %s in KVM, error %d",
+-                         reg ? "enable" : "disable",
+-                         multi_ext_cfg->name, ret);
+-            exit(EXIT_FAILURE);
++            if (!reg && ret == -EINVAL) {
++                warn_report("KVM cannot disable extension %s",
++                            multi_ext_cfg->name);
++            } else {
++                error_report("Unable to enable extension %s in KVM, error %d",
++                             multi_ext_cfg->name, ret);
++                exit(EXIT_FAILURE);
++            }
+         }
+     }
+ }
+--
+.45.1

-New patch
+[PULL 08/28] target/riscv/debug: set tval=pc in breakpoint exceptions
+From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+We're not setting (s/m)tval when triggering breakpoints of type 2
+(mcontrol) and 6 (mcontrol6). According to the debug spec section
+.7.12, "Match Control Type 6":
+"The Privileged Spec says that breakpoint exceptions that occur on
+instruction fetches, loads, or stores update the tval CSR with either
+zero or the faulting virtual address. The faulting virtual address for
+an mcontrol6 trigger with action = 0 is the address being accessed and
+which caused that trigger to fire."
+A similar text is also found in the Debug spec section 5.7.11 w.r.t.
+mcontrol.
+Note that what we're doing ATM is not violating the spec, but it's
+simple enough to set mtval/stval and it makes life easier for any
+software that relies on this info.
+Given that we always use action = 0, save the faulting address for the
+mcontrol and mcontrol6 trigger breakpoints into env->badaddr, which is
+used as as scratch area for traps with address information. 'tval' is
+then set during riscv_cpu_do_interrupt().
+Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
+Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
+Message-ID: <20240416230437.1869024-2-dbarboza@ventanamicro.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/cpu_helper.c | 1 +
+ target/riscv/debug.c      | 3 +++
+files changed, 4 insertions(+)
+diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/cpu_helper.c
++++ b/target/riscv/cpu_helper.c
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
+             tval = env->bins;
+             break;
+         case RISCV_EXCP_BREAKPOINT:
++            tval = env->badaddr;
+             if (cs->watchpoint_hit) {
+                 tval = cs->watchpoint_hit->hitaddr;
+                 cs->watchpoint_hit = NULL;
+diff --git a/target/riscv/debug.c b/target/riscv/debug.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/debug.c
++++ b/target/riscv/debug.c
+@@ -XXX,XX +XXX,XX @@ bool riscv_cpu_debug_check_breakpoint(CPUState *cs)
+                 if ((ctrl & TYPE2_EXEC) && (bp->pc == pc)) {
+                     /* check U/S/M bit against current privilege level */
+                     if ((ctrl >> 3) & BIT(env->priv)) {
++                        env->badaddr = pc;
+                         return true;
+                     }
+                 }
+@@ -XXX,XX +XXX,XX @@ bool riscv_cpu_debug_check_breakpoint(CPUState *cs)
+                     if (env->virt_enabled) {
+                         /* check VU/VS bit against current privilege level */
+                         if ((ctrl >> 23) & BIT(env->priv)) {
++                            env->badaddr = pc;
+                             return true;
+                         }
+                     } else {
+                         /* check U/S/M bit against current privilege level */
+                         if ((ctrl >> 3) & BIT(env->priv)) {
++                            env->badaddr = pc;
+                             return true;
+                         }
+                     }
+--
+.45.1

-New patch
+[PULL 09/28] trans_privileged.c.inc: set (m|s)tval on ebreak breakpoint
+From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Privileged spec section 4.1.9 mentions:
+"When a trap is taken into S-mode, stval is written with
+exception-specific information to assist software in handling the trap.
+(...)
+If stval is written with a nonzero value when a breakpoint,
+address-misaligned, access-fault, or page-fault exception occurs on an
+instruction fetch, load, or store, then stval will contain the faulting
+virtual address."
+A similar text is found for mtval in section 3.1.16.
+Setting mtval/stval in this scenario is optional, but some softwares read
+these regs when handling ebreaks.
+Write 'badaddr' in all ebreak breakpoints to write the appropriate
+'tval' during riscv_do_cpu_interrrupt().
+Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
+Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-ID: <20240416230437.1869024-3-dbarboza@ventanamicro.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/insn_trans/trans_privileged.c.inc | 2 ++
+file changed, 2 insertions(+)
+diff --git a/target/riscv/insn_trans/trans_privileged.c.inc b/target/riscv/insn_trans/trans_privileged.c.inc
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/insn_trans/trans_privileged.c.inc
++++ b/target/riscv/insn_trans/trans_privileged.c.inc
+@@ -XXX,XX +XXX,XX @@ static bool trans_ebreak(DisasContext *ctx, arg_ebreak *a)
+     if (pre == 0x01f01013 && ebreak == 0x00100073 && post == 0x40705013) {
+         generate_exception(ctx, RISCV_EXCP_SEMIHOST);
+     } else {
++        tcg_gen_st_tl(tcg_constant_tl(ebreak_addr), tcg_env,
++                      offsetof(CPURISCVState, badaddr));
+         generate_exception(ctx, RISCV_EXCP_BREAKPOINT);
+     }
+     return true;
+--
+.45.1

-New patch
+[PULL 10/28] target/riscv: Add support for Zve32x extension
+From: Jason Chien <jason.chien@sifive.com>
+Add support for Zve32x extension and replace some checks for Zve32f with
+Zve32x, since Zve32f depends on Zve32x.
+Signed-off-by: Jason Chien <jason.chien@sifive.com>
+Reviewed-by: Frank Chang <frank.chang@sifive.com>
+Reviewed-by: Max Chou <max.chou@sifive.com>
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Message-ID: <20240328022343.6871-2-jason.chien@sifive.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/cpu_cfg.h                  |  1 +
+ target/riscv/cpu.c                      |  2 ++
+ target/riscv/cpu_helper.c               |  2 +-
+ target/riscv/csr.c                      |  2 +-
+ target/riscv/tcg/tcg-cpu.c              | 16 ++++++++--------
+ target/riscv/insn_trans/trans_rvv.c.inc |  4 ++--
+files changed, 15 insertions(+), 12 deletions(-)
+diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/cpu_cfg.h
++++ b/target/riscv/cpu_cfg.h
+@@ -XXX,XX +XXX,XX @@ struct RISCVCPUConfig {
+     bool ext_zhinx;
+     bool ext_zhinxmin;
+     bool ext_zve32f;
++    bool ext_zve32x;
+     bool ext_zve64f;
+     bool ext_zve64d;
+     bool ext_zvbb;
+diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/cpu.c
++++ b/target/riscv/cpu.c
+@@ -XXX,XX +XXX,XX @@ const RISCVIsaExtData isa_edata_arr[] = {
+     ISA_EXT_DATA_ENTRY(zvbb, PRIV_VERSION_1_12_0, ext_zvbb),
+     ISA_EXT_DATA_ENTRY(zvbc, PRIV_VERSION_1_12_0, ext_zvbc),
+     ISA_EXT_DATA_ENTRY(zve32f, PRIV_VERSION_1_10_0, ext_zve32f),
++    ISA_EXT_DATA_ENTRY(zve32x, PRIV_VERSION_1_10_0, ext_zve32x),
+     ISA_EXT_DATA_ENTRY(zve64f, PRIV_VERSION_1_10_0, ext_zve64f),
+     ISA_EXT_DATA_ENTRY(zve64d, PRIV_VERSION_1_10_0, ext_zve64d),
+     ISA_EXT_DATA_ENTRY(zvfbfmin, PRIV_VERSION_1_12_0, ext_zvfbfmin),
+@@ -XXX,XX +XXX,XX @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
+     MULTI_EXT_CFG_BOOL("zfh", ext_zfh, false),
+     MULTI_EXT_CFG_BOOL("zfhmin", ext_zfhmin, false),
+     MULTI_EXT_CFG_BOOL("zve32f", ext_zve32f, false),
++    MULTI_EXT_CFG_BOOL("zve32x", ext_zve32x, false),
+     MULTI_EXT_CFG_BOOL("zve64f", ext_zve64f, false),
+     MULTI_EXT_CFG_BOOL("zve64d", ext_zve64d, false),
+     MULTI_EXT_CFG_BOOL("zvfbfmin", ext_zvfbfmin, false),
+diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/cpu_helper.c
++++ b/target/riscv/cpu_helper.c
+@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
+     *pc = env->xl == MXL_RV32 ? env->pc & UINT32_MAX : env->pc;
+     *cs_base = 0;
+-    if (cpu->cfg.ext_zve32f) {
++    if (cpu->cfg.ext_zve32x) {
+         /*
+          * If env->vl equals to VLMAX, we can use generic vector operation
+          * expanders (GVEC) to accerlate the vector operations.
+diff --git a/target/riscv/csr.c b/target/riscv/csr.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/csr.c
++++ b/target/riscv/csr.c
+@@ -XXX,XX +XXX,XX @@ static RISCVException fs(CPURISCVState *env, int csrno)
+ static RISCVException vs(CPURISCVState *env, int csrno)
+ {
+-    if (riscv_cpu_cfg(env)->ext_zve32f) {
++    if (riscv_cpu_cfg(env)->ext_zve32x) {
+ #if !defined(CONFIG_USER_ONLY)
+         if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
+             return RISCV_EXCP_ILLEGAL_INST;
+diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/tcg/tcg-cpu.c
++++ b/target/riscv/tcg/tcg-cpu.c
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
+         return;
+     }
+-    if (cpu->cfg.ext_zve32f && !riscv_has_ext(env, RVF)) {
+-        error_setg(errp, "Zve32f/Zve64f extensions require F extension");
+-        return;
++    /* The Zve32f extension depends on the Zve32x extension */
++    if (cpu->cfg.ext_zve32f) {
++        if (!riscv_has_ext(env, RVF)) {
++            error_setg(errp, "Zve32f/Zve64f extensions require F extension");
++            return;
++        }
++        cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve32x), true);
+     }
+     if (cpu->cfg.ext_zvfh) {
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
+         cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zvbc), true);
+     }
+-    /*
+-     * In principle Zve*x would also suffice here, were they supported
+-     * in qemu
+-     */
+     if ((cpu->cfg.ext_zvbb || cpu->cfg.ext_zvkb || cpu->cfg.ext_zvkg ||
+          cpu->cfg.ext_zvkned || cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksed ||
+-         cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32f) {
++         cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32x) {
+         error_setg(errp,
+                    "Vector crypto extensions require V or Zve* extensions");
+         return;
+diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/insn_trans/trans_rvv.c.inc
++++ b/target/riscv/insn_trans/trans_rvv.c.inc
+@@ -XXX,XX +XXX,XX @@ static bool do_vsetvl(DisasContext *s, int rd, int rs1, TCGv s2)
+ {
+     TCGv s1, dst;
+-    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32f) {
++    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32x) {
+         return false;
+     }
+@@ -XXX,XX +XXX,XX @@ static bool do_vsetivli(DisasContext *s, int rd, TCGv s1, TCGv s2)
+ {
+     TCGv dst;
+-    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32f) {
++    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32x) {
+         return false;
+     }
+--
+.45.1

-New patch
+[PULL 11/28] target/riscv: Add support for Zve64x extension
+From: Jason Chien <jason.chien@sifive.com>
+Add support for Zve64x extension. Enabling Zve64f enables Zve64x and
+enabling Zve64x enables Zve32x according to their dependency.
+Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2107
+Signed-off-by: Jason Chien <jason.chien@sifive.com>
+Reviewed-by: Frank Chang <frank.chang@sifive.com>
+Reviewed-by: Max Chou <max.chou@sifive.com>
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Message-ID: <20240328022343.6871-3-jason.chien@sifive.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/cpu_cfg.h     |  1 +
+ target/riscv/cpu.c         |  2 ++
+ target/riscv/tcg/tcg-cpu.c | 17 +++++++++++------
+files changed, 14 insertions(+), 6 deletions(-)
+diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/cpu_cfg.h
++++ b/target/riscv/cpu_cfg.h
+@@ -XXX,XX +XXX,XX @@ struct RISCVCPUConfig {
+     bool ext_zve32x;
+     bool ext_zve64f;
+     bool ext_zve64d;
++    bool ext_zve64x;
+     bool ext_zvbb;
+     bool ext_zvbc;
+     bool ext_zvkb;
+diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/cpu.c
++++ b/target/riscv/cpu.c
+@@ -XXX,XX +XXX,XX @@ const RISCVIsaExtData isa_edata_arr[] = {
+     ISA_EXT_DATA_ENTRY(zve32x, PRIV_VERSION_1_10_0, ext_zve32x),
+     ISA_EXT_DATA_ENTRY(zve64f, PRIV_VERSION_1_10_0, ext_zve64f),
+     ISA_EXT_DATA_ENTRY(zve64d, PRIV_VERSION_1_10_0, ext_zve64d),
++    ISA_EXT_DATA_ENTRY(zve64x, PRIV_VERSION_1_10_0, ext_zve64x),
+     ISA_EXT_DATA_ENTRY(zvfbfmin, PRIV_VERSION_1_12_0, ext_zvfbfmin),
+     ISA_EXT_DATA_ENTRY(zvfbfwma, PRIV_VERSION_1_12_0, ext_zvfbfwma),
+     ISA_EXT_DATA_ENTRY(zvfh, PRIV_VERSION_1_12_0, ext_zvfh),
+@@ -XXX,XX +XXX,XX @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
+     MULTI_EXT_CFG_BOOL("zve32x", ext_zve32x, false),
+     MULTI_EXT_CFG_BOOL("zve64f", ext_zve64f, false),
+     MULTI_EXT_CFG_BOOL("zve64d", ext_zve64d, false),
++    MULTI_EXT_CFG_BOOL("zve64x", ext_zve64x, false),
+     MULTI_EXT_CFG_BOOL("zvfbfmin", ext_zvfbfmin, false),
+     MULTI_EXT_CFG_BOOL("zvfbfwma", ext_zvfbfwma, false),
+     MULTI_EXT_CFG_BOOL("zvfh", ext_zvfh, false),
+diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/tcg/tcg-cpu.c
++++ b/target/riscv/tcg/tcg-cpu.c
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
+     /* The Zve64d extension depends on the Zve64f extension */
+     if (cpu->cfg.ext_zve64d) {
++        if (!riscv_has_ext(env, RVD)) {
++            error_setg(errp, "Zve64d/V extensions require D extension");
++            return;
++        }
+         cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve64f), true);
+     }
+-    /* The Zve64f extension depends on the Zve32f extension */
++    /* The Zve64f extension depends on the Zve64x and Zve32f extensions */
+     if (cpu->cfg.ext_zve64f) {
++        cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve64x), true);
+         cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve32f), true);
+     }
+-    if (cpu->cfg.ext_zve64d && !riscv_has_ext(env, RVD)) {
+-        error_setg(errp, "Zve64d/V extensions require D extension");
+-        return;
++    /* The Zve64x extension depends on the Zve32x extension */
++    if (cpu->cfg.ext_zve64x) {
++        cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve32x), true);
+     }
+     /* The Zve32f extension depends on the Zve32x extension */
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
+         return;
+     }
+-    if ((cpu->cfg.ext_zvbc || cpu->cfg.ext_zvknhb) && !cpu->cfg.ext_zve64f) {
++    if ((cpu->cfg.ext_zvbc || cpu->cfg.ext_zvknhb) && !cpu->cfg.ext_zve64x) {
+         error_setg(
+             errp,
+-            "Zvbc and Zvknhb extensions require V or Zve64{f,d} extensions");
++            "Zvbc and Zvknhb extensions require V or Zve64x extensions");
+         return;
+     }
+--
+.45.1

-New patch
+[PULL 12/28] target/riscv: Relax vector register check in RISCV gdbstub
+From: Jason Chien <jason.chien@sifive.com>
+In current implementation, the gdbstub allows reading vector registers
+only if V extension is supported. However, all vector extensions and
+vector crypto extensions have the vector registers and they all depend
+on Zve32x. The gdbstub should check for Zve32x instead.
+Signed-off-by: Jason Chien <jason.chien@sifive.com>
+Reviewed-by: Frank Chang <frank.chang@sifive.com>
+Reviewed-by: Max Chou <max.chou@sifive.com>
+Message-ID: <20240328022343.6871-4-jason.chien@sifive.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/gdbstub.c | 2 +-
+file changed, 1 insertion(+), 1 deletion(-)
+diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/gdbstub.c
++++ b/target/riscv/gdbstub.c
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_register_gdb_regs_for_features(CPUState *cs)
+                                  gdb_find_static_feature("riscv-32bit-fpu.xml"),
+);
+     }
+-    if (env->misa_ext & RVV) {
++    if (cpu->cfg.ext_zve32x) {
+         gdb_register_coprocessor(cs, riscv_gdb_get_vector,
+                                  riscv_gdb_set_vector,
+                                  ricsv_gen_dynamic_vector_feature(cs, cs->gdb_num_regs),
+--
+.45.1

-[PULL 01/18] hw/riscv: virt: Don't use a macro for the PLIC configuration
+[PULL 13/28] target/riscv: Fix the element agnostic function problem
-From: Alistair Francis <alistair.francis@wdc.com>
+From: Huang Tao <eric.huang@linux.alibaba.com>
-Using a macro for the PLIC configuration doesn't make the code any
+In RVV and vcrypto instructions, the masked and tail elements are set to 1s
-easier to read. Instead it makes it harder to figure out what is going
+using vext_set_elems_1s function if the vma/vta bit is set. It is the element
-on, so let's remove it.
+agnostic policy.
+However, this function can't deal the big endian situation. This patch fixes
+the problem by adding handling of such case.
+Signed-off-by: Huang Tao <eric.huang@linux.alibaba.com>
+Suggested-by: Richard Henderson <richard.henderson@linaro.org>
+Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240325021654.6594-1-eric.huang@linux.alibaba.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
-Message-id: 20211022060133.3045020-1-alistair.francis@opensource.wdc.com
 ---
- include/hw/riscv/virt.h | 1 -
+ target/riscv/vector_internals.c | 22 ++++++++++++++++++++++
- hw/riscv/virt.c         | 2 +-
+file changed, 22 insertions(+)
 files changed, 1 insertion(+), 2 deletions(-)
-diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
+diff --git a/target/riscv/vector_internals.c b/target/riscv/vector_internals.c
 index XXXXXXX..XXXXXXX 100644
---- a/include/hw/riscv/virt.h
+--- a/target/riscv/vector_internals.c
-+++ b/include/hw/riscv/virt.h
++++ b/target/riscv/vector_internals.c
-@@ -XXX,XX +XXX,XX @@ enum {
+@@ -XXX,XX +XXX,XX @@ void vext_set_elems_1s(void *base, uint32_t is_agnostic, uint32_t cnt,
-     VIRTIO_NDEV = 0x35 /* Arbitrary maximum number of interrupts */
+     if (tot - cnt == 0) {
- };
+         return ;
 -#define VIRT_PLIC_HART_CONFIG "MS"
  #define VIRT_PLIC_NUM_SOURCES 127
  #define VIRT_PLIC_NUM_PRIORITIES 7
  #define VIRT_PLIC_PRIORITY_BASE 0x04
 diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
 index XXXXXXX..XXXXXXX 100644
 --- a/hw/riscv/virt.c
 +++ b/hw/riscv/virt.c
@@ -XXX,XX +XXX,XX @@ static char *plic_hart_config_string(int hart_count)
      int i;
      for (i = 0; i < hart_count; i++) {
 -        vals[i] = VIRT_PLIC_HART_CONFIG;
 +        vals[i] = "MS";
      }
-     vals[i] = NULL;
++
 +    if (HOST_BIG_ENDIAN) {
 +        /*
 +         * Deal the situation when the elements are insdie
 +         * only one uint64 block including setting the
 +         * masked-off element.
 +         */
 +        if (((tot - 1) ^ cnt) < 8) {
 +            memset(base + H1(tot - 1), -1, tot - cnt);
 +            return;
 +        }
 +        /*
 +         * Otherwise, at least cross two uint64_t blocks.
 +         * Set first unaligned block.
 +         */
 +        if (cnt % 8 != 0) {
 +            uint32_t j = ROUND_UP(cnt, 8);
 +            memset(base + H1(j - 1), -1, j - cnt);
 +            cnt = j;
 +        }
 +        /* Set other 64bit aligend blocks */
 +    }
      memset(base + cnt, -1, tot - cnt);
  }
 --
-.31.1
+.45.1

-[PULL 14/18] target/riscv: Allow experimental J-ext to be turned on
+[PULL 14/28] target/riscv/cpu.c: fix Zvkb extension config
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Yangyu Chen <cyy@cyyself.name>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+This code has a typo that writes zvkb to zvkg, causing users can't
 enable zvkb through the config. This patch gets this fixed.
 Signed-off-by: Yangyu Chen <cyy@cyyself.name>
 Fixes: ea61ef7097d0 ("target/riscv: Move vector crypto extensions to riscv_cpu_extensions")
 Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
+Reviewed-by: Max Chou <max.chou@sifive.com>
-Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Reviewed-by:  Weiwei Li <liwei1518@gmail.com>
-Message-id: 20211025173609.2724490-9-space.monkey.delivers@gmail.com
+Message-ID: <tencent_7E34EEF0F90B9A68BF38BEE09EC6D4877C0A@qq.com>
 Cc: qemu-stable <qemu-stable@nongnu.org>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu.c | 4 ++++
+ target/riscv/cpu.c | 2 +-
-file changed, 4 insertions(+)
+file changed, 1 insertion(+), 1 deletion(-)
 diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.c
 +++ b/target/riscv/cpu.c
-@@ -XXX,XX +XXX,XX @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
+@@ -XXX,XX +XXX,XX @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
-             }
+     /* Vector cryptography extensions */
-             set_vext_version(env, vext_version);
+     MULTI_EXT_CFG_BOOL("zvbb", ext_zvbb, false),
-         }
+     MULTI_EXT_CFG_BOOL("zvbc", ext_zvbc, false),
-+        if (cpu->cfg.ext_j) {
+-    MULTI_EXT_CFG_BOOL("zvkb", ext_zvkg, false),
-+            ext |= RVJ;
++    MULTI_EXT_CFG_BOOL("zvkb", ext_zvkb, false),
-+        }
+     MULTI_EXT_CFG_BOOL("zvkg", ext_zvkg, false),
+     MULTI_EXT_CFG_BOOL("zvkned", ext_zvkned, false),
-         set_misa(env, env->misa_mxl, ext);
+     MULTI_EXT_CFG_BOOL("zvknha", ext_zvknha, false),
      }
@@ -XXX,XX +XXX,XX @@ static Property riscv_cpu_properties[] = {
      DEFINE_PROP_BOOL("x-zbc", RISCVCPU, cfg.ext_zbc, false),
      DEFINE_PROP_BOOL("x-zbs", RISCVCPU, cfg.ext_zbs, false),
      DEFINE_PROP_BOOL("x-h", RISCVCPU, cfg.ext_h, false),
 +    DEFINE_PROP_BOOL("x-j", RISCVCPU, cfg.ext_j, false),
      DEFINE_PROP_BOOL("x-v", RISCVCPU, cfg.ext_v, false),
      DEFINE_PROP_STRING("vext_spec", RISCVCPU, cfg.vext_spec),
      DEFINE_PROP_UINT16("vlen", RISCVCPU, cfg.vlen, 128),
 --
-.31.1
+.45.1

-[PULL 13/18] target/riscv: Implement address masking functions required for RISC-V Pointer Masking extension
+[PULL 15/28] target/riscv: Implement dynamic establishment of custom decoder
-From: Anatoly Parshintsev <kupokupokupopo@gmail.com>
+From: Huang Tao <eric.huang@linux.alibaba.com>
-Signed-off-by: Anatoly Parshintsev <kupokupokupopo@gmail.com>
+In this patch, we modify the decoder to be a freely composable data
 structure instead of a hardcoded one. It can be dynamically builded up
 according to the extensions.
 This approach has several benefits:
 . Provides support for heterogeneous cpu architectures. As we add decoder in
    RISCVCPU, each cpu can have their own decoder, and the decoders can be
    different due to cpu's features.
 . Improve the decoding efficiency. We run the guard_func to see if the decoder
    can be added to the dynamic_decoder when building up the decoder. Therefore,
    there is no need to run the guard_func when decoding each instruction. It can
    improve the decoding efficiency
 . For vendor or dynamic cpus, it allows them to customize their own decoder
    functions to improve decoding efficiency, especially when vendor-defined
    instruction sets increase. Because of dynamic building up, it can skip the other
    decoder guard functions when decoding.
 . Pre patch for allowing adding a vendor decoder before decode_insn32() with minimal
    overhead for users that don't need this particular vendor decoder.
 Signed-off-by: Huang Tao <eric.huang@linux.alibaba.com>
 Suggested-by: Christoph Muellner <christoph.muellner@vrull.eu>
 Co-authored-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
 Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211025173609.2724490-8-space.monkey.delivers@gmail.com
+Message-ID: <20240506023607.29544-1-eric.huang@linux.alibaba.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu.h        |  2 ++
+ target/riscv/cpu.h         |  1 +
- target/riscv/cpu_helper.c | 18 ++++++++++++++++++
+ target/riscv/tcg/tcg-cpu.h | 15 +++++++++++++++
- target/riscv/translate.c  | 39 +++++++++++++++++++++++++++++++++++++--
+ target/riscv/cpu.c         |  1 +
-files changed, 57 insertions(+), 2 deletions(-)
+ target/riscv/tcg/tcg-cpu.c | 15 +++++++++++++++
  target/riscv/translate.c   | 31 +++++++++++++++----------------
 files changed, 47 insertions(+), 16 deletions(-)
 diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.h
 +++ b/target/riscv/cpu.h
-@@ -XXX,XX +XXX,XX @@ FIELD(TB_FLAGS, HLSX, 10, 1)
+@@ -XXX,XX +XXX,XX @@ struct ArchCPU {
- FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
+     uint32_t pmu_avail_ctrs;
- /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */
+     /* Mapping of events to counters */
- FIELD(TB_FLAGS, XL, 13, 2)
+     GHashTable *pmu_event_ctr_map;
-+/* If PointerMasking should be applied */
++    const GPtrArray *decoders;
-+FIELD(TB_FLAGS, PM_ENABLED, 15, 1)
+ };
- #ifdef TARGET_RISCV32
+ /**
- #define riscv_cpu_mxl(env)  ((void)(env), MXL_RV32)
+diff --git a/target/riscv/tcg/tcg-cpu.h b/target/riscv/tcg/tcg-cpu.h
 diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
 index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/cpu_helper.c
+--- a/target/riscv/tcg/tcg-cpu.h
-+++ b/target/riscv/cpu_helper.c
++++ b/target/riscv/tcg/tcg-cpu.h
-@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
+@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp);
-         flags = FIELD_DP32(flags, TB_FLAGS, MSTATUS_HS_FS,
+ void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
-                            get_field(env->mstatus_hs, MSTATUS_FS));
+ bool riscv_cpu_tcg_compatible(RISCVCPU *cpu);
 +struct DisasContext;
 +struct RISCVCPUConfig;
 +typedef struct RISCVDecoder {
 +    bool (*guard_func)(const struct RISCVCPUConfig *);
 +    bool (*riscv_cpu_decode_fn)(struct DisasContext *, uint32_t);
 +} RISCVDecoder;
 +
 +typedef bool (*riscv_cpu_decode_fn)(struct DisasContext *, uint32_t);
 +
 +extern const size_t decoder_table_size;
 +
 +extern const RISCVDecoder decoder_table[];
 +
 +void riscv_tcg_cpu_finalize_dynamic_decoder(RISCVCPU *cpu);
 +
  #endif
 diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.c
 +++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
              error_propagate(errp, local_err);
              return;
          }
 +        riscv_tcg_cpu_finalize_dynamic_decoder(cpu);
      } else if (kvm_enabled()) {
          riscv_kvm_cpu_finalize_features(cpu, &local_err);
          if (local_err != NULL) {
 diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/tcg/tcg-cpu.c
 +++ b/target/riscv/tcg/tcg-cpu.c
@@ -XXX,XX +XXX,XX @@ void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
      }
-+    if (riscv_has_ext(env, RVJ)) {
+ }
-+        int priv = flags & TB_FLAGS_PRIV_MMU_MASK;
-+        bool pm_enabled = false;
++void riscv_tcg_cpu_finalize_dynamic_decoder(RISCVCPU *cpu)
-+        switch (priv) {
++{
-+        case PRV_U:
++    GPtrArray *dynamic_decoders;
-+            pm_enabled = env->mmte & U_PM_ENABLE;
++    dynamic_decoders = g_ptr_array_sized_new(decoder_table_size);
-+            break;
++    for (size_t i = 0; i < decoder_table_size; ++i) {
-+        case PRV_S:
++        if (decoder_table[i].guard_func &&
-+            pm_enabled = env->mmte & S_PM_ENABLE;
++            decoder_table[i].guard_func(&cpu->cfg)) {
-+            break;
++            g_ptr_array_add(dynamic_decoders,
-+        case PRV_M:
++                            (gpointer)decoder_table[i].riscv_cpu_decode_fn);
 +            pm_enabled = env->mmte & M_PM_ENABLE;
 +            break;
 +        default:
 +            g_assert_not_reached();
 +        }
-+        flags = FIELD_DP32(flags, TB_FLAGS, PM_ENABLED, pm_enabled);
 +    }
- #endif
++
++    cpu->decoders = dynamic_decoders;
-     flags = FIELD_DP32(flags, TB_FLAGS, XL, cpu_get_xl(env));
++}
 +
  bool riscv_cpu_tcg_compatible(RISCVCPU *cpu)
  {
      return object_dynamic_cast(OBJECT(cpu), TYPE_RISCV_CPU_HOST) == NULL;
 diff --git a/target/riscv/translate.c b/target/riscv/translate.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/translate.c
 +++ b/target/riscv/translate.c
-@@ -XXX,XX +XXX,XX @@ static TCGv cpu_gpr[32], cpu_pc, cpu_vl;
+@@ -XXX,XX +XXX,XX @@
  #include "exec/helper-info.c.inc"
  #undef  HELPER_H
 +#include "tcg/tcg-cpu.h"
 +
  /* global register indices */
  static TCGv cpu_gpr[32], cpu_gprh[32], cpu_pc, cpu_vl, cpu_vstart;
  static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */
- static TCGv load_res;
- static TCGv load_val;
-+/* globals for PM CSRs */
-+static TCGv pm_mask[4];
-+static TCGv pm_base[4];
- #include "exec/gen-icount.h"
 @@ -XXX,XX +XXX,XX @@ typedef struct DisasContext {
-     TCGv zero;
+     /* FRM is known to contain a valid value. */
-     /* Space for 3 operands plus 1 extra for address computation. */
+     bool frm_valid;
-     TCGv temp[4];
+     bool insn_start_updated;
-+    /* PointerMasking extension */
++    const GPtrArray *decoders;
 +    bool pm_enabled;
 +    TCGv pm_mask;
 +    TCGv pm_base;
  } DisasContext;
  static inline bool has_ext(DisasContext *ctx, uint32_t ext)
-@@ -XXX,XX +XXX,XX @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong imm)
+@@ -XXX,XX +XXX,XX @@ static inline int insn_len(uint16_t first_word)
      return (first_word & 3) == 3 ? 4 : 2;
  }
- /*
++const RISCVDecoder decoder_table[] = {
-- * Temp stub: generates address adjustment for PointerMasking
++    { always_true_p, decode_insn32 },
-+ * Generates address adjustment for PointerMasking
++    { has_xthead_p, decode_xthead},
-  */
++    { has_XVentanaCondOps_p, decode_XVentanaCodeOps},
- static TCGv gen_pm_adjust_address(DisasContext *s, TCGv src)
++};
 +
 +const size_t decoder_table_size = ARRAY_SIZE(decoder_table);
 +
  static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode)
  {
--    return src;
+-    /*
-+    TCGv temp;
+-     * A table with predicate (i.e., guard) functions and decoder functions
-+    if (!s->pm_enabled) {
+-     * that are tested in-order until a decoder matches onto the opcode.
-+        /* Load unmodified address */
+-     */
-+        return src;
+-    static const struct {
-+    } else {
+-        bool (*guard_func)(const RISCVCPUConfig *);
-+        temp = temp_new(s);
+-        bool (*decode_func)(DisasContext *, uint32_t);
-+        tcg_gen_andc_tl(temp, src, s->pm_mask);
+-    } decoders[] = {
-+        tcg_gen_or_tl(temp, temp, s->pm_base);
+-        { always_true_p,  decode_insn32 },
-+        return temp;
+-        { has_xthead_p, decode_xthead },
-+    }
+-        { has_XVentanaCondOps_p,  decode_XVentanaCodeOps },
 -    };
 -
      ctx->virt_inst_excp = false;
      ctx->cur_insn_len = insn_len(opcode);
      /* Check for compressed insn */
@@ -XXX,XX +XXX,XX @@ static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode)
                                               ctx->base.pc_next + 2));
          ctx->opcode = opcode32;
 -        for (size_t i = 0; i < ARRAY_SIZE(decoders); ++i) {
 -            if (decoders[i].guard_func(ctx->cfg_ptr) &&
 -                decoders[i].decode_func(ctx, opcode32)) {
 +        for (guint i = 0; i < ctx->decoders->len; ++i) {
 +            riscv_cpu_decode_fn func = g_ptr_array_index(ctx->decoders, i);
 +            if (func(ctx, opcode32)) {
                  return;
              }
          }
@@ -XXX,XX +XXX,XX @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
      ctx->itrigger = FIELD_EX32(tb_flags, TB_FLAGS, ITRIGGER);
      ctx->zero = tcg_constant_tl(0);
      ctx->virt_inst_excp = false;
 +    ctx->decoders = cpu->decoders;
  }
- #ifndef CONFIG_USER_ONLY
+ static void riscv_tr_tb_start(DisasContextBase *db, CPUState *cpu)
@@ -XXX,XX +XXX,XX @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
      ctx->cs = cs;
      ctx->ntemp = 0;
      memset(ctx->temp, 0, sizeof(ctx->temp));
 +    ctx->pm_enabled = FIELD_EX32(tb_flags, TB_FLAGS, PM_ENABLED);
 +    int priv = tb_flags & TB_FLAGS_PRIV_MMU_MASK;
 +    ctx->pm_mask = pm_mask[priv];
 +    ctx->pm_base = pm_base[priv];
      ctx->zero = tcg_constant_tl(0);
  }
@@ -XXX,XX +XXX,XX @@ void riscv_translate_init(void)
                               "load_res");
      load_val = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_val),
                               "load_val");
 +#ifndef CONFIG_USER_ONLY
 +    /* Assign PM CSRs to tcg globals */
 +    pm_mask[PRV_U] =
 +      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmmask), "upmmask");
 +    pm_base[PRV_U] =
 +      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmbase), "upmbase");
 +    pm_mask[PRV_S] =
 +      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmmask), "spmmask");
 +    pm_base[PRV_S] =
 +      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmbase), "spmbase");
 +    pm_mask[PRV_M] =
 +      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmmask), "mpmmask");
 +    pm_base[PRV_M] =
 +      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmbase), "mpmbase");
 +#endif
  }
 --
-.31.1
+.45.1

-[PULL 10/18] target/riscv: Add J extension state description
+[PULL 16/28] riscv: thead: Add th.sxstatus CSR emulation
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Christoph Müllner <christoph.muellner@vrull.eu>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+The th.sxstatus CSR can be used to identify available custom extension
 on T-Head CPUs. The CSR is documented here:
   https://github.com/T-head-Semi/thead-extension-spec/blob/master/xtheadsxstatus.adoc
 An important property of this patch is, that the th.sxstatus MAEE field
 is not set (indicating that XTheadMae is not available).
 XTheadMae is a memory attribute extension (similar to Svpbmt) which is
 implemented in many T-Head CPUs (C906, C910, etc.) and utilizes bits
 in PTEs that are marked as reserved. QEMU maintainers prefer to not
 implement XTheadMae, so we need give kernels a mechanism to identify
 if XTheadMae is available in a system or not. And this patch introduces
 this mechanism in QEMU in a way that's compatible with real HW
 (i.e., probing the th.sxstatus.MAEE bit).
 Further context can be found on the list:
 https://lists.gnu.org/archive/html/qemu-devel/2024-02/msg00775.html
 Reviewed-by: LIU Zhiwei <zhiwe_liu@linux.alibaba.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211025173609.2724490-5-space.monkey.delivers@gmail.com
+Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
 Message-ID: <20240429073656.2486732-1-christoph.muellner@vrull.eu>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/machine.c | 27 +++++++++++++++++++++++++++
+ MAINTAINERS              |  1 +
-file changed, 27 insertions(+)
+ target/riscv/cpu.h       |  3 ++
  target/riscv/cpu.c       |  1 +
  target/riscv/th_csr.c    | 79 ++++++++++++++++++++++++++++++++++++++++
  target/riscv/meson.build |  1 +
 files changed, 85 insertions(+)
  create mode 100644 target/riscv/th_csr.c
-diff --git a/target/riscv/machine.c b/target/riscv/machine.c
+diff --git a/MAINTAINERS b/MAINTAINERS
 index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/machine.c
+--- a/MAINTAINERS
-+++ b/target/riscv/machine.c
++++ b/MAINTAINERS
-@@ -XXX,XX +XXX,XX @@ static bool vector_needed(void *opaque)
+@@ -XXX,XX +XXX,XX @@ L: qemu-riscv@nongnu.org
-     return riscv_has_ext(env, RVV);
+ S: Supported
- }
+ F: target/riscv/insn_trans/trans_xthead.c.inc
+ F: target/riscv/xthead*.decode
-+static bool pointermasking_needed(void *opaque)
++F: target/riscv/th_*
  F: disas/riscv-xthead*
  RISC-V XVentanaCondOps extension
 diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.h
 +++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ target_ulong riscv_new_csr_seed(target_ulong new_value,
  uint8_t satp_mode_max_from_map(uint32_t map);
  const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
 +/* Implemented in th_csr.c */
 +void th_register_custom_csrs(RISCVCPU *cpu);
 +
  #endif /* RISCV_CPU_H */
 diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.c
 +++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ static void rv64_thead_c906_cpu_init(Object *obj)
      cpu->cfg.mvendorid = THEAD_VENDOR_ID;
  #ifndef CONFIG_USER_ONLY
      set_satp_mode_max_supported(cpu, VM_1_10_SV39);
 +    th_register_custom_csrs(cpu);
  #endif
      /* inherited from parent obj via riscv_cpu_init() */
 diff --git a/target/riscv/th_csr.c b/target/riscv/th_csr.c
 new file mode 100644
 index XXXXXXX..XXXXXXX
 --- /dev/null
 +++ b/target/riscv/th_csr.c
@@ -XXX,XX +XXX,XX @@
 +/*
 + * T-Head-specific CSRs.
 + *
 + * Copyright (c) 2024 VRULL GmbH
 + *
 + * This program is free software; you can redistribute it and/or modify it
 + * under the terms and conditions of the GNU General Public License,
 + * version 2 or later, as published by the Free Software Foundation.
 + *
 + * This program is distributed in the hope it will be useful, but WITHOUT
 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 + * more details.
 + *
 + * You should have received a copy of the GNU General Public License along with
 + * this program.  If not, see <http://www.gnu.org/licenses/>.
 + */
 +
 +#include "qemu/osdep.h"
 +#include "cpu.h"
 +#include "cpu_vendorid.h"
 +
 +#define CSR_TH_SXSTATUS 0x5c0
 +
 +/* TH_SXSTATUS bits */
 +#define TH_SXSTATUS_UCME        BIT(16)
 +#define TH_SXSTATUS_MAEE        BIT(21)
 +#define TH_SXSTATUS_THEADISAEE  BIT(22)
 +
 +typedef struct {
 +    int csrno;
 +    int (*insertion_test)(RISCVCPU *cpu);
 +    riscv_csr_operations csr_ops;
 +} riscv_csr;
 +
 +static RISCVException smode(CPURISCVState *env, int csrno)
 +{
-+    RISCVCPU *cpu = opaque;
++    if (riscv_has_ext(env, RVS)) {
-+    CPURISCVState *env = &cpu->env;
++        return RISCV_EXCP_NONE;
 +    }
 +
-+    return riscv_has_ext(env, RVJ);
++    return RISCV_EXCP_ILLEGAL_INST;
 +}
 +
- static const VMStateDescription vmstate_vector = {
++static int test_thead_mvendorid(RISCVCPU *cpu)
-     .name = "cpu/vector",
++{
-     .version_id = 1,
++    if (cpu->cfg.mvendorid != THEAD_VENDOR_ID) {
-@@ -XXX,XX +XXX,XX @@ static const VMStateDescription vmstate_vector = {
++        return -1;
-         }
++    }
  };
 +static const VMStateDescription vmstate_pointermasking = {
 +    .name = "cpu/pointer_masking",
 +    .version_id = 1,
 +    .minimum_version_id = 1,
 +    .needed = pointermasking_needed,
 +    .fields = (VMStateField[]) {
 +        VMSTATE_UINTTL(env.mmte, RISCVCPU),
 +        VMSTATE_UINTTL(env.mpmmask, RISCVCPU),
 +        VMSTATE_UINTTL(env.mpmbase, RISCVCPU),
 +        VMSTATE_UINTTL(env.spmmask, RISCVCPU),
 +        VMSTATE_UINTTL(env.spmbase, RISCVCPU),
 +        VMSTATE_UINTTL(env.upmmask, RISCVCPU),
 +        VMSTATE_UINTTL(env.upmbase, RISCVCPU),
 +
-+        VMSTATE_END_OF_LIST()
++    return 0;
 +}
 +
 +static RISCVException read_th_sxstatus(CPURISCVState *env, int csrno,
 +                                       target_ulong *val)
 +{
 +    /* We don't set MAEE here, because QEMU does not implement MAEE. */
 +    *val = TH_SXSTATUS_UCME | TH_SXSTATUS_THEADISAEE;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static riscv_csr th_csr_list[] = {
 +    {
 +        .csrno = CSR_TH_SXSTATUS,
 +        .insertion_test = test_thead_mvendorid,
 +        .csr_ops = { "th.sxstatus", smode, read_th_sxstatus }
 +    }
 +};
 +
- static const VMStateDescription vmstate_hyper = {
++void th_register_custom_csrs(RISCVCPU *cpu)
-     .name = "cpu/hyper",
++{
-     .version_id = 1,
++    for (size_t i = 0; i < ARRAY_SIZE(th_csr_list); i++) {
-@@ -XXX,XX +XXX,XX @@ const VMStateDescription vmstate_riscv_cpu = {
++        int csrno = th_csr_list[i].csrno;
-         &vmstate_pmp,
++        riscv_csr_operations *csr_ops = &th_csr_list[i].csr_ops;
-         &vmstate_hyper,
++        if (!th_csr_list[i].insertion_test(cpu)) {
-         &vmstate_vector,
++            riscv_set_csr_ops(csrno, csr_ops);
-+        &vmstate_pointermasking,
++        }
-         NULL
++    }
-     }
++}
- };
+diff --git a/target/riscv/meson.build b/target/riscv/meson.build
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/meson.build
 +++ b/target/riscv/meson.build
@@ -XXX,XX +XXX,XX @@ riscv_system_ss.add(files(
    'monitor.c',
    'machine.c',
    'pmu.c',
 +  'th_csr.c',
    'time_helper.c',
    'riscv-qmp-cmds.c',
  ))
 --
-.31.1
+.45.1

-[PULL 15/18] softfloat: add APIs to handle alternative sNaN propagation for fmax/fmin
+[PULL 17/28] target/riscv: rvv: Fix Zvfhmin checking for vfwcvt.f.f.v and vfncvt.f.f.w instructions
-From: Chih-Min Chao <chihmin.chao@sifive.com>
+From: Max Chou <max.chou@sifive.com>
-For "fmax/fmin ft0, ft1, ft2" and if one of the inputs is sNaN,
+According v spec 18.4, only the vfwcvt.f.f.v and vfncvt.f.f.w
 instructions will be affected by Zvfhmin extension.
 And the vfwcvt.f.f.v and vfncvt.f.f.w instructions only support the
 conversions of
-  The original logic:
+* From 1*SEW(16/32) to 2*SEW(32/64)
-    Return NaN and set invalid flag if ft1 == sNaN || ft2 == sNan.
+* From 2*SEW(32/64) to 1*SEW(16/32)
-  The alternative path:
+Signed-off-by: Max Chou <max.chou@sifive.com>
-    Set invalid flag if ft1 == sNaN || ft2 == sNaN.
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
-    Return NaN only if ft1 == NaN && ft2 == NaN.
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240322092600.1198921-2-max.chou@sifive.com>
 The IEEE 754 spec allows both implementation and some architecture such
 as riscv choose different defintions in two spec versions.
 (riscv-spec-v2.2 use original version, riscv-spec-20191213 changes to
  alternative)
 Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
 Signed-off-by: Frank Chang <frank.chang@sifive.com>
 Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
 Message-id: 20211016085428.3001501-2-frank.chang@sifive.com
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- include/fpu/softfloat.h   | 10 ++++++++++
+ target/riscv/insn_trans/trans_rvv.c.inc | 20 ++++++++++++++++++--
- fpu/softfloat.c           | 19 +++++++++++++------
+file changed, 18 insertions(+), 2 deletions(-)
  fpu/softfloat-parts.c.inc | 25 +++++++++++++++++++++++--
 files changed, 46 insertions(+), 8 deletions(-)
-diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
+diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
 index XXXXXXX..XXXXXXX 100644
---- a/include/fpu/softfloat.h
+--- a/target/riscv/insn_trans/trans_rvv.c.inc
-+++ b/include/fpu/softfloat.h
++++ b/target/riscv/insn_trans/trans_rvv.c.inc
-@@ -XXX,XX +XXX,XX @@ float16 float16_minnum(float16, float16, float_status *status);
+@@ -XXX,XX +XXX,XX @@ static bool require_rvf(DisasContext *s)
- float16 float16_maxnum(float16, float16, float_status *status);
+     }
- float16 float16_minnummag(float16, float16, float_status *status);
+ }
- float16 float16_maxnummag(float16, float16, float_status *status);
-+float16 float16_minimum_number(float16, float16, float_status *status);
++static bool require_rvfmin(DisasContext *s)
-+float16 float16_maximum_number(float16, float16, float_status *status);
++{
- float16 float16_sqrt(float16, float_status *status);
++    if (s->mstatus_fs == EXT_STATUS_DISABLED) {
- FloatRelation float16_compare(float16, float16, float_status *status);
++        return false;
- FloatRelation float16_compare_quiet(float16, float16, float_status *status);
++    }
@@ -XXX,XX +XXX,XX @@ bfloat16 bfloat16_minnum(bfloat16, bfloat16, float_status *status);
  bfloat16 bfloat16_maxnum(bfloat16, bfloat16, float_status *status);
  bfloat16 bfloat16_minnummag(bfloat16, bfloat16, float_status *status);
  bfloat16 bfloat16_maxnummag(bfloat16, bfloat16, float_status *status);
 +bfloat16 bfloat16_minimum_number(bfloat16, bfloat16, float_status *status);
 +bfloat16 bfloat16_maximum_number(bfloat16, bfloat16, float_status *status);
  bfloat16 bfloat16_sqrt(bfloat16, float_status *status);
  FloatRelation bfloat16_compare(bfloat16, bfloat16, float_status *status);
  FloatRelation bfloat16_compare_quiet(bfloat16, bfloat16, float_status *status);
@@ -XXX,XX +XXX,XX @@ float32 float32_minnum(float32, float32, float_status *status);
  float32 float32_maxnum(float32, float32, float_status *status);
  float32 float32_minnummag(float32, float32, float_status *status);
  float32 float32_maxnummag(float32, float32, float_status *status);
 +float32 float32_minimum_number(float32, float32, float_status *status);
 +float32 float32_maximum_number(float32, float32, float_status *status);
  bool float32_is_quiet_nan(float32, float_status *status);
  bool float32_is_signaling_nan(float32, float_status *status);
  float32 float32_silence_nan(float32, float_status *status);
@@ -XXX,XX +XXX,XX @@ float64 float64_minnum(float64, float64, float_status *status);
  float64 float64_maxnum(float64, float64, float_status *status);
  float64 float64_minnummag(float64, float64, float_status *status);
  float64 float64_maxnummag(float64, float64, float_status *status);
 +float64 float64_minimum_number(float64, float64, float_status *status);
 +float64 float64_maximum_number(float64, float64, float_status *status);
  bool float64_is_quiet_nan(float64 a, float_status *status);
  bool float64_is_signaling_nan(float64, float_status *status);
  float64 float64_silence_nan(float64, float_status *status);
@@ -XXX,XX +XXX,XX @@ float128 float128_minnum(float128, float128, float_status *status);
  float128 float128_maxnum(float128, float128, float_status *status);
  float128 float128_minnummag(float128, float128, float_status *status);
  float128 float128_maxnummag(float128, float128, float_status *status);
 +float128 float128_minimum_number(float128, float128, float_status *status);
 +float128 float128_maximum_number(float128, float128, float_status *status);
  bool float128_is_quiet_nan(float128, float_status *status);
  bool float128_is_signaling_nan(float128, float_status *status);
  float128 float128_silence_nan(float128, float_status *status);
 diff --git a/fpu/softfloat.c b/fpu/softfloat.c
 index XXXXXXX..XXXXXXX 100644
 --- a/fpu/softfloat.c
 +++ b/fpu/softfloat.c
@@ -XXX,XX +XXX,XX @@ enum {
      minmax_isnum = 2,
      /* Set for the IEEE 754-2008 minNumMag() and minNumMag() operations. */
      minmax_ismag = 4,
 +    /*
 +     * Set for the IEEE 754-2019 minimumNumber() and maximumNumber()
 +     * operations.
 +     */
 +    minmax_isnumber = 8,
  };
  /* Simple helpers for checking if, or what kind of, NaN we have */
@@ -XXX,XX +XXX,XX @@ static float128 float128_minmax(float128 a, float128 b,
      { return type##_minmax(a, b, s, flags); }
  #define MINMAX_2(type) \
 -    MINMAX_1(type, max, 0)                                      \
 -    MINMAX_1(type, maxnum, minmax_isnum)                        \
 -    MINMAX_1(type, maxnummag, minmax_isnum | minmax_ismag)      \
 -    MINMAX_1(type, min, minmax_ismin)                           \
 -    MINMAX_1(type, minnum, minmax_ismin | minmax_isnum)         \
 -    MINMAX_1(type, minnummag, minmax_ismin | minmax_isnum | minmax_ismag)
 +    MINMAX_1(type, max, 0)                                                \
 +    MINMAX_1(type, maxnum, minmax_isnum)                                  \
 +    MINMAX_1(type, maxnummag, minmax_isnum | minmax_ismag)                \
 +    MINMAX_1(type, maximum_number, minmax_isnumber)                       \
 +    MINMAX_1(type, min, minmax_ismin)                                     \
 +    MINMAX_1(type, minnum, minmax_ismin | minmax_isnum)                   \
 +    MINMAX_1(type, minnummag, minmax_ismin | minmax_isnum | minmax_ismag) \
 +    MINMAX_1(type, minimum_number, minmax_ismin | minmax_isnumber)        \
  MINMAX_2(float16)
  MINMAX_2(bfloat16)
 diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc
 index XXXXXXX..XXXXXXX 100644
 --- a/fpu/softfloat-parts.c.inc
 +++ b/fpu/softfloat-parts.c.inc
@@ -XXX,XX +XXX,XX @@ static FloatPartsN *partsN(minmax)(FloatPartsN *a, FloatPartsN *b,
      if (unlikely(ab_mask & float_cmask_anynan)) {
          /*
 -         * For minnum/maxnum, if one operand is a QNaN, and the other
 +         * For minNum/maxNum (IEEE 754-2008)
 +         * or minimumNumber/maximumNumber (IEEE 754-2019),
 +         * if one operand is a QNaN, and the other
           * operand is numerical, then return numerical argument.
           */
 -        if ((flags & minmax_isnum)
 +        if ((flags & (minmax_isnum | minmax_isnumber))
              && !(ab_mask & float_cmask_snan)
              && (ab_mask & ~float_cmask_qnan)) {
              return is_nan(a->cls) ? b : a;
          }
 +
-+        /*
++    switch (s->sew) {
-+         * In IEEE 754-2019, minNum, maxNum, minNumMag and maxNumMag
++    case MO_16:
-+         * are removed and replaced with minimum, minimumNumber, maximum
++        return s->cfg_ptr->ext_zvfhmin;
-+         * and maximumNumber.
++    case MO_32:
-+         * minimumNumber/maximumNumber behavior for SNaN is changed to:
++        return s->cfg_ptr->ext_zve32f;
-+         *   If both operands are NaNs, a QNaN is returned.
++    default:
-+         *   If either operand is a SNaN,
++        return false;
-+         *   an invalid operation exception is signaled,
++    }
-+         *   but unless both operands are NaNs,
++}
 +         *   the SNaN is otherwise ignored and not converted to a QNaN.
 +         */
 +        if ((flags & minmax_isnumber)
 +            && (ab_mask & float_cmask_snan)
 +            && (ab_mask & ~float_cmask_anynan)) {
 +            float_raise(float_flag_invalid, s);
 +            return is_nan(a->cls) ? b : a;
 +        }
 +
-         return parts_pick_nan(a, b, s);
+ static bool require_scale_rvf(DisasContext *s)
  {
      if (s->mstatus_fs == EXT_STATUS_DISABLED) {
@@ -XXX,XX +XXX,XX @@ static bool require_scale_rvfmin(DisasContext *s)
      }
+     switch (s->sew) {
+-    case MO_8:
+-        return s->cfg_ptr->ext_zvfhmin;
+     case MO_16:
+         return s->cfg_ptr->ext_zve32f;
+     case MO_32:
+@@ -XXX,XX +XXX,XX @@ static bool opxfv_widen_check(DisasContext *s, arg_rmr *a)
+ static bool opffv_widen_check(DisasContext *s, arg_rmr *a)
+ {
+     return opfv_widen_check(s, a) &&
++           require_rvfmin(s) &&
+            require_scale_rvfmin(s) &&
+            (s->sew != MO_8);
+ }
+@@ -XXX,XX +XXX,XX @@ static bool opfxv_narrow_check(DisasContext *s, arg_rmr *a)
+ static bool opffv_narrow_check(DisasContext *s, arg_rmr *a)
+ {
+     return opfv_narrow_check(s, a) &&
++           require_rvfmin(s) &&
+            require_scale_rvfmin(s) &&
+            (s->sew != MO_8);
+ }
 --
-.31.1
+.45.1

-[PULL 06/18] hw/riscv: opentitan: Fixup the PLIC context addresses
+[PULL 18/28] target/riscv: rvv: Check single width operator for vector fp widen instructions
-From: Alistair Francis <alistair.francis@wdc.com>
+From: Max Chou <max.chou@sifive.com>
-Fixup the PLIC context address to correctly support the threshold and
+The require_scale_rvf function only checks the double width operator for
-claim register.
+the vector floating point widen instructions, so most of the widen
 checking functions need to add require_rvf for single width operator.
-Fixes: ef63100648 ("hw/riscv: opentitan: Update to the latest build")
+The vfwcvt.f.x.v and vfwcvt.f.xu.v instructions convert single width
 integer to double width float, so the opfxv_widen_check function doesn’t
 need require_rvf for the single width operator(integer).
 Signed-off-by: Max Chou <max.chou@sifive.com>
 Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Cc: qemu-stable <qemu-stable@nongnu.org>
 Message-ID: <20240322092600.1198921-3-max.chou@sifive.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-Message-id: 20211025040657.262696-1-alistair.francis@opensource.wdc.com
 ---
- hw/riscv/opentitan.c | 4 ++--
+ target/riscv/insn_trans/trans_rvv.c.inc | 5 +++++
-file changed, 2 insertions(+), 2 deletions(-)
+file changed, 5 insertions(+)
-diff --git a/hw/riscv/opentitan.c b/hw/riscv/opentitan.c
+diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
 index XXXXXXX..XXXXXXX 100644
---- a/hw/riscv/opentitan.c
+--- a/target/riscv/insn_trans/trans_rvv.c.inc
-+++ b/hw/riscv/opentitan.c
++++ b/target/riscv/insn_trans/trans_rvv.c.inc
-@@ -XXX,XX +XXX,XX @@ static void lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
+@@ -XXX,XX +XXX,XX @@ GEN_OPFVF_TRANS(vfrsub_vf,  opfvf_check)
-     qdev_prop_set_uint32(DEVICE(&s->plic), "pending-base", 0x1000);
+ static bool opfvv_widen_check(DisasContext *s, arg_rmrr *a)
-     qdev_prop_set_uint32(DEVICE(&s->plic), "enable-base", 0x2000);
+ {
-     qdev_prop_set_uint32(DEVICE(&s->plic), "enable-stride", 0x18);
+     return require_rvv(s) &&
--    qdev_prop_set_uint32(DEVICE(&s->plic), "context-base", 0x200004);
++           require_rvf(s) &&
--    qdev_prop_set_uint32(DEVICE(&s->plic), "context-stride", 4);
+            require_scale_rvf(s) &&
-+    qdev_prop_set_uint32(DEVICE(&s->plic), "context-base", 0x200000);
+            (s->sew != MO_8) &&
-+    qdev_prop_set_uint32(DEVICE(&s->plic), "context-stride", 8);
+            vext_check_isa_ill(s) &&
-     qdev_prop_set_uint32(DEVICE(&s->plic), "aperture-size", memmap[IBEX_DEV_PLIC].size);
+@@ -XXX,XX +XXX,XX @@ GEN_OPFVV_WIDEN_TRANS(vfwsub_vv, opfvv_widen_check)
+ static bool opfvf_widen_check(DisasContext *s, arg_rmrr *a)
-     if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {
+ {
      return require_rvv(s) &&
 +           require_rvf(s) &&
             require_scale_rvf(s) &&
             (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
@@ -XXX,XX +XXX,XX @@ GEN_OPFVF_WIDEN_TRANS(vfwsub_vf)
  static bool opfwv_widen_check(DisasContext *s, arg_rmrr *a)
  {
      return require_rvv(s) &&
 +           require_rvf(s) &&
             require_scale_rvf(s) &&
             (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
@@ -XXX,XX +XXX,XX @@ GEN_OPFWV_WIDEN_TRANS(vfwsub_wv)
  static bool opfwf_widen_check(DisasContext *s, arg_rmrr *a)
  {
      return require_rvv(s) &&
 +           require_rvf(s) &&
             require_scale_rvf(s) &&
             (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
@@ -XXX,XX +XXX,XX @@ GEN_OPFVV_TRANS(vfredmin_vs, freduction_check)
  static bool freduction_widen_check(DisasContext *s, arg_rmrr *a)
  {
      return reduction_widen_check(s, a) &&
 +           require_rvf(s) &&
             require_scale_rvf(s) &&
             (s->sew != MO_8);
  }
 --
-.31.1
+.45.1

-New patch
+[PULL 19/28] target/riscv: rvv: Check single width operator for vfncvt.rod.f.f.w
+From: Max Chou <max.chou@sifive.com>
+The opfv_narrow_check needs to check the single width float operator by
+require_rvf.
+Signed-off-by: Max Chou <max.chou@sifive.com>
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240322092600.1198921-4-max.chou@sifive.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/insn_trans/trans_rvv.c.inc | 1 +
+file changed, 1 insertion(+)
+diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/insn_trans/trans_rvv.c.inc
++++ b/target/riscv/insn_trans/trans_rvv.c.inc
+@@ -XXX,XX +XXX,XX @@ static bool opffv_narrow_check(DisasContext *s, arg_rmr *a)
+ static bool opffv_rod_narrow_check(DisasContext *s, arg_rmr *a)
+ {
+     return opfv_narrow_check(s, a) &&
++           require_rvf(s) &&
+            require_scale_rvf(s) &&
+            (s->sew != MO_8);
+ }
+--
+.45.1

-[PULL 16/18] target/riscv: change the api for RVF/RVD fmin/fmax
+[PULL 20/28] target/riscv: rvv: Remove redudant SEW checking for vector fp narrow/widen instructions
-From: Chih-Min Chao <chihmin.chao@sifive.com>
+From: Max Chou <max.chou@sifive.com>
-The sNaN propagation behavior has been changed since
+If the checking functions check both the single and double width
-cd20cee7 in https://github.com/riscv/riscv-isa-manual.
+operators at the same time, then the single width operator checking
 functions (require_rvf[min]) will check whether the SEW is 8.
-Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
+Signed-off-by: Max Chou <max.chou@sifive.com>
-Signed-off-by: Frank Chang <frank.chang@sifive.com>
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
-Acked-by: Alistair Francis <alistair.francis@wdc.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
-Message-id: 20211016085428.3001501-3-frank.chang@sifive.com
+Message-ID: <20240322092600.1198921-5-max.chou@sifive.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/fpu_helper.c | 16 ++++++++++++----
+ target/riscv/insn_trans/trans_rvv.c.inc | 16 ++++------------
-file changed, 12 insertions(+), 4 deletions(-)
+file changed, 4 insertions(+), 12 deletions(-)
-diff --git a/target/riscv/fpu_helper.c b/target/riscv/fpu_helper.c
+diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
 index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/fpu_helper.c
+--- a/target/riscv/insn_trans/trans_rvv.c.inc
-+++ b/target/riscv/fpu_helper.c
++++ b/target/riscv/insn_trans/trans_rvv.c.inc
-@@ -XXX,XX +XXX,XX @@ uint64_t helper_fmin_s(CPURISCVState *env, uint64_t rs1, uint64_t rs2)
+@@ -XXX,XX +XXX,XX @@ static bool opfvv_widen_check(DisasContext *s, arg_rmrr *a)
      return require_rvv(s) &&
             require_rvf(s) &&
             require_scale_rvf(s) &&
 -           (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
             vext_check_dss(s, a->rd, a->rs1, a->rs2, a->vm);
  }
@@ -XXX,XX +XXX,XX @@ static bool opfvf_widen_check(DisasContext *s, arg_rmrr *a)
      return require_rvv(s) &&
             require_rvf(s) &&
             require_scale_rvf(s) &&
 -           (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
             vext_check_ds(s, a->rd, a->rs2, a->vm);
  }
@@ -XXX,XX +XXX,XX @@ static bool opfwv_widen_check(DisasContext *s, arg_rmrr *a)
      return require_rvv(s) &&
             require_rvf(s) &&
             require_scale_rvf(s) &&
 -           (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
             vext_check_dds(s, a->rd, a->rs1, a->rs2, a->vm);
  }
@@ -XXX,XX +XXX,XX @@ static bool opfwf_widen_check(DisasContext *s, arg_rmrr *a)
      return require_rvv(s) &&
             require_rvf(s) &&
             require_scale_rvf(s) &&
 -           (s->sew != MO_8) &&
             vext_check_isa_ill(s) &&
             vext_check_dd(s, a->rd, a->rs2, a->vm);
  }
@@ -XXX,XX +XXX,XX @@ static bool opffv_widen_check(DisasContext *s, arg_rmr *a)
  {
-     float32 frs1 = check_nanbox_s(rs1);
+     return opfv_widen_check(s, a) &&
-     float32 frs2 = check_nanbox_s(rs2);
+            require_rvfmin(s) &&
--    return nanbox_s(float32_minnum(frs1, frs2, &env->fp_status));
+-           require_scale_rvfmin(s) &&
-+    return nanbox_s(env->priv_ver < PRIV_VERSION_1_11_0 ?
+-           (s->sew != MO_8);
-+                    float32_minnum(frs1, frs2, &env->fp_status) :
++           require_scale_rvfmin(s);
 +                    float32_minimum_number(frs1, frs2, &env->fp_status));
  }
- uint64_t helper_fmax_s(CPURISCVState *env, uint64_t rs1, uint64_t rs2)
+ #define GEN_OPFV_WIDEN_TRANS(NAME, CHECK, HELPER, FRM)             \
@@ -XXX,XX +XXX,XX @@ static bool opffv_narrow_check(DisasContext *s, arg_rmr *a)
  {
-     float32 frs1 = check_nanbox_s(rs1);
+     return opfv_narrow_check(s, a) &&
-     float32 frs2 = check_nanbox_s(rs2);
+            require_rvfmin(s) &&
--    return nanbox_s(float32_maxnum(frs1, frs2, &env->fp_status));
+-           require_scale_rvfmin(s) &&
-+    return nanbox_s(env->priv_ver < PRIV_VERSION_1_11_0 ?
+-           (s->sew != MO_8);
-+                    float32_maxnum(frs1, frs2, &env->fp_status) :
++           require_scale_rvfmin(s);
 +                    float32_maximum_number(frs1, frs2, &env->fp_status));
  }
- uint64_t helper_fsqrt_s(CPURISCVState *env, uint64_t rs1)
+ static bool opffv_rod_narrow_check(DisasContext *s, arg_rmr *a)
@@ -XXX,XX +XXX,XX @@ uint64_t helper_fdiv_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
  uint64_t helper_fmin_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
  {
--    return float64_minnum(frs1, frs2, &env->fp_status);
+     return opfv_narrow_check(s, a) &&
-+    return env->priv_ver < PRIV_VERSION_1_11_0 ?
+            require_rvf(s) &&
-+            float64_minnum(frs1, frs2, &env->fp_status) :
+-           require_scale_rvf(s) &&
-+            float64_minimum_number(frs1, frs2, &env->fp_status);
+-           (s->sew != MO_8);
 +           require_scale_rvf(s);
  }
- uint64_t helper_fmax_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
+ #define GEN_OPFV_NARROW_TRANS(NAME, CHECK, HELPER, FRM)            \
@@ -XXX,XX +XXX,XX @@ static bool freduction_widen_check(DisasContext *s, arg_rmrr *a)
  {
--    return float64_maxnum(frs1, frs2, &env->fp_status);
+     return reduction_widen_check(s, a) &&
-+    return env->priv_ver < PRIV_VERSION_1_11_0 ?
+            require_rvf(s) &&
-+            float64_maxnum(frs1, frs2, &env->fp_status) :
+-           require_scale_rvf(s) &&
-+            float64_maximum_number(frs1, frs2, &env->fp_status);
+-           (s->sew != MO_8);
 +           require_scale_rvf(s);
  }
- uint64_t helper_fcvt_s_d(CPURISCVState *env, uint64_t rs1)
+ GEN_OPFVV_WIDEN_TRANS(vfwredusum_vs, freduction_widen_check)
 --
-.31.1
+.45.1

-[PULL 18/18] target/riscv: remove force HS exception
+[PULL 21/28] target/riscv: prioritize pmp errors in raise_mmu_exception()
-From: Jose Martins <josemartins90@gmail.com>
+From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
-There is no need to "force an hs exception" as the current privilege
+raise_mmu_exception(), as is today, is prioritizing guest page faults by
-level, the state of the global ie and of the delegation registers should
+checking first if virt_enabled && !first_stage, and then considering the
-be enough to route the interrupt to the appropriate privilege level in
+regular inst/load/store faults.
 riscv_cpu_do_interrupt. The is true for both asynchronous and
 synchronous exceptions, specifically, guest page faults which must be
 hardwired to zero hedeleg. As such the hs_force_except mechanism can be
 removed.
-Signed-off-by: Jose Martins <josemartins90@gmail.com>
+There's no mention in the spec about guest page fault being a higher
 priority that PMP faults. In fact, privileged spec section 3.7.1 says:
 "Attempting to fetch an instruction from a PMP region that does not have
 execute permissions raises an instruction access-fault exception.
 Attempting to execute a load or load-reserved instruction which accesses
 a physical address within a PMP region without read permissions raises a
 load access-fault exception. Attempting to execute a store,
 store-conditional, or AMO instruction which accesses a physical address
 within a PMP region without write permissions raises a store
 access-fault exception."
 So, in fact, we're doing it wrong - PMP faults should always be thrown,
 regardless of also being a first or second stage fault.
 The way riscv_cpu_tlb_fill() and get_physical_address() work is
 adequate: a TRANSLATE_PMP_FAIL error is immediately reported and
 reflected in the 'pmp_violation' flag. What we need is to change
 raise_mmu_exception() to prioritize it.
 Reported-by: Joseph Chan <jchan@ventanamicro.com>
 Fixes: 82d53adfbb ("target/riscv/cpu_helper.c: Invalid exception on MMU translation stage")
 Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211026145126.11025-3-josemartins90@gmail.com
+Message-ID: <20240413105929.7030-1-alexei.filippov@syntacore.com>
 Cc: qemu-stable <qemu-stable@nongnu.org>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu.h        |  2 --
+ target/riscv/cpu_helper.c | 22 ++++++++++++----------
- target/riscv/cpu_bits.h   |  6 ------
+file changed, 12 insertions(+), 10 deletions(-)
  target/riscv/cpu_helper.c | 26 +-------------------------
 files changed, 1 insertion(+), 33 deletions(-)
-diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
-index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/cpu.h
-+++ b/target/riscv/cpu.h
-@@ -XXX,XX +XXX,XX @@ int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
- bool riscv_cpu_fp_enabled(CPURISCVState *env);
- bool riscv_cpu_virt_enabled(CPURISCVState *env);
- void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
--bool riscv_cpu_force_hs_excep_enabled(CPURISCVState *env);
--void riscv_cpu_set_force_hs_excep(CPURISCVState *env, bool enable);
- bool riscv_cpu_two_stage_lookup(int mmu_idx);
- int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
- hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
-diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
-index XXXXXXX..XXXXXXX 100644
---- a/target/riscv/cpu_bits.h
-+++ b/target/riscv/cpu_bits.h
-@@ -XXX,XX +XXX,XX @@ typedef enum {
- /* Virtulisation Register Fields */
- #define VIRT_ONOFF          1
--/* This is used to save state for when we take an exception. If this is set
-- * that means that we want to force a HS level exception (no matter what the
-- * delegation is set to). This will occur for things such as a second level
-- * page table fault.
-- */
--#define FORCE_HS_EXCEP      2
- /* RV32 satp CSR field masks */
- #define SATP32_MODE         0x80000000
 diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu_helper.c
 +++ b/target/riscv/cpu_helper.c
-@@ -XXX,XX +XXX,XX @@ void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
+@@ -XXX,XX +XXX,XX @@ static void raise_mmu_exception(CPURISCVState *env, target_ulong address,
-     env->virt = set_field(env->virt, VIRT_ONOFF, enable);
- }
+     switch (access_type) {
+     case MMU_INST_FETCH:
--bool riscv_cpu_force_hs_excep_enabled(CPURISCVState *env)
+-        if (env->virt_enabled && !first_stage) {
--{
++        if (pmp_violation) {
--    if (!riscv_has_ext(env, RVH)) {
++            cs->exception_index = RISCV_EXCP_INST_ACCESS_FAULT;
--        return false;
++        } else if (env->virt_enabled && !first_stage) {
--    }
+             cs->exception_index = RISCV_EXCP_INST_GUEST_PAGE_FAULT;
--
+         } else {
--    return get_field(env->virt, FORCE_HS_EXCEP);
+-            cs->exception_index = pmp_violation ?
--}
+-                RISCV_EXCP_INST_ACCESS_FAULT : RISCV_EXCP_INST_PAGE_FAULT;
--
++            cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT;
 -void riscv_cpu_set_force_hs_excep(CPURISCVState *env, bool enable)
 -{
 -    if (!riscv_has_ext(env, RVH)) {
 -        return;
 -    }
 -
 -    env->virt = set_field(env->virt, FORCE_HS_EXCEP, enable);
 -}
 -
  bool riscv_cpu_two_stage_lookup(int mmu_idx)
  {
      return mmu_idx & TB_FLAGS_PRIV_HYP_ACCESS_MASK;
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
      RISCVCPU *cpu = RISCV_CPU(cs);
      CPURISCVState *env = &cpu->env;
 -    bool force_hs_execp = riscv_cpu_force_hs_excep_enabled(env);
      uint64_t s;
      /* cs->exception is 32-bits wide unlike mcause which is XLEN-bits wide
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
          case RISCV_EXCP_INST_GUEST_PAGE_FAULT:
          case RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT:
          case RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT:
 -            force_hs_execp = true;
 -            /* fallthrough */
          case RISCV_EXCP_INST_ADDR_MIS:
          case RISCV_EXCP_INST_ACCESS_FAULT:
          case RISCV_EXCP_LOAD_ADDR_MIS:
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
                  env->hstatus = set_field(env->hstatus, HSTATUS_GVA, 0);
              }
 -            if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1) &&
 -                !force_hs_execp) {
 +            if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1)) {
                  /* Trap to VS mode */
                  /*
                   * See if we need to adjust cause. Yes if its VS mode interrupt
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
                  htval = env->guest_phys_fault_addr;
                  riscv_cpu_set_virt_enabled(env, 0);
 -                riscv_cpu_set_force_hs_excep(env, 0);
              } else {
                  /* Trap into HS mode */
                  env->hstatus = set_field(env->hstatus, HSTATUS_SPV, false);
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
              /* Trapping to M mode, virt is disabled */
              riscv_cpu_set_virt_enabled(env, 0);
 -            riscv_cpu_set_force_hs_excep(env, 0);
          }
+         break;
-         s = env->mstatus;
+     case MMU_DATA_LOAD:
 -        if (two_stage && !first_stage) {
 +        if (pmp_violation) {
 +            cs->exception_index = RISCV_EXCP_LOAD_ACCESS_FAULT;
 +        } else if (two_stage && !first_stage) {
              cs->exception_index = RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT;
          } else {
 -            cs->exception_index = pmp_violation ?
 -                RISCV_EXCP_LOAD_ACCESS_FAULT : RISCV_EXCP_LOAD_PAGE_FAULT;
 +            cs->exception_index = RISCV_EXCP_LOAD_PAGE_FAULT;
          }
          break;
      case MMU_DATA_STORE:
 -        if (two_stage && !first_stage) {
 +        if (pmp_violation) {
 +            cs->exception_index = RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
 +        } else if (two_stage && !first_stage) {
              cs->exception_index = RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT;
          } else {
 -            cs->exception_index = pmp_violation ?
 -                RISCV_EXCP_STORE_AMO_ACCESS_FAULT :
 -                RISCV_EXCP_STORE_PAGE_FAULT;
 +            cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT;
          }
          break;
      default:
 --
-.31.1
+.45.1

-[PULL 17/18] target/riscv: fix VS interrupts forwarding to HS
+[PULL 22/28] target/riscv: do not set mtval2 for non guest-page faults
-From: Jose Martins <josemartins90@gmail.com>
+From: Alexei Filippov <alexei.filippov@syntacore.com>
-VS interrupts (2, 6, 10) were not correctly forwarded to hs-mode when
+Previous patch fixed the PMP priority in raise_mmu_exception() but we're still
-not delegated in hideleg (which was not being taken into account). This
+setting mtval2 incorrectly. In riscv_cpu_tlb_fill(), after pmp check in 2 stage
-was mainly because hs level sie was not always considered enabled when
+translation part, mtval2 will be set in case of successes 2 stage translation but
-it should. The spec states that "Interrupts for higher-privilege modes,
+failed pmp check.
 y>x, are always globally enabled regardless of the setting of the global
 yIE bit for the higher-privilege mode." and also "For purposes of
 interrupt global enables, HS-mode is considered more privileged than
 VS-mode, and VS-mode is considered more privileged than VU-mode". Also,
 vs-level interrupts were not being taken into account unless V=1, but
 should be unless delegated.
-Finally, there is no need for a special case for to handle vs interrupts
+In this case we gonna set mtval2 via env->guest_phys_fault_addr in context of
-as the current privilege level, the state of the global ie and of the
+riscv_cpu_tlb_fill(), as this was a guest-page-fault, but it didn't and mtval2
-delegation registers should be enough to route all interrupts to the
+should be zero, according to RISCV privileged spec sect. 9.4.4: When a guest
-appropriate privilege level in riscv_cpu_do_interrupt.
+page-fault is taken into M-mode, mtval2 is written with either zero or guest
 physical address that faulted, shifted by 2 bits. *For other traps, mtval2
 is set to zero...*
-Signed-off-by: Jose Martins <josemartins90@gmail.com>
+Signed-off-by: Alexei Filippov <alexei.filippov@syntacore.com>
 Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211026145126.11025-2-josemartins90@gmail.com
+Message-ID: <20240503103052.6819-1-alexei.filippov@syntacore.com>
 Cc: qemu-stable <qemu-stable@nongnu.org>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu_helper.c | 28 ++++++++--------------------
+ target/riscv/cpu_helper.c | 12 ++++++------
-file changed, 8 insertions(+), 20 deletions(-)
+file changed, 6 insertions(+), 6 deletions(-)
 diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu_helper.c
 +++ b/target/riscv/cpu_helper.c
-@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
+@@ -XXX,XX +XXX,XX @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
- #ifndef CONFIG_USER_ONLY
+                               __func__, pa, ret, prot_pmp, tlb_size);
- static int riscv_cpu_local_irq_pending(CPURISCVState *env)
- {
+                 prot &= prot_pmp;
--    target_ulong irqs;
+-            }
 +    target_ulong virt_enabled = riscv_cpu_virt_enabled(env);
      target_ulong mstatus_mie = get_field(env->mstatus, MSTATUS_MIE);
      target_ulong mstatus_sie = get_field(env->mstatus, MSTATUS_SIE);
 -    target_ulong hs_mstatus_sie = get_field(env->mstatus_hs, MSTATUS_SIE);
 -    target_ulong pending = env->mip & env->mie &
 -                               ~(MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
 -    target_ulong vspending = (env->mip & env->mie &
 -                              (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP));
 +    target_ulong pending = env->mip & env->mie;
      target_ulong mie    = env->priv < PRV_M ||
                            (env->priv == PRV_M && mstatus_mie);
      target_ulong sie    = env->priv < PRV_S ||
                            (env->priv == PRV_S && mstatus_sie);
 -    target_ulong hs_sie = env->priv < PRV_S ||
 -                          (env->priv == PRV_S && hs_mstatus_sie);
 +    target_ulong hsie   = virt_enabled || sie;
 +    target_ulong vsie   = virt_enabled && sie;
 -    if (riscv_cpu_virt_enabled(env)) {
 -        target_ulong pending_hs_irq = pending & -hs_sie;
 -
--        if (pending_hs_irq) {
+-            if (ret != TRANSLATE_SUCCESS) {
--            riscv_cpu_set_force_hs_excep(env, FORCE_HS_EXCEP);
++            } else {
--            return ctz64(pending_hs_irq);
+                 /*
--        }
+                  * Guest physical address translation failed, this is a HS
--
+                  * level exception
--        pending = vspending;
+                  */
--    }
+                 first_stage_error = false;
--
+-                env->guest_phys_fault_addr = (im_address |
--    irqs = (pending & ~env->mideleg & -mie) | (pending &  env->mideleg & -sie);
+-                                              (address &
-+    target_ulong irqs =
+-                                               (TARGET_PAGE_SIZE - 1))) >> 2;
-+            (pending & ~env->mideleg & -mie) |
++                if (ret != TRANSLATE_PMP_FAIL) {
-+            (pending &  env->mideleg & ~env->hideleg & -hsie) |
++                    env->guest_phys_fault_addr = (im_address |
-+            (pending &  env->mideleg &  env->hideleg & -vsie);
++                                                  (address &
++                                                   (TARGET_PAGE_SIZE - 1))) >> 2;
-     if (irqs) {
++                }
-         return ctz64(irqs); /* since non-zero */
+             }
          }
      } else {
 --
-.31.1
+.45.1

-[PULL 11/18] target/riscv: Print new PM CSRs in QEMU logs
+[PULL 23/28] target/riscv: Remove experimental prefix from "B" extension
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Rob Bradford <rbradford@rivosinc.com>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+This extension has now been ratified:
 https://jira.riscv.org/browse/RVS-2006 so the "x-" prefix can be
 removed.
 Since this is now a ratified extension add it to the list of extensions
 included in the "max" CPU variant.
 Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
 Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211025173609.2724490-6-space.monkey.delivers@gmail.com
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
 Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
 Message-ID: <20240514110217.22516-1-rbradford@rivosinc.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu.c | 7 +++++++
+ target/riscv/cpu.c         | 2 +-
-file changed, 7 insertions(+)
+ target/riscv/tcg/tcg-cpu.c | 2 +-
 files changed, 2 insertions(+), 2 deletions(-)
 diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.c
 +++ b/target/riscv/cpu.c
-@@ -XXX,XX +XXX,XX @@ static void riscv_cpu_dump_state(CPUState *cs, FILE *f, int flags)
+@@ -XXX,XX +XXX,XX @@ static const MISAExtInfo misa_ext_info_arr[] = {
-             CSR_MSCRATCH,
+     MISA_EXT_INFO(RVJ, "x-j", "Dynamic translated languages"),
-             CSR_SSCRATCH,
+     MISA_EXT_INFO(RVV, "v", "Vector operations"),
-             CSR_SATP,
+     MISA_EXT_INFO(RVG, "g", "General purpose (IMAFD_Zicsr_Zifencei)"),
-+            CSR_MMTE,
+-    MISA_EXT_INFO(RVB, "x-b", "Bit manipulation (Zba_Zbb_Zbs)")
-+            CSR_UPMBASE,
++    MISA_EXT_INFO(RVB, "b", "Bit manipulation (Zba_Zbb_Zbs)")
-+            CSR_UPMMASK,
+ };
-+            CSR_SPMBASE,
-+            CSR_SPMMASK,
+ static void riscv_cpu_validate_misa_mxl(RISCVCPUClass *mcc)
-+            CSR_MPMBASE,
+diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
-+            CSR_MPMMASK,
+index XXXXXXX..XXXXXXX 100644
-         };
+--- a/target/riscv/tcg/tcg-cpu.c
++++ b/target/riscv/tcg/tcg-cpu.c
-         for (int i = 0; i < ARRAY_SIZE(dump_csrs); ++i) {
+@@ -XXX,XX +XXX,XX @@ static void riscv_init_max_cpu_extensions(Object *obj)
      const RISCVCPUMultiExtConfig *prop;
      /* Enable RVG, RVJ and RVV that are disabled by default */
 -    riscv_cpu_set_misa_ext(env, env->misa_ext | RVG | RVJ | RVV);
 +    riscv_cpu_set_misa_ext(env, env->misa_ext | RVB | RVG | RVJ | RVV);
      for (prop = riscv_cpu_extensions; prop && prop->name; prop++) {
          isa_ext_update_enabled(cpu, prop->offset, true);
 --
-.31.1
+.45.1

-[PULL 05/18] hw/riscv: virt: Use the PLIC config helper function
+[PULL 24/28] target/riscv: rvzicbo: Fixup CBO extension register calculation
-From: Alistair Francis <alistair.francis@wdc.com>
+From: Alistair Francis <alistair23@gmail.com>
 When running the instruction
 ```
     cbo.flush 0(x0)
 ```
 QEMU would segfault.
 The issue was in cpu_gpr[a->rs1] as QEMU does not have cpu_gpr[0]
 allocated.
 In order to fix this let's use the existing get_address()
 helper. This also has the benefit of performing pointer mask
 calculations on the address specified in rs1.
 The pointer masking specificiation specifically states:
 """
 Cache Management Operations: All instructions in Zicbom, Zicbop and Zicboz
 """
 So this is the correct behaviour and we previously have been incorrectly
 not masking the address.
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Reported-by: Fabian Thomas <fabian.thomas@cispa.de>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
+Fixes: e05da09b7cfd ("target/riscv: implement Zicbom extension")
-Tested-by: Bin Meng <bmeng.cn@gmail.com>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
-Message-id: 20211022060133.3045020-5-alistair.francis@opensource.wdc.com
+Cc: qemu-stable <qemu-stable@nongnu.org>
 Message-ID: <20240514023910.301766-1-alistair.francis@wdc.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- hw/riscv/virt.c | 20 +-------------------
+ target/riscv/insn_trans/trans_rvzicbo.c.inc | 16 ++++++++++++----
-file changed, 1 insertion(+), 19 deletions(-)
+file changed, 12 insertions(+), 4 deletions(-)
-diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
+diff --git a/target/riscv/insn_trans/trans_rvzicbo.c.inc b/target/riscv/insn_trans/trans_rvzicbo.c.inc
 index XXXXXXX..XXXXXXX 100644
---- a/hw/riscv/virt.c
+--- a/target/riscv/insn_trans/trans_rvzicbo.c.inc
-+++ b/hw/riscv/virt.c
++++ b/target/riscv/insn_trans/trans_rvzicbo.c.inc
-@@ -XXX,XX +XXX,XX @@ static FWCfgState *create_fw_cfg(const MachineState *mc)
+@@ -XXX,XX +XXX,XX @@
-     return fw_cfg;
+ static bool trans_cbo_clean(DisasContext *ctx, arg_cbo_clean *a)
  {
      REQUIRE_ZICBOM(ctx);
 -    gen_helper_cbo_clean_flush(tcg_env, cpu_gpr[a->rs1]);
 +    TCGv src = get_address(ctx, a->rs1, 0);
 +
 +    gen_helper_cbo_clean_flush(tcg_env, src);
      return true;
  }
--/*
+ static bool trans_cbo_flush(DisasContext *ctx, arg_cbo_flush *a)
 - * Return the per-socket PLIC hart topology configuration string
 - * (caller must free with g_free())
 - */
 -static char *plic_hart_config_string(int hart_count)
 -{
 -    g_autofree const char **vals = g_new(const char *, hart_count + 1);
 -    int i;
 -
 -    for (i = 0; i < hart_count; i++) {
 -        vals[i] = "MS";
 -    }
 -    vals[i] = NULL;
 -
 -    /* g_strjoinv() obliges us to cast away const here */
 -    return g_strjoinv(",", (char **)vals);
 -}
 -
  static void virt_machine_init(MachineState *machine)
  {
-     const MemMapEntry *memmap = virt_memmap;
+     REQUIRE_ZICBOM(ctx);
-@@ -XXX,XX +XXX,XX @@ static void virt_machine_init(MachineState *machine)
+-    gen_helper_cbo_clean_flush(tcg_env, cpu_gpr[a->rs1]);
-         }
++    TCGv src = get_address(ctx, a->rs1, 0);
++
-         /* Per-socket PLIC hart topology configuration string */
++    gen_helper_cbo_clean_flush(tcg_env, src);
--        plic_hart_config = plic_hart_config_string(hart_count);
+     return true;
-+        plic_hart_config = riscv_plic_hart_config_string(hart_count);
+ }
-         /* Per-socket PLIC */
+ static bool trans_cbo_inval(DisasContext *ctx, arg_cbo_inval *a)
-         s->plic[i] = sifive_plic_create(
+ {
      REQUIRE_ZICBOM(ctx);
 -    gen_helper_cbo_inval(tcg_env, cpu_gpr[a->rs1]);
 +    TCGv src = get_address(ctx, a->rs1, 0);
 +
 +    gen_helper_cbo_inval(tcg_env, src);
      return true;
  }
  static bool trans_cbo_zero(DisasContext *ctx, arg_cbo_zero *a)
  {
      REQUIRE_ZICBOZ(ctx);
 -    gen_helper_cbo_zero(tcg_env, cpu_gpr[a->rs1]);
 +    TCGv src = get_address(ctx, a->rs1, 0);
 +
 +    gen_helper_cbo_zero(tcg_env, src);
      return true;
  }
 --
-.31.1
+.45.1

-New patch
+[PULL 25/28] target/riscv/kvm.c: Fix the hart bit setting of AIA
+From: Yong-Xuan Wang <yongxuan.wang@sifive.com>
+In AIA spec, each hart (or each hart within a group) has a unique hart
+number to locate the memory pages of interrupt files in the address
+space. The number of bits required to represent any hart number is equal
+to ceil(log2(hmax + 1)), where hmax is the largest hart number among
+groups.
+However, if the largest hart number among groups is a power of 2, QEMU
+will pass an inaccurate hart-index-bit setting to Linux. For example, when
+the guest OS has 4 harts, only ceil(log2(3 + 1)) = 2 bits are sufficient
+to represent 4 harts, but we passes 3 to Linux. The code needs to be
+updated to ensure accurate hart-index-bit settings.
+Additionally, a Linux patch[1] is necessary to correctly recover the hart
+index when the guest OS has only 1 hart, where the hart-index-bit is 0.
+[1] https://lore.kernel.org/lkml/20240415064905.25184-1-yongxuan.wang@sifive.com/t/
+Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
+Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240515091129.28116-1-yongxuan.wang@sifive.com>
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+---
+ target/riscv/kvm/kvm-cpu.c | 9 ++++++++-
+file changed, 8 insertions(+), 1 deletion(-)
+diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/riscv/kvm/kvm-cpu.c
++++ b/target/riscv/kvm/kvm-cpu.c
+@@ -XXX,XX +XXX,XX @@ void kvm_riscv_aia_create(MachineState *machine, uint64_t group_shift,
+         }
+     }
+-    hart_bits = find_last_bit(&max_hart_per_socket, BITS_PER_LONG) + 1;
++
++    if (max_hart_per_socket > 1) {
++        max_hart_per_socket--;
++        hart_bits = find_last_bit(&max_hart_per_socket, BITS_PER_LONG) + 1;
++    } else {
++        hart_bits = 0;
++    }
++
+     ret = kvm_device_access(aia_fd, KVM_DEV_RISCV_AIA_GRP_CONFIG,
+                             KVM_DEV_RISCV_AIA_CONFIG_HART_BITS,
+                             &hart_bits, true, NULL);
+--
+.45.1

-[PULL 04/18] hw/riscv: microchip_pfsoc: Use the PLIC config helper function
+[PULL 26/28] riscv, gdbstub.c: fix reg_width in ricsv_gen_dynamic_vector_feature()
-From: Alistair Francis <alistair.francis@wdc.com>
+From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Commit 33a24910ae changed 'reg_width' to use 'vlenb', i.e. vector length
+in bytes, when in this context we want 'reg_width' as the length in
+bits.
+Fix 'reg_width' back to the value in bits like 7cb59921c05a
+("target/riscv/gdbstub.c: use 'vlenb' instead of shifting 'vlen'") set
+beforehand.
+While we're at it, rename 'reg_width' to 'bitsize' to provide a bit more
+clarity about what the variable represents. 'bitsize' is also used in
+riscv_gen_dynamic_csr_feature() with the same purpose, i.e. as an input to
+gdb_feature_builder_append_reg().
+Cc: Akihiko Odaki <akihiko.odaki@daynix.com>
+Cc: Alex Bennée <alex.bennee@linaro.org>
+Reported-by: Robin Dapp <rdapp.gcc@gmail.com>
+Fixes: 33a24910ae ("target/riscv: Use GDBFeature for dynamic XML")
+Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
+Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
+Acked-by: Alex Bennée <alex.bennee@linaro.org>
+Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
+Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
+Message-ID: <20240517203054.880861-2-dbarboza@ventanamicro.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-Tested-by: Bin Meng <bmeng.cn@gmail.com>
-Message-id: 20211022060133.3045020-4-alistair.francis@opensource.wdc.com
 ---
- include/hw/riscv/microchip_pfsoc.h |  1 -
+ target/riscv/gdbstub.c | 6 +++---
- hw/riscv/microchip_pfsoc.c         | 14 +-------------
+file changed, 3 insertions(+), 3 deletions(-)
 files changed, 1 insertion(+), 14 deletions(-)
-diff --git a/include/hw/riscv/microchip_pfsoc.h b/include/hw/riscv/microchip_pfsoc.h
+diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
 index XXXXXXX..XXXXXXX 100644
---- a/include/hw/riscv/microchip_pfsoc.h
+--- a/target/riscv/gdbstub.c
-+++ b/include/hw/riscv/microchip_pfsoc.h
++++ b/target/riscv/gdbstub.c
-@@ -XXX,XX +XXX,XX @@ enum {
+@@ -XXX,XX +XXX,XX @@ static GDBFeature *riscv_gen_dynamic_csr_feature(CPUState *cs, int base_reg)
- #define MICROCHIP_PFSOC_MANAGEMENT_CPU_COUNT    1
+ static GDBFeature *ricsv_gen_dynamic_vector_feature(CPUState *cs, int base_reg)
- #define MICROCHIP_PFSOC_COMPUTE_CPU_COUNT       4
+ {
+     RISCVCPU *cpu = RISCV_CPU(cs);
--#define MICROCHIP_PFSOC_PLIC_HART_CONFIG        "MS"
+-    int reg_width = cpu->cfg.vlenb;
- #define MICROCHIP_PFSOC_PLIC_NUM_SOURCES        185
++    int bitsize = cpu->cfg.vlenb << 3;
- #define MICROCHIP_PFSOC_PLIC_NUM_PRIORITIES     7
+     GDBFeatureBuilder builder;
  #define MICROCHIP_PFSOC_PLIC_PRIORITY_BASE      0x04
 diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
 index XXXXXXX..XXXXXXX 100644
 --- a/hw/riscv/microchip_pfsoc.c
 +++ b/hw/riscv/microchip_pfsoc.c
@@ -XXX,XX +XXX,XX @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, Error **errp)
      MemoryRegion *envm_data = g_new(MemoryRegion, 1);
      MemoryRegion *qspi_xip_mem = g_new(MemoryRegion, 1);
      char *plic_hart_config;
 -    size_t plic_hart_config_len;
      NICInfo *nd;
      int i;
-@@ -XXX,XX +XXX,XX @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, Error **errp)
+@@ -XXX,XX +XXX,XX @@ static GDBFeature *ricsv_gen_dynamic_vector_feature(CPUState *cs, int base_reg)
-                                 l2lim_mem);
+     /* First define types and totals in a whole VL */
-     /* create PLIC hart topology configuration string */
+     for (i = 0; i < ARRAY_SIZE(vec_lanes); i++) {
--    plic_hart_config_len = (strlen(MICROCHIP_PFSOC_PLIC_HART_CONFIG) + 1) *
+-        int count = reg_width / vec_lanes[i].size;
--                           ms->smp.cpus;
++        int count = bitsize / vec_lanes[i].size;
--    plic_hart_config = g_malloc0(plic_hart_config_len);
+         gdb_feature_builder_append_tag(
--    for (i = 0; i < ms->smp.cpus; i++) {
+             &builder, "<vector id=\"%s\" type=\"%s\" count=\"%d\"/>",
--        if (i != 0) {
+             vec_lanes[i].id, vec_lanes[i].gdb_type, count);
--            strncat(plic_hart_config, "," MICROCHIP_PFSOC_PLIC_HART_CONFIG,
+@@ -XXX,XX +XXX,XX @@ static GDBFeature *ricsv_gen_dynamic_vector_feature(CPUState *cs, int base_reg)
--                    plic_hart_config_len);
+     /* Define vector registers */
--        } else {
+     for (i = 0; i < 32; i++) {
--            strncat(plic_hart_config, "M", plic_hart_config_len);
+         gdb_feature_builder_append_reg(&builder, g_strdup_printf("v%d", i),
--        }
+-                                       reg_width, i, "riscv_vector", "vector");
--        plic_hart_config_len -= (strlen(MICROCHIP_PFSOC_PLIC_HART_CONFIG) + 1);
++                                       bitsize, i, "riscv_vector", "vector");
--    }
+     }
-+    plic_hart_config = riscv_plic_hart_config_string(ms->smp.cpus);
+     gdb_feature_builder_end(&builder);
      /* PLIC */
      s->plic = sifive_plic_create(memmap[MICROCHIP_PFSOC_PLIC].base,
 --
-.31.1
+.45.1

-[PULL 03/18] hw/riscv: sifive_u: Use the PLIC config helper function
+[PULL 27/28] disas/riscv: Decode all of the pmpcfg and pmpaddr CSRs
-From: Alistair Francis <alistair.francis@wdc.com>
+From: Alistair Francis <alistair23@gmail.com>
+Previously we only listed a single pmpcfg CSR and the first 16 pmpaddr
+CSRs. This patch fixes this to list all 16 pmpcfg and all 64 pmpaddr
+CSRs are part of the disassembly.
+Reported-by: Eric DeVolder <eric_devolder@yahoo.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
-Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Fixes: ea10325917 ("RISC-V Disassembler")
-Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
+Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
-Tested-by: Bin Meng <bmeng.cn@gmail.com>
+Cc: qemu-stable <qemu-stable@nongnu.org>
-Message-id: 20211022060133.3045020-3-alistair.francis@opensource.wdc.com
+Message-ID: <20240514051615.330979-1-alistair.francis@wdc.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- include/hw/riscv/sifive_u.h |  1 -
+ disas/riscv.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++-
- hw/riscv/sifive_u.c         | 14 +-------------
+file changed, 64 insertions(+), 1 deletion(-)
 files changed, 1 insertion(+), 14 deletions(-)
-diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
+diff --git a/disas/riscv.c b/disas/riscv.c
 index XXXXXXX..XXXXXXX 100644
---- a/include/hw/riscv/sifive_u.h
+--- a/disas/riscv.c
-+++ b/include/hw/riscv/sifive_u.h
++++ b/disas/riscv.c
-@@ -XXX,XX +XXX,XX @@ enum {
+@@ -XXX,XX +XXX,XX @@ static const char *csr_name(int csrno)
- #define SIFIVE_U_MANAGEMENT_CPU_COUNT   1
+     case 0x0383: return "mibound";
- #define SIFIVE_U_COMPUTE_CPU_COUNT      4
+     case 0x0384: return "mdbase";
+     case 0x0385: return "mdbound";
--#define SIFIVE_U_PLIC_HART_CONFIG "MS"
+-    case 0x03a0: return "pmpcfg3";
- #define SIFIVE_U_PLIC_NUM_SOURCES 54
++    case 0x03a0: return "pmpcfg0";
- #define SIFIVE_U_PLIC_NUM_PRIORITIES 7
++    case 0x03a1: return "pmpcfg1";
- #define SIFIVE_U_PLIC_PRIORITY_BASE 0x04
++    case 0x03a2: return "pmpcfg2";
-diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
++    case 0x03a3: return "pmpcfg3";
-index XXXXXXX..XXXXXXX 100644
++    case 0x03a4: return "pmpcfg4";
---- a/hw/riscv/sifive_u.c
++    case 0x03a5: return "pmpcfg5";
-+++ b/hw/riscv/sifive_u.c
++    case 0x03a6: return "pmpcfg6";
-@@ -XXX,XX +XXX,XX @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
++    case 0x03a7: return "pmpcfg7";
-     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
++    case 0x03a8: return "pmpcfg8";
-     MemoryRegion *l2lim_mem = g_new(MemoryRegion, 1);
++    case 0x03a9: return "pmpcfg9";
-     char *plic_hart_config;
++    case 0x03aa: return "pmpcfg10";
--    size_t plic_hart_config_len;
++    case 0x03ab: return "pmpcfg11";
-     int i, j;
++    case 0x03ac: return "pmpcfg12";
-     NICInfo *nd = &nd_table[0];
++    case 0x03ad: return "pmpcfg13";
++    case 0x03ae: return "pmpcfg14";
-@@ -XXX,XX +XXX,XX @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
++    case 0x03af: return "pmpcfg15";
-                                 l2lim_mem);
+     case 0x03b0: return "pmpaddr0";
+     case 0x03b1: return "pmpaddr1";
-     /* create PLIC hart topology configuration string */
+     case 0x03b2: return "pmpaddr2";
--    plic_hart_config_len = (strlen(SIFIVE_U_PLIC_HART_CONFIG) + 1) *
+@@ -XXX,XX +XXX,XX @@ static const char *csr_name(int csrno)
--                           ms->smp.cpus;
+     case 0x03bd: return "pmpaddr13";
--    plic_hart_config = g_malloc0(plic_hart_config_len);
+     case 0x03be: return "pmpaddr14";
--    for (i = 0; i < ms->smp.cpus; i++) {
+     case 0x03bf: return "pmpaddr15";
--        if (i != 0) {
++    case 0x03c0: return "pmpaddr16";
--            strncat(plic_hart_config, "," SIFIVE_U_PLIC_HART_CONFIG,
++    case 0x03c1: return "pmpaddr17";
--                    plic_hart_config_len);
++    case 0x03c2: return "pmpaddr18";
--        } else {
++    case 0x03c3: return "pmpaddr19";
--            strncat(plic_hart_config, "M", plic_hart_config_len);
++    case 0x03c4: return "pmpaddr20";
--        }
++    case 0x03c5: return "pmpaddr21";
--        plic_hart_config_len -= (strlen(SIFIVE_U_PLIC_HART_CONFIG) + 1);
++    case 0x03c6: return "pmpaddr22";
--    }
++    case 0x03c7: return "pmpaddr23";
-+    plic_hart_config = riscv_plic_hart_config_string(ms->smp.cpus);
++    case 0x03c8: return "pmpaddr24";
++    case 0x03c9: return "pmpaddr25";
-     /* MMIO */
++    case 0x03ca: return "pmpaddr26";
-     s->plic = sifive_plic_create(memmap[SIFIVE_U_DEV_PLIC].base,
++    case 0x03cb: return "pmpaddr27";
 +    case 0x03cc: return "pmpaddr28";
 +    case 0x03cd: return "pmpaddr29";
 +    case 0x03ce: return "pmpaddr30";
 +    case 0x03cf: return "pmpaddr31";
 +    case 0x03d0: return "pmpaddr32";
 +    case 0x03d1: return "pmpaddr33";
 +    case 0x03d2: return "pmpaddr34";
 +    case 0x03d3: return "pmpaddr35";
 +    case 0x03d4: return "pmpaddr36";
 +    case 0x03d5: return "pmpaddr37";
 +    case 0x03d6: return "pmpaddr38";
 +    case 0x03d7: return "pmpaddr39";
 +    case 0x03d8: return "pmpaddr40";
 +    case 0x03d9: return "pmpaddr41";
 +    case 0x03da: return "pmpaddr42";
 +    case 0x03db: return "pmpaddr43";
 +    case 0x03dc: return "pmpaddr44";
 +    case 0x03dd: return "pmpaddr45";
 +    case 0x03de: return "pmpaddr46";
 +    case 0x03df: return "pmpaddr47";
 +    case 0x03e0: return "pmpaddr48";
 +    case 0x03e1: return "pmpaddr49";
 +    case 0x03e2: return "pmpaddr50";
 +    case 0x03e3: return "pmpaddr51";
 +    case 0x03e4: return "pmpaddr52";
 +    case 0x03e5: return "pmpaddr53";
 +    case 0x03e6: return "pmpaddr54";
 +    case 0x03e7: return "pmpaddr55";
 +    case 0x03e8: return "pmpaddr56";
 +    case 0x03e9: return "pmpaddr57";
 +    case 0x03ea: return "pmpaddr58";
 +    case 0x03eb: return "pmpaddr59";
 +    case 0x03ec: return "pmpaddr60";
 +    case 0x03ed: return "pmpaddr61";
 +    case 0x03ee: return "pmpaddr62";
 +    case 0x03ef: return "pmpaddr63";
      case 0x0780: return "mtohost";
      case 0x0781: return "mfromhost";
      case 0x0782: return "mreset";
 --
-.31.1
+.45.1

-[PULL 09/18] target/riscv: Support CSRs required for RISC-V PM extension except for the h-mode
+[PULL 28/28] target/riscv: raise an exception when CSRRS/CSRRC writes a read-only CSR
-From: Alexey Baturo <baturo.alexey@gmail.com>
+From: Yu-Ming Chang <yumin686@andestech.com>
-Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
+Both CSRRS and CSRRC always read the addressed CSR and cause any read side
 effects regardless of rs1 and rd fields. Note that if rs1 specifies a register
 holding a zero value other than x0, the instruction will still attempt to write
 the unmodified value back to the CSR and will cause any attendant side effects.
 So if CSRRS or CSRRC tries to write a read-only CSR with rs1 which specifies
 a register holding a zero value, an illegal instruction exception should be
 raised.
 Signed-off-by: Yu-Ming Chang <yumin686@andestech.com>
 Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
-Message-id: 20211025173609.2724490-4-space.monkey.delivers@gmail.com
+Message-ID: <20240403070823.80897-1-yumin686@andestech.com>
 Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
 ---
- target/riscv/cpu.h |  11 ++
+ target/riscv/cpu.h       |  4 ++++
- target/riscv/cpu.c |   2 +
+ target/riscv/csr.c       | 51 ++++++++++++++++++++++++++++++++++++----
- target/riscv/csr.c | 285 +++++++++++++++++++++++++++++++++++++++++++++
+ target/riscv/op_helper.c |  6 ++---
-files changed, 298 insertions(+)
+files changed, 53 insertions(+), 8 deletions(-)
 diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.h
 +++ b/target/riscv/cpu.h
-@@ -XXX,XX +XXX,XX @@ struct CPURISCVState {
+@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
+ void riscv_cpu_update_mask(CPURISCVState *env);
-     /* True if in debugger mode.  */
+ bool riscv_cpu_is_32bit(RISCVCPU *cpu);
-     bool debugger;
-+
++RISCVException riscv_csrr(CPURISCVState *env, int csrno,
-+    /*
++                          target_ulong *ret_value);
-+     * CSRs for PointerMasking extension
+ RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
-+     */
+                            target_ulong *ret_value,
-+    target_ulong mmte;
+                            target_ulong new_value, target_ulong write_mask);
-+    target_ulong mpmmask;
+@@ -XXX,XX +XXX,XX @@ typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno,
-+    target_ulong mpmbase;
+                                           target_ulong new_value,
-+    target_ulong spmmask;
+                                           target_ulong write_mask);
-+    target_ulong spmbase;
-+    target_ulong upmmask;
++RISCVException riscv_csrr_i128(CPURISCVState *env, int csrno,
-+    target_ulong upmbase;
++                               Int128 *ret_value);
- #endif
+ RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno,
+                                 Int128 *ret_value,
-     float_status fp_status;
+                                 Int128 new_value, Int128 write_mask);
 diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/cpu.c
 +++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ static void riscv_cpu_reset(DeviceState *dev)
      env->mcause = 0;
      env->pc = env->resetvec;
      env->two_stage_lookup = false;
 +    /* mmte is supposed to have pm.current hardwired to 1 */
 +    env->mmte |= (PM_EXT_INITIAL | MMTE_M_PM_CURRENT);
  #endif
      cs->exception_index = RISCV_EXCP_NONE;
      env->load_res = -1;
 diff --git a/target/riscv/csr.c b/target/riscv/csr.c
 index XXXXXXX..XXXXXXX 100644
 --- a/target/riscv/csr.c
 +++ b/target/riscv/csr.c
-@@ -XXX,XX +XXX,XX @@ static RISCVException hmode32(CPURISCVState *env, int csrno)
+@@ -XXX,XX +XXX,XX @@ static RISCVException rmw_seed(CPURISCVState *env, int csrno,
  static inline RISCVException riscv_csrrw_check(CPURISCVState *env,
                                                 int csrno,
 -                                               bool write_mask)
 +                                               bool write)
  {
      /* check privileges and return RISCV_EXCP_ILLEGAL_INST if check fails */
      bool read_only = get_field(csrno, 0xC00) == 3;
@@ -XXX,XX +XXX,XX @@ static inline RISCVException riscv_csrrw_check(CPURISCVState *env,
      }
      /* read / write check */
 -    if (write_mask && read_only) {
 +    if (write && read_only) {
          return RISCV_EXCP_ILLEGAL_INST;
      }
@@ -XXX,XX +XXX,XX @@ static RISCVException riscv_csrrw_do64(CPURISCVState *env, int csrno,
      return RISCV_EXCP_NONE;
  }
-+/* Checks if PointerMasking registers could be accessed */
++RISCVException riscv_csrr(CPURISCVState *env, int csrno,
-+static RISCVException pointer_masking(CPURISCVState *env, int csrno)
++                           target_ulong *ret_value)
 +{
-+    /* Check if j-ext is present */
++    RISCVException ret = riscv_csrrw_check(env, csrno, false);
-+    if (riscv_has_ext(env, RVJ)) {
++    if (ret != RISCV_EXCP_NONE) {
-+        return RISCV_EXCP_NONE;
++        return ret;
 +    }
-+    return RISCV_EXCP_ILLEGAL_INST;
++
 +    return riscv_csrrw_do64(env, csrno, ret_value, 0, 0);
 +}
 +
- static RISCVException pmp(CPURISCVState *env, int csrno)
+ RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
                             target_ulong *ret_value,
                             target_ulong new_value, target_ulong write_mask)
  {
-     if (riscv_feature(env, RISCV_FEATURE_PMP)) {
+-    RISCVException ret = riscv_csrrw_check(env, csrno, write_mask);
-@@ -XXX,XX +XXX,XX @@ static RISCVException write_pmpaddr(CPURISCVState *env, int csrno,
++    RISCVException ret = riscv_csrrw_check(env, csrno, true);
      if (ret != RISCV_EXCP_NONE) {
          return ret;
      }
@@ -XXX,XX +XXX,XX @@ static RISCVException riscv_csrrw_do128(CPURISCVState *env, int csrno,
      return RISCV_EXCP_NONE;
  }
-+/*
++RISCVException riscv_csrr_i128(CPURISCVState *env, int csrno,
-+ * Functions to access Pointer Masking feature registers
++                               Int128 *ret_value)
 + * We have to check if current priv lvl could modify
 + * csr in given mode
 + */
 +static bool check_pm_current_disabled(CPURISCVState *env, int csrno)
 +{
-+    int csr_priv = get_field(csrno, 0x300);
++    RISCVException ret;
-+    int pm_current;
++
 +    ret = riscv_csrrw_check(env, csrno, false);
 +    if (ret != RISCV_EXCP_NONE) {
 +        return ret;
 +    }
 +
 +    if (csr_ops[csrno].read128) {
 +        return riscv_csrrw_do128(env, csrno, ret_value,
 +                                 int128_zero(), int128_zero());
 +    }
 +
 +    /*
-+     * If priv lvls differ that means we're accessing csr from higher priv lvl,
++     * Fall back to 64-bit version for now, if the 128-bit alternative isn't
-+     * so allow the access
++     * at all defined.
 +     * Note, some CSRs don't need to extend to MXLEN (64 upper bits non
 +     * significant), for those, this fallback is correctly handling the
 +     * accesses
 +     */
-+    if (env->priv != csr_priv) {
++    target_ulong old_value;
-+        return false;
++    ret = riscv_csrrw_do64(env, csrno, &old_value,
 +                           (target_ulong)0,
 +                           (target_ulong)0);
 +    if (ret == RISCV_EXCP_NONE && ret_value) {
 +        *ret_value = int128_make64(old_value);
 +    }
-+    switch (env->priv) {
++    return ret;
 +    case PRV_M:
 +        pm_current = get_field(env->mmte, M_PM_CURRENT);
 +        break;
 +    case PRV_S:
 +        pm_current = get_field(env->mmte, S_PM_CURRENT);
 +        break;
 +    case PRV_U:
 +        pm_current = get_field(env->mmte, U_PM_CURRENT);
 +        break;
 +    default:
 +        g_assert_not_reached();
 +    }
 +    /* It's same priv lvl, so we allow to modify csr only if pm.current==1 */
 +    return !pm_current;
 +}
 +
-+static RISCVException read_mmte(CPURISCVState *env, int csrno,
+ RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno,
-+                                target_ulong *val)
+                                 Int128 *ret_value,
-+{
+                                 Int128 new_value, Int128 write_mask)
-+    *val = env->mmte & MMTE_MASK;
+ {
-+    return RISCV_EXCP_NONE;
+     RISCVException ret;
-+}
-+
+-    ret = riscv_csrrw_check(env, csrno, int128_nz(write_mask));
-+static RISCVException write_mmte(CPURISCVState *env, int csrno,
++    ret = riscv_csrrw_check(env, csrno, true);
-+                                 target_ulong val)
+     if (ret != RISCV_EXCP_NONE) {
-+{
+         return ret;
-+    uint64_t mstatus;
+     }
-+    target_ulong wpri_val = val & MMTE_MASK;
+diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
-+
+index XXXXXXX..XXXXXXX 100644
-+    if (val != wpri_val) {
+--- a/target/riscv/op_helper.c
-+        qemu_log_mask(LOG_GUEST_ERROR, "%s" TARGET_FMT_lx " %s" TARGET_FMT_lx "\n",
++++ b/target/riscv/op_helper.c
-+                      "MMTE: WPRI violation written 0x", val,
+@@ -XXX,XX +XXX,XX @@ target_ulong helper_csrr(CPURISCVState *env, int csr)
-+                      "vs expected 0x", wpri_val);
+     }
-+    }
-+    /* for machine mode pm.current is hardwired to 1 */
+     target_ulong val = 0;
-+    wpri_val |= MMTE_M_PM_CURRENT;
+-    RISCVException ret = riscv_csrrw(env, csr, &val, 0, 0);
-+
++    RISCVException ret = riscv_csrr(env, csr, &val);
-+    /* hardwiring pm.instruction bit to 0, since it's not supported yet */
-+    wpri_val &= ~(MMTE_M_PM_INSN | MMTE_S_PM_INSN | MMTE_U_PM_INSN);
+     if (ret != RISCV_EXCP_NONE) {
-+    env->mmte = wpri_val | PM_EXT_DIRTY;
+         riscv_raise_exception(env, ret, GETPC());
-+
+@@ -XXX,XX +XXX,XX @@ target_ulong helper_csrrw(CPURISCVState *env, int csr,
-+    /* Set XS and SD bits, since PM CSRs are dirty */
+ target_ulong helper_csrr_i128(CPURISCVState *env, int csr)
-+    mstatus = env->mstatus | MSTATUS_XS;
+ {
-+    write_mstatus(env, csrno, mstatus);
+     Int128 rv = int128_zero();
-+    return RISCV_EXCP_NONE;
+-    RISCVException ret = riscv_csrrw_i128(env, csr, &rv,
-+}
+-                                          int128_zero(),
-+
+-                                          int128_zero());
-+static RISCVException read_smte(CPURISCVState *env, int csrno,
++    RISCVException ret = riscv_csrr_i128(env, csr, &rv);
-+                                target_ulong *val)
-+{
+     if (ret != RISCV_EXCP_NONE) {
-+    *val = env->mmte & SMTE_MASK;
+         riscv_raise_exception(env, ret, GETPC());
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_smte(CPURISCVState *env, int csrno,
 +                                 target_ulong val)
 +{
 +    target_ulong wpri_val = val & SMTE_MASK;
 +
 +    if (val != wpri_val) {
 +        qemu_log_mask(LOG_GUEST_ERROR, "%s" TARGET_FMT_lx " %s" TARGET_FMT_lx "\n",
 +                      "SMTE: WPRI violation written 0x", val,
 +                      "vs expected 0x", wpri_val);
 +    }
 +
 +    /* if pm.current==0 we can't modify current PM CSRs */
 +    if (check_pm_current_disabled(env, csrno)) {
 +        return RISCV_EXCP_NONE;
 +    }
 +
 +    wpri_val |= (env->mmte & ~SMTE_MASK);
 +    write_mmte(env, csrno, wpri_val);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_umte(CPURISCVState *env, int csrno,
 +                                target_ulong *val)
 +{
 +    *val = env->mmte & UMTE_MASK;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_umte(CPURISCVState *env, int csrno,
 +                                 target_ulong val)
 +{
 +    target_ulong wpri_val = val & UMTE_MASK;
 +
 +    if (val != wpri_val) {
 +        qemu_log_mask(LOG_GUEST_ERROR, "%s" TARGET_FMT_lx " %s" TARGET_FMT_lx "\n",
 +                      "UMTE: WPRI violation written 0x", val,
 +                      "vs expected 0x", wpri_val);
 +    }
 +
 +    if (check_pm_current_disabled(env, csrno)) {
 +        return RISCV_EXCP_NONE;
 +    }
 +
 +    wpri_val |= (env->mmte & ~UMTE_MASK);
 +    write_mmte(env, csrno, wpri_val);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_mpmmask(CPURISCVState *env, int csrno,
 +                                   target_ulong *val)
 +{
 +    *val = env->mpmmask;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_mpmmask(CPURISCVState *env, int csrno,
 +                                    target_ulong val)
 +{
 +    uint64_t mstatus;
 +
 +    env->mpmmask = val;
 +    env->mmte |= PM_EXT_DIRTY;
 +
 +    /* Set XS and SD bits, since PM CSRs are dirty */
 +    mstatus = env->mstatus | MSTATUS_XS;
 +    write_mstatus(env, csrno, mstatus);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_spmmask(CPURISCVState *env, int csrno,
 +                                   target_ulong *val)
 +{
 +    *val = env->spmmask;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_spmmask(CPURISCVState *env, int csrno,
 +                                    target_ulong val)
 +{
 +    uint64_t mstatus;
 +
 +    /* if pm.current==0 we can't modify current PM CSRs */
 +    if (check_pm_current_disabled(env, csrno)) {
 +        return RISCV_EXCP_NONE;
 +    }
 +    env->spmmask = val;
 +    env->mmte |= PM_EXT_DIRTY;
 +
 +    /* Set XS and SD bits, since PM CSRs are dirty */
 +    mstatus = env->mstatus | MSTATUS_XS;
 +    write_mstatus(env, csrno, mstatus);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_upmmask(CPURISCVState *env, int csrno,
 +                                   target_ulong *val)
 +{
 +    *val = env->upmmask;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_upmmask(CPURISCVState *env, int csrno,
 +                                    target_ulong val)
 +{
 +    uint64_t mstatus;
 +
 +    /* if pm.current==0 we can't modify current PM CSRs */
 +    if (check_pm_current_disabled(env, csrno)) {
 +        return RISCV_EXCP_NONE;
 +    }
 +    env->upmmask = val;
 +    env->mmte |= PM_EXT_DIRTY;
 +
 +    /* Set XS and SD bits, since PM CSRs are dirty */
 +    mstatus = env->mstatus | MSTATUS_XS;
 +    write_mstatus(env, csrno, mstatus);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_mpmbase(CPURISCVState *env, int csrno,
 +                                   target_ulong *val)
 +{
 +    *val = env->mpmbase;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_mpmbase(CPURISCVState *env, int csrno,
 +                                    target_ulong val)
 +{
 +    uint64_t mstatus;
 +
 +    env->mpmbase = val;
 +    env->mmte |= PM_EXT_DIRTY;
 +
 +    /* Set XS and SD bits, since PM CSRs are dirty */
 +    mstatus = env->mstatus | MSTATUS_XS;
 +    write_mstatus(env, csrno, mstatus);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_spmbase(CPURISCVState *env, int csrno,
 +                                   target_ulong *val)
 +{
 +    *val = env->spmbase;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_spmbase(CPURISCVState *env, int csrno,
 +                                    target_ulong val)
 +{
 +    uint64_t mstatus;
 +
 +    /* if pm.current==0 we can't modify current PM CSRs */
 +    if (check_pm_current_disabled(env, csrno)) {
 +        return RISCV_EXCP_NONE;
 +    }
 +    env->spmbase = val;
 +    env->mmte |= PM_EXT_DIRTY;
 +
 +    /* Set XS and SD bits, since PM CSRs are dirty */
 +    mstatus = env->mstatus | MSTATUS_XS;
 +    write_mstatus(env, csrno, mstatus);
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException read_upmbase(CPURISCVState *env, int csrno,
 +                                   target_ulong *val)
 +{
 +    *val = env->upmbase;
 +    return RISCV_EXCP_NONE;
 +}
 +
 +static RISCVException write_upmbase(CPURISCVState *env, int csrno,
 +                                    target_ulong val)
 +{
 +    uint64_t mstatus;
 +
 +    /* if pm.current==0 we can't modify current PM CSRs */
 +    if (check_pm_current_disabled(env, csrno)) {
 +        return RISCV_EXCP_NONE;
 +    }
 +    env->upmbase = val;
 +    env->mmte |= PM_EXT_DIRTY;
 +
 +    /* Set XS and SD bits, since PM CSRs are dirty */
 +    mstatus = env->mstatus | MSTATUS_XS;
 +    write_mstatus(env, csrno, mstatus);
 +    return RISCV_EXCP_NONE;
 +}
 +
  #endif
  /*
@@ -XXX,XX +XXX,XX @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
      [CSR_PMPADDR14] =  { "pmpaddr14", pmp, read_pmpaddr, write_pmpaddr },
      [CSR_PMPADDR15] =  { "pmpaddr15", pmp, read_pmpaddr, write_pmpaddr },
 +    /* User Pointer Masking */
 +    [CSR_UMTE]    =    { "umte",    pointer_masking, read_umte,    write_umte    },
 +    [CSR_UPMMASK] =    { "upmmask", pointer_masking, read_upmmask, write_upmmask },
 +    [CSR_UPMBASE] =    { "upmbase", pointer_masking, read_upmbase, write_upmbase },
 +    /* Machine Pointer Masking */
 +    [CSR_MMTE]    =    { "mmte",    pointer_masking, read_mmte,    write_mmte    },
 +    [CSR_MPMMASK] =    { "mpmmask", pointer_masking, read_mpmmask, write_mpmmask },
 +    [CSR_MPMBASE] =    { "mpmbase", pointer_masking, read_mpmbase, write_mpmbase },
 +    /* Supervisor Pointer Masking */
 +    [CSR_SMTE]    =    { "smte",    pointer_masking, read_smte,    write_smte    },
 +    [CSR_SPMMASK] =    { "spmmask", pointer_masking, read_spmmask, write_spmmask },
 +    [CSR_SPMBASE] =    { "spmbase", pointer_masking, read_spmbase, write_spmbase },
 +
      /* Performance Counters */
      [CSR_HPMCOUNTER3]    = { "hpmcounter3",    ctr,    read_zero },
      [CSR_HPMCOUNTER4]    = { "hpmcounter4",    ctr,    read_zero },
 --
-.31.1
+.45.1

From: Alistair Francis <alistair.francis@wdc.com>

The following changes since commit c52d69e7dbaaed0ffdef8125e79218672c30161d:

Merge remote-tracking branch 'remotes/cschoenebeck/tags/pull-9p-20211027' into staging (2021-10-27 11:45:18 -0700)

are available in the Git repository at:

git@github.com:alistair23/qemu.git tags/pull-riscv-to-apply-20211028

for you to fetch changes up to 344b61e1478c8eb37e81b96f63d8f5071f5a38e1:

target/riscv: remove force HS exception (2021-10-28 14:39:23 +1000)

----------------------------------------------------------------
Fifth RISC-V PR for QEMU 6.2

- Use a shared PLIC config helper function
 - Fixup the OpenTitan PLIC configuration
 - Add support for the experimental J extension
 - Update the fmin/fmax handling
 - Fixup VS interrupt forwarding

----------------------------------------------------------------
Alexey Baturo (7):
      target/riscv: Add J-extension into RISC-V
      target/riscv: Add CSR defines for RISC-V PM extension
      target/riscv: Support CSRs required for RISC-V PM extension except for the h-mode
      target/riscv: Add J extension state description
      target/riscv: Print new PM CSRs in QEMU logs
      target/riscv: Support pointer masking for RISC-V for i/c/f/d/a types of instructions
      target/riscv: Allow experimental J-ext to be turned on

Alistair Francis (6):
      hw/riscv: virt: Don't use a macro for the PLIC configuration
      hw/riscv: boot: Add a PLIC config string function
      hw/riscv: sifive_u: Use the PLIC config helper function
      hw/riscv: microchip_pfsoc: Use the PLIC config helper function
      hw/riscv: virt: Use the PLIC config helper function
      hw/riscv: opentitan: Fixup the PLIC context addresses

Anatoly Parshintsev (1):
      target/riscv: Implement address masking functions required for RISC-V Pointer Masking extension

Chih-Min Chao (2):
      softfloat: add APIs to handle alternative sNaN propagation for fmax/fmin
      target/riscv: change the api for RVF/RVD fmin/fmax

Jose Martins (2):
      target/riscv: fix VS interrupts forwarding to HS
      target/riscv: remove force HS exception

From: Alistair Francis <alistair.francis@wdc.com>

Using a macro for the PLIC configuration doesn't make the code any
easier to read. Instead it makes it harder to figure out what is going
on, so let's remove it.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20211022060133.3045020-1-alistair.francis@opensource.wdc.com
---
 include/hw/riscv/virt.h | 1 -
 hw/riscv/virt.c         | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
index XXXXXXX..XXXXXXX 100644
--- a/include/hw/riscv/virt.h
+++ b/include/hw/riscv/virt.h
@@ -XXX,XX +XXX,XX @@ enum {
     VIRTIO_NDEV = 0x35 /* Arbitrary maximum number of interrupts */
 };
 
-#define VIRT_PLIC_HART_CONFIG "MS"
 #define VIRT_PLIC_NUM_SOURCES 127
 #define VIRT_PLIC_NUM_PRIORITIES 7
 #define VIRT_PLIC_PRIORITY_BASE 0x04
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -XXX,XX +XXX,XX @@ static char *plic_hart_config_string(int hart_count)
     int i;
 
     for (i = 0; i < hart_count; i++) {
-        vals[i] = VIRT_PLIC_HART_CONFIG;
+        vals[i] = "MS";
     }
     vals[i] = NULL;
 
-- 
2.31.1

From: Alistair Francis <alistair.francis@wdc.com>

Add a generic function that can create the PLIC strings.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211022060133.3045020-2-alistair.francis@opensource.wdc.com
---
 include/hw/riscv/boot.h |  2 ++
 hw/riscv/boot.c         | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h
index XXXXXXX..XXXXXXX 100644
--- a/include/hw/riscv/boot.h
+++ b/include/hw/riscv/boot.h
@@ -XXX,XX +XXX,XX @@
 
 bool riscv_is_32bit(RISCVHartArrayState *harts);
 
+char *riscv_plic_hart_config_string(int hart_count);
+
 target_ulong riscv_calc_kernel_start_addr(RISCVHartArrayState *harts,
                                           target_ulong firmware_end_addr);
 target_ulong riscv_find_and_load_firmware(MachineState *machine,
diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -XXX,XX +XXX,XX @@ bool riscv_is_32bit(RISCVHartArrayState *harts)
     return harts->harts[0].env.misa_mxl_max == MXL_RV32;
 }
 
+/*
+ * Return the per-socket PLIC hart topology configuration string
+ * (caller must free with g_free())
+ */
+char *riscv_plic_hart_config_string(int hart_count)
+{
+    g_autofree const char **vals = g_new(const char *, hart_count + 1);
+    int i;
+
+    for (i = 0; i < hart_count; i++) {
+        CPUState *cs = qemu_get_cpu(i);
+        CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+        if (riscv_has_ext(env, RVS)) {
+            vals[i] = "MS";
+        } else {
+            vals[i] = "M";
+        }
+    }
+    vals[i] = NULL;
+
+    /* g_strjoinv() obliges us to cast away const here */
+    return g_strjoinv(",", (char **)vals);
+}
+
 target_ulong riscv_calc_kernel_start_addr(RISCVHartArrayState *harts,
                                           target_ulong firmware_end_addr) {
     if (riscv_is_32bit(harts)) {
-- 
2.31.1

From: Alistair Francis <alistair.francis@wdc.com>

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211022060133.3045020-3-alistair.francis@opensource.wdc.com
---
 include/hw/riscv/sifive_u.h |  1 -
 hw/riscv/sifive_u.c         | 14 +-------------
 2 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
index XXXXXXX..XXXXXXX 100644
--- a/include/hw/riscv/sifive_u.h
+++ b/include/hw/riscv/sifive_u.h
@@ -XXX,XX +XXX,XX @@ enum {
 #define SIFIVE_U_MANAGEMENT_CPU_COUNT   1
 #define SIFIVE_U_COMPUTE_CPU_COUNT      4
 
-#define SIFIVE_U_PLIC_HART_CONFIG "MS"
 #define SIFIVE_U_PLIC_NUM_SOURCES 54
 #define SIFIVE_U_PLIC_NUM_PRIORITIES 7
 #define SIFIVE_U_PLIC_PRIORITY_BASE 0x04
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -XXX,XX +XXX,XX @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
     MemoryRegion *l2lim_mem = g_new(MemoryRegion, 1);
     char *plic_hart_config;
-    size_t plic_hart_config_len;
     int i, j;
     NICInfo *nd = &nd_table[0];
 
@@ -XXX,XX +XXX,XX @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
                                 l2lim_mem);
 
     /* create PLIC hart topology configuration string */
-    plic_hart_config_len = (strlen(SIFIVE_U_PLIC_HART_CONFIG) + 1) *
-                           ms->smp.cpus;
-    plic_hart_config = g_malloc0(plic_hart_config_len);
-    for (i = 0; i < ms->smp.cpus; i++) {
-        if (i != 0) {
-            strncat(plic_hart_config, "," SIFIVE_U_PLIC_HART_CONFIG,
-                    plic_hart_config_len);
-        } else {
-            strncat(plic_hart_config, "M", plic_hart_config_len);
-        }
-        plic_hart_config_len -= (strlen(SIFIVE_U_PLIC_HART_CONFIG) + 1);
-    }
+    plic_hart_config = riscv_plic_hart_config_string(ms->smp.cpus);
 
     /* MMIO */
     s->plic = sifive_plic_create(memmap[SIFIVE_U_DEV_PLIC].base,
-- 
2.31.1

From: Alistair Francis <alistair.francis@wdc.com>

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211022060133.3045020-4-alistair.francis@opensource.wdc.com
---
 include/hw/riscv/microchip_pfsoc.h |  1 -
 hw/riscv/microchip_pfsoc.c         | 14 +-------------
 2 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/include/hw/riscv/microchip_pfsoc.h b/include/hw/riscv/microchip_pfsoc.h
index XXXXXXX..XXXXXXX 100644
--- a/include/hw/riscv/microchip_pfsoc.h
+++ b/include/hw/riscv/microchip_pfsoc.h
@@ -XXX,XX +XXX,XX @@ enum {
 #define MICROCHIP_PFSOC_MANAGEMENT_CPU_COUNT    1
 #define MICROCHIP_PFSOC_COMPUTE_CPU_COUNT       4
 
-#define MICROCHIP_PFSOC_PLIC_HART_CONFIG        "MS"
 #define MICROCHIP_PFSOC_PLIC_NUM_SOURCES        185
 #define MICROCHIP_PFSOC_PLIC_NUM_PRIORITIES     7
 #define MICROCHIP_PFSOC_PLIC_PRIORITY_BASE      0x04
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -XXX,XX +XXX,XX @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, Error **errp)
     MemoryRegion *envm_data = g_new(MemoryRegion, 1);
     MemoryRegion *qspi_xip_mem = g_new(MemoryRegion, 1);
     char *plic_hart_config;
-    size_t plic_hart_config_len;
     NICInfo *nd;
     int i;
 
@@ -XXX,XX +XXX,XX @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, Error **errp)
                                 l2lim_mem);
 
     /* create PLIC hart topology configuration string */
-    plic_hart_config_len = (strlen(MICROCHIP_PFSOC_PLIC_HART_CONFIG) + 1) *
-                           ms->smp.cpus;
-    plic_hart_config = g_malloc0(plic_hart_config_len);
-    for (i = 0; i < ms->smp.cpus; i++) {
-        if (i != 0) {
-            strncat(plic_hart_config, "," MICROCHIP_PFSOC_PLIC_HART_CONFIG,
-                    plic_hart_config_len);
-        } else {
-            strncat(plic_hart_config, "M", plic_hart_config_len);
-        }
-        plic_hart_config_len -= (strlen(MICROCHIP_PFSOC_PLIC_HART_CONFIG) + 1);
-    }
+    plic_hart_config = riscv_plic_hart_config_string(ms->smp.cpus);
 
     /* PLIC */
     s->plic = sifive_plic_create(memmap[MICROCHIP_PFSOC_PLIC].base,
-- 
2.31.1

From: Alistair Francis <alistair.francis@wdc.com>

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211022060133.3045020-5-alistair.francis@opensource.wdc.com
---
 hw/riscv/virt.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -XXX,XX +XXX,XX @@ static FWCfgState *create_fw_cfg(const MachineState *mc)
     return fw_cfg;
 }
 
-/*
- * Return the per-socket PLIC hart topology configuration string
- * (caller must free with g_free())
- */
-static char *plic_hart_config_string(int hart_count)
-{
-    g_autofree const char **vals = g_new(const char *, hart_count + 1);
-    int i;
-
-    for (i = 0; i < hart_count; i++) {
-        vals[i] = "MS";
-    }
-    vals[i] = NULL;
-
-    /* g_strjoinv() obliges us to cast away const here */
-    return g_strjoinv(",", (char **)vals);
-}
-
 static void virt_machine_init(MachineState *machine)
 {
     const MemMapEntry *memmap = virt_memmap;
@@ -XXX,XX +XXX,XX @@ static void virt_machine_init(MachineState *machine)
         }
 
         /* Per-socket PLIC hart topology configuration string */
-        plic_hart_config = plic_hart_config_string(hart_count);
+        plic_hart_config = riscv_plic_hart_config_string(hart_count);
 
         /* Per-socket PLIC */
         s->plic[i] = sifive_plic_create(
-- 
2.31.1

From: Alistair Francis <alistair.francis@wdc.com>

Fixup the PLIC context address to correctly support the threshold and
claim register.

Fixes: ef63100648 ("hw/riscv: opentitan: Update to the latest build")
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211025040657.262696-1-alistair.francis@opensource.wdc.com
---
 hw/riscv/opentitan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/riscv/opentitan.c b/hw/riscv/opentitan.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/opentitan.c
+++ b/hw/riscv/opentitan.c
@@ -XXX,XX +XXX,XX @@ static void lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
     qdev_prop_set_uint32(DEVICE(&s->plic), "pending-base", 0x1000);
     qdev_prop_set_uint32(DEVICE(&s->plic), "enable-base", 0x2000);
     qdev_prop_set_uint32(DEVICE(&s->plic), "enable-stride", 0x18);
-    qdev_prop_set_uint32(DEVICE(&s->plic), "context-base", 0x200004);
-    qdev_prop_set_uint32(DEVICE(&s->plic), "context-stride", 4);
+    qdev_prop_set_uint32(DEVICE(&s->plic), "context-base", 0x200000);
+    qdev_prop_set_uint32(DEVICE(&s->plic), "context-stride", 8);
     qdev_prop_set_uint32(DEVICE(&s->plic), "aperture-size", memmap[IBEX_DEV_PLIC].size);
 
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {
-- 
2.31.1

From: Alexey Baturo <baturo.alexey@gmail.com>

Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20211025173609.2724490-2-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@
 #define RVS RV('S')
 #define RVU RV('U')
 #define RVH RV('H')
+#define RVJ RV('J')
 
 /* S extension denotes that Supervisor mode exists, however it is possible
    to have a core that support S mode but does not have an MMU and there
@@ -XXX,XX +XXX,XX @@ struct RISCVCPU {
         bool ext_s;
         bool ext_u;
         bool ext_h;
+        bool ext_j;
         bool ext_v;
         bool ext_zba;
         bool ext_zbb;
-- 
2.31.1

From: Alexey Baturo <baturo.alexey@gmail.com>

Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211025173609.2724490-3-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_bits.h | 96 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -XXX,XX +XXX,XX @@
 #define CSR_MHPMCOUNTER30H  0xb9e
 #define CSR_MHPMCOUNTER31H  0xb9f
 
+/*
+ * User PointerMasking registers
+ * NB: actual CSR numbers might be changed in future
+ */
+#define CSR_UMTE            0x4c0
+#define CSR_UPMMASK         0x4c1
+#define CSR_UPMBASE         0x4c2
+
+/*
+ * Machine PointerMasking registers
+ * NB: actual CSR numbers might be changed in future
+ */
+#define CSR_MMTE            0x3c0
+#define CSR_MPMMASK         0x3c1
+#define CSR_MPMBASE         0x3c2
+
+/*
+ * Supervisor PointerMaster registers
+ * NB: actual CSR numbers might be changed in future
+ */
+#define CSR_SMTE            0x1c0
+#define CSR_SPMMASK         0x1c1
+#define CSR_SPMBASE         0x1c2
+
+/*
+ * Hypervisor PointerMaster registers
+ * NB: actual CSR numbers might be changed in future
+ */
+#define CSR_VSMTE           0x2c0
+#define CSR_VSPMMASK        0x2c1
+#define CSR_VSPMBASE        0x2c2
+
 /* mstatus CSR bits */
 #define MSTATUS_UIE         0x00000001
 #define MSTATUS_SIE         0x00000002
@@ -XXX,XX +XXX,XX @@ typedef enum RISCVException {
 #define MIE_UTIE                           (1 << IRQ_U_TIMER)
 #define MIE_SSIE                           (1 << IRQ_S_SOFT)
 #define MIE_USIE                           (1 << IRQ_U_SOFT)
+
+/* General PointerMasking CSR bits*/
+#define PM_ENABLE       0x00000001ULL
+#define PM_CURRENT      0x00000002ULL
+#define PM_INSN         0x00000004ULL
+#define PM_XS_MASK      0x00000003ULL
+
+/* PointerMasking XS bits values */
+#define PM_EXT_DISABLE  0x00000000ULL
+#define PM_EXT_INITIAL  0x00000001ULL
+#define PM_EXT_CLEAN    0x00000002ULL
+#define PM_EXT_DIRTY    0x00000003ULL
+
+/* Offsets for every pair of control bits per each priv level */
+#define XS_OFFSET    0ULL
+#define U_OFFSET     2ULL
+#define S_OFFSET     5ULL
+#define M_OFFSET     8ULL
+
+#define PM_XS_BITS   (PM_XS_MASK << XS_OFFSET)
+#define U_PM_ENABLE  (PM_ENABLE  << U_OFFSET)
+#define U_PM_CURRENT (PM_CURRENT << U_OFFSET)
+#define U_PM_INSN    (PM_INSN    << U_OFFSET)
+#define S_PM_ENABLE  (PM_ENABLE  << S_OFFSET)
+#define S_PM_CURRENT (PM_CURRENT << S_OFFSET)
+#define S_PM_INSN    (PM_INSN    << S_OFFSET)
+#define M_PM_ENABLE  (PM_ENABLE  << M_OFFSET)
+#define M_PM_CURRENT (PM_CURRENT << M_OFFSET)
+#define M_PM_INSN    (PM_INSN    << M_OFFSET)
+
+/* mmte CSR bits */
+#define MMTE_PM_XS_BITS     PM_XS_BITS
+#define MMTE_U_PM_ENABLE    U_PM_ENABLE
+#define MMTE_U_PM_CURRENT   U_PM_CURRENT
+#define MMTE_U_PM_INSN      U_PM_INSN
+#define MMTE_S_PM_ENABLE    S_PM_ENABLE
+#define MMTE_S_PM_CURRENT   S_PM_CURRENT
+#define MMTE_S_PM_INSN      S_PM_INSN
+#define MMTE_M_PM_ENABLE    M_PM_ENABLE
+#define MMTE_M_PM_CURRENT   M_PM_CURRENT
+#define MMTE_M_PM_INSN      M_PM_INSN
+#define MMTE_MASK    (MMTE_U_PM_ENABLE | MMTE_U_PM_CURRENT | MMTE_U_PM_INSN | \
+                      MMTE_S_PM_ENABLE | MMTE_S_PM_CURRENT | MMTE_S_PM_INSN | \
+                      MMTE_M_PM_ENABLE | MMTE_M_PM_CURRENT | MMTE_M_PM_INSN | \
+                      MMTE_PM_XS_BITS)
+
+/* (v)smte CSR bits */
+#define SMTE_PM_XS_BITS     PM_XS_BITS
+#define SMTE_U_PM_ENABLE    U_PM_ENABLE
+#define SMTE_U_PM_CURRENT   U_PM_CURRENT
+#define SMTE_U_PM_INSN      U_PM_INSN
+#define SMTE_S_PM_ENABLE    S_PM_ENABLE
+#define SMTE_S_PM_CURRENT   S_PM_CURRENT
+#define SMTE_S_PM_INSN      S_PM_INSN
+#define SMTE_MASK    (SMTE_U_PM_ENABLE | SMTE_U_PM_CURRENT | SMTE_U_PM_INSN | \
+                      SMTE_S_PM_ENABLE | SMTE_S_PM_CURRENT | SMTE_S_PM_INSN | \
+                      SMTE_PM_XS_BITS)
+
+/* umte CSR bits */
+#define UMTE_U_PM_ENABLE    U_PM_ENABLE
+#define UMTE_U_PM_CURRENT   U_PM_CURRENT
+#define UMTE_U_PM_INSN      U_PM_INSN
+#define UMTE_MASK     (UMTE_U_PM_ENABLE | MMTE_U_PM_CURRENT | UMTE_U_PM_INSN)
+
 #endif
-- 
2.31.1

From: Alexey Baturo <baturo.alexey@gmail.com>

Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211025173609.2724490-4-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h |  11 ++
 target/riscv/cpu.c |   2 +
 target/riscv/csr.c | 285 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 298 insertions(+)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ struct CPURISCVState {
 
     /* True if in debugger mode.  */
     bool debugger;
+
+    /*
+     * CSRs for PointerMasking extension
+     */
+    target_ulong mmte;
+    target_ulong mpmmask;
+    target_ulong mpmbase;
+    target_ulong spmmask;
+    target_ulong spmbase;
+    target_ulong upmmask;
+    target_ulong upmbase;
 #endif
 
     float_status fp_status;
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ static void riscv_cpu_reset(DeviceState *dev)
     env->mcause = 0;
     env->pc = env->resetvec;
     env->two_stage_lookup = false;
+    /* mmte is supposed to have pm.current hardwired to 1 */
+    env->mmte |= (PM_EXT_INITIAL | MMTE_M_PM_CURRENT);
 #endif
     cs->exception_index = RISCV_EXCP_NONE;
     env->load_res = -1;
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -XXX,XX +XXX,XX @@ static RISCVException hmode32(CPURISCVState *env, int csrno)
 
 }
 
+/* Checks if PointerMasking registers could be accessed */
+static RISCVException pointer_masking(CPURISCVState *env, int csrno)
+{
+    /* Check if j-ext is present */
+    if (riscv_has_ext(env, RVJ)) {
+        return RISCV_EXCP_NONE;
+    }
+    return RISCV_EXCP_ILLEGAL_INST;
+}
+
 static RISCVException pmp(CPURISCVState *env, int csrno)
 {
     if (riscv_feature(env, RISCV_FEATURE_PMP)) {
@@ -XXX,XX +XXX,XX @@ static RISCVException write_pmpaddr(CPURISCVState *env, int csrno,
     return RISCV_EXCP_NONE;
 }
 
+/*
+ * Functions to access Pointer Masking feature registers
+ * We have to check if current priv lvl could modify
+ * csr in given mode
+ */
+static bool check_pm_current_disabled(CPURISCVState *env, int csrno)
+{
+    int csr_priv = get_field(csrno, 0x300);
+    int pm_current;
+
+    /*
+     * If priv lvls differ that means we're accessing csr from higher priv lvl,
+     * so allow the access
+     */
+    if (env->priv != csr_priv) {
+        return false;
+    }
+    switch (env->priv) {
+    case PRV_M:
+        pm_current = get_field(env->mmte, M_PM_CURRENT);
+        break;
+    case PRV_S:
+        pm_current = get_field(env->mmte, S_PM_CURRENT);
+        break;
+    case PRV_U:
+        pm_current = get_field(env->mmte, U_PM_CURRENT);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+    /* It's same priv lvl, so we allow to modify csr only if pm.current==1 */
+    return !pm_current;
+}
+
+static RISCVException read_mmte(CPURISCVState *env, int csrno,
+                                target_ulong *val)
+{
+    *val = env->mmte & MMTE_MASK;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_mmte(CPURISCVState *env, int csrno,
+                                 target_ulong val)
+{
+    uint64_t mstatus;
+    target_ulong wpri_val = val & MMTE_MASK;
+
+    if (val != wpri_val) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s" TARGET_FMT_lx " %s" TARGET_FMT_lx "\n",
+                      "MMTE: WPRI violation written 0x", val,
+                      "vs expected 0x", wpri_val);
+    }
+    /* for machine mode pm.current is hardwired to 1 */
+    wpri_val |= MMTE_M_PM_CURRENT;
+
+    /* hardwiring pm.instruction bit to 0, since it's not supported yet */
+    wpri_val &= ~(MMTE_M_PM_INSN | MMTE_S_PM_INSN | MMTE_U_PM_INSN);
+    env->mmte = wpri_val | PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_smte(CPURISCVState *env, int csrno,
+                                target_ulong *val)
+{
+    *val = env->mmte & SMTE_MASK;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_smte(CPURISCVState *env, int csrno,
+                                 target_ulong val)
+{
+    target_ulong wpri_val = val & SMTE_MASK;
+
+    if (val != wpri_val) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s" TARGET_FMT_lx " %s" TARGET_FMT_lx "\n",
+                      "SMTE: WPRI violation written 0x", val,
+                      "vs expected 0x", wpri_val);
+    }
+
+    /* if pm.current==0 we can't modify current PM CSRs */
+    if (check_pm_current_disabled(env, csrno)) {
+        return RISCV_EXCP_NONE;
+    }
+
+    wpri_val |= (env->mmte & ~SMTE_MASK);
+    write_mmte(env, csrno, wpri_val);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_umte(CPURISCVState *env, int csrno,
+                                target_ulong *val)
+{
+    *val = env->mmte & UMTE_MASK;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_umte(CPURISCVState *env, int csrno,
+                                 target_ulong val)
+{
+    target_ulong wpri_val = val & UMTE_MASK;
+
+    if (val != wpri_val) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s" TARGET_FMT_lx " %s" TARGET_FMT_lx "\n",
+                      "UMTE: WPRI violation written 0x", val,
+                      "vs expected 0x", wpri_val);
+    }
+
+    if (check_pm_current_disabled(env, csrno)) {
+        return RISCV_EXCP_NONE;
+    }
+
+    wpri_val |= (env->mmte & ~UMTE_MASK);
+    write_mmte(env, csrno, wpri_val);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_mpmmask(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    *val = env->mpmmask;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_mpmmask(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    uint64_t mstatus;
+
+    env->mpmmask = val;
+    env->mmte |= PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_spmmask(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    *val = env->spmmask;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_spmmask(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    uint64_t mstatus;
+
+    /* if pm.current==0 we can't modify current PM CSRs */
+    if (check_pm_current_disabled(env, csrno)) {
+        return RISCV_EXCP_NONE;
+    }
+    env->spmmask = val;
+    env->mmte |= PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_upmmask(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    *val = env->upmmask;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_upmmask(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    uint64_t mstatus;
+
+    /* if pm.current==0 we can't modify current PM CSRs */
+    if (check_pm_current_disabled(env, csrno)) {
+        return RISCV_EXCP_NONE;
+    }
+    env->upmmask = val;
+    env->mmte |= PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_mpmbase(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    *val = env->mpmbase;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_mpmbase(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    uint64_t mstatus;
+
+    env->mpmbase = val;
+    env->mmte |= PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_spmbase(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    *val = env->spmbase;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_spmbase(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    uint64_t mstatus;
+
+    /* if pm.current==0 we can't modify current PM CSRs */
+    if (check_pm_current_disabled(env, csrno)) {
+        return RISCV_EXCP_NONE;
+    }
+    env->spmbase = val;
+    env->mmte |= PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException read_upmbase(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    *val = env->upmbase;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_upmbase(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    uint64_t mstatus;
+
+    /* if pm.current==0 we can't modify current PM CSRs */
+    if (check_pm_current_disabled(env, csrno)) {
+        return RISCV_EXCP_NONE;
+    }
+    env->upmbase = val;
+    env->mmte |= PM_EXT_DIRTY;
+
+    /* Set XS and SD bits, since PM CSRs are dirty */
+    mstatus = env->mstatus | MSTATUS_XS;
+    write_mstatus(env, csrno, mstatus);
+    return RISCV_EXCP_NONE;
+}
+
 #endif
 
 /*
@@ -XXX,XX +XXX,XX @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
     [CSR_PMPADDR14] =  { "pmpaddr14", pmp, read_pmpaddr, write_pmpaddr },
     [CSR_PMPADDR15] =  { "pmpaddr15", pmp, read_pmpaddr, write_pmpaddr },
 
+    /* User Pointer Masking */
+    [CSR_UMTE]    =    { "umte",    pointer_masking, read_umte,    write_umte    },
+    [CSR_UPMMASK] =    { "upmmask", pointer_masking, read_upmmask, write_upmmask },
+    [CSR_UPMBASE] =    { "upmbase", pointer_masking, read_upmbase, write_upmbase },
+    /* Machine Pointer Masking */
+    [CSR_MMTE]    =    { "mmte",    pointer_masking, read_mmte,    write_mmte    },
+    [CSR_MPMMASK] =    { "mpmmask", pointer_masking, read_mpmmask, write_mpmmask },
+    [CSR_MPMBASE] =    { "mpmbase", pointer_masking, read_mpmbase, write_mpmbase },
+    /* Supervisor Pointer Masking */
+    [CSR_SMTE]    =    { "smte",    pointer_masking, read_smte,    write_smte    },
+    [CSR_SPMMASK] =    { "spmmask", pointer_masking, read_spmmask, write_spmmask },
+    [CSR_SPMBASE] =    { "spmbase", pointer_masking, read_spmbase, write_spmbase },
+
     /* Performance Counters */
     [CSR_HPMCOUNTER3]    = { "hpmcounter3",    ctr,    read_zero },
     [CSR_HPMCOUNTER4]    = { "hpmcounter4",    ctr,    read_zero },
-- 
2.31.1

From: Alexey Baturo <baturo.alexey@gmail.com>

Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211025173609.2724490-5-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/machine.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -XXX,XX +XXX,XX @@ static bool vector_needed(void *opaque)
     return riscv_has_ext(env, RVV);
 }
 
+static bool pointermasking_needed(void *opaque)
+{
+    RISCVCPU *cpu = opaque;
+    CPURISCVState *env = &cpu->env;
+
+    return riscv_has_ext(env, RVJ);
+}
+
 static const VMStateDescription vmstate_vector = {
     .name = "cpu/vector",
     .version_id = 1,
@@ -XXX,XX +XXX,XX @@ static const VMStateDescription vmstate_vector = {
         }
 };
 
+static const VMStateDescription vmstate_pointermasking = {
+    .name = "cpu/pointer_masking",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = pointermasking_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINTTL(env.mmte, RISCVCPU),
+        VMSTATE_UINTTL(env.mpmmask, RISCVCPU),
+        VMSTATE_UINTTL(env.mpmbase, RISCVCPU),
+        VMSTATE_UINTTL(env.spmmask, RISCVCPU),
+        VMSTATE_UINTTL(env.spmbase, RISCVCPU),
+        VMSTATE_UINTTL(env.upmmask, RISCVCPU),
+        VMSTATE_UINTTL(env.upmbase, RISCVCPU),
+
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription vmstate_hyper = {
     .name = "cpu/hyper",
     .version_id = 1,
@@ -XXX,XX +XXX,XX @@ const VMStateDescription vmstate_riscv_cpu = {
         &vmstate_pmp,
         &vmstate_hyper,
         &vmstate_vector,
+        &vmstate_pointermasking,
         NULL
     }
 };
-- 
2.31.1

From: Alexey Baturo <baturo.alexey@gmail.com>

Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211025173609.2724490-7-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/translate.c                | 8 ++++++++
 target/riscv/insn_trans/trans_rva.c.inc | 3 +++
 target/riscv/insn_trans/trans_rvd.c.inc | 2 ++
 target/riscv/insn_trans/trans_rvf.c.inc | 2 ++
 target/riscv/insn_trans/trans_rvi.c.inc | 2 ++
 5 files changed, 17 insertions(+)

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -XXX,XX +XXX,XX @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong imm)
     ctx->base.is_jmp = DISAS_NORETURN;
 }
 
+/*
+ * Temp stub: generates address adjustment for PointerMasking
+ */
+static TCGv gen_pm_adjust_address(DisasContext *s, TCGv src)
+{
+    return src;
+}
+
 #ifndef CONFIG_USER_ONLY
 /* The states of mstatus_fs are:
  * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty
diff --git a/target/riscv/insn_trans/trans_rva.c.inc b/target/riscv/insn_trans/trans_rva.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rva.c.inc
+++ b/target/riscv/insn_trans/trans_rva.c.inc
@@ -XXX,XX +XXX,XX @@ static bool gen_lr(DisasContext *ctx, arg_atomic *a, MemOp mop)
     if (a->rl) {
         tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
     }
+    src1 = gen_pm_adjust_address(ctx, src1);
     tcg_gen_qemu_ld_tl(load_val, src1, ctx->mem_idx, mop);
     if (a->aq) {
         tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
@@ -XXX,XX +XXX,XX @@ static bool gen_sc(DisasContext *ctx, arg_atomic *a, MemOp mop)
     TCGLabel *l2 = gen_new_label();
 
     src1 = get_gpr(ctx, a->rs1, EXT_ZERO);
+    src1 = gen_pm_adjust_address(ctx, src1);
     tcg_gen_brcond_tl(TCG_COND_NE, load_res, src1, l1);
 
     /*
@@ -XXX,XX +XXX,XX @@ static bool gen_amo(DisasContext *ctx, arg_atomic *a,
     TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE);
     TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE);
 
+    src1 = gen_pm_adjust_address(ctx, src1);
     func(dest, src1, src2, ctx->mem_idx, mop);
 
     gen_set_gpr(ctx, a->rd, dest);
diff --git a/target/riscv/insn_trans/trans_rvd.c.inc b/target/riscv/insn_trans/trans_rvd.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvd.c.inc
+++ b/target/riscv/insn_trans/trans_rvd.c.inc
@@ -XXX,XX +XXX,XX @@ static bool trans_fld(DisasContext *ctx, arg_fld *a)
         tcg_gen_addi_tl(temp, addr, a->imm);
         addr = temp;
     }
+    addr = gen_pm_adjust_address(ctx, addr);
 
     tcg_gen_qemu_ld_i64(cpu_fpr[a->rd], addr, ctx->mem_idx, MO_TEQ);
 
@@ -XXX,XX +XXX,XX @@ static bool trans_fsd(DisasContext *ctx, arg_fsd *a)
         tcg_gen_addi_tl(temp, addr, a->imm);
         addr = temp;
     }
+    addr = gen_pm_adjust_address(ctx, addr);
 
     tcg_gen_qemu_st_i64(cpu_fpr[a->rs2], addr, ctx->mem_idx, MO_TEQ);
 
diff --git a/target/riscv/insn_trans/trans_rvf.c.inc b/target/riscv/insn_trans/trans_rvf.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvf.c.inc
+++ b/target/riscv/insn_trans/trans_rvf.c.inc
@@ -XXX,XX +XXX,XX @@ static bool trans_flw(DisasContext *ctx, arg_flw *a)
         tcg_gen_addi_tl(temp, addr, a->imm);
         addr = temp;
     }
+    addr = gen_pm_adjust_address(ctx, addr);
 
     dest = cpu_fpr[a->rd];
     tcg_gen_qemu_ld_i64(dest, addr, ctx->mem_idx, MO_TEUL);
@@ -XXX,XX +XXX,XX @@ static bool trans_fsw(DisasContext *ctx, arg_fsw *a)
         tcg_gen_addi_tl(temp, addr, a->imm);
         addr = temp;
     }
+    addr = gen_pm_adjust_address(ctx, addr);
 
     tcg_gen_qemu_st_i64(cpu_fpr[a->rs2], addr, ctx->mem_idx, MO_TEUL);
 
diff --git a/target/riscv/insn_trans/trans_rvi.c.inc b/target/riscv/insn_trans/trans_rvi.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvi.c.inc
+++ b/target/riscv/insn_trans/trans_rvi.c.inc
@@ -XXX,XX +XXX,XX @@ static bool gen_load(DisasContext *ctx, arg_lb *a, MemOp memop)
         tcg_gen_addi_tl(temp, addr, a->imm);
         addr = temp;
     }
+    addr = gen_pm_adjust_address(ctx, addr);
 
     tcg_gen_qemu_ld_tl(dest, addr, ctx->mem_idx, memop);
     gen_set_gpr(ctx, a->rd, dest);
@@ -XXX,XX +XXX,XX @@ static bool gen_store(DisasContext *ctx, arg_sb *a, MemOp memop)
         tcg_gen_addi_tl(temp, addr, a->imm);
         addr = temp;
     }
+    addr = gen_pm_adjust_address(ctx, addr);
 
     tcg_gen_qemu_st_tl(data, addr, ctx->mem_idx, memop);
     return true;
-- 
2.31.1

From: Anatoly Parshintsev <kupokupokupopo@gmail.com>

Signed-off-by: Anatoly Parshintsev <kupokupokupopo@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211025173609.2724490-8-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h        |  2 ++
 target/riscv/cpu_helper.c | 18 ++++++++++++++++++
 target/riscv/translate.c  | 39 +++++++++++++++++++++++++++++++++++++--
 3 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ FIELD(TB_FLAGS, HLSX, 10, 1)
 FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
 /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */
 FIELD(TB_FLAGS, XL, 13, 2)
+/* If PointerMasking should be applied */
+FIELD(TB_FLAGS, PM_ENABLED, 15, 1)
 
 #ifdef TARGET_RISCV32
 #define riscv_cpu_mxl(env)  ((void)(env), MXL_RV32)
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
         flags = FIELD_DP32(flags, TB_FLAGS, MSTATUS_HS_FS,
                            get_field(env->mstatus_hs, MSTATUS_FS));
     }
+    if (riscv_has_ext(env, RVJ)) {
+        int priv = flags & TB_FLAGS_PRIV_MMU_MASK;
+        bool pm_enabled = false;
+        switch (priv) {
+        case PRV_U:
+            pm_enabled = env->mmte & U_PM_ENABLE;
+            break;
+        case PRV_S:
+            pm_enabled = env->mmte & S_PM_ENABLE;
+            break;
+        case PRV_M:
+            pm_enabled = env->mmte & M_PM_ENABLE;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+        flags = FIELD_DP32(flags, TB_FLAGS, PM_ENABLED, pm_enabled);
+    }
 #endif
 
     flags = FIELD_DP32(flags, TB_FLAGS, XL, cpu_get_xl(env));
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -XXX,XX +XXX,XX @@ static TCGv cpu_gpr[32], cpu_pc, cpu_vl;
 static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */
 static TCGv load_res;
 static TCGv load_val;
+/* globals for PM CSRs */
+static TCGv pm_mask[4];
+static TCGv pm_base[4];
 
 #include "exec/gen-icount.h"
 
@@ -XXX,XX +XXX,XX @@ typedef struct DisasContext {
     TCGv zero;
     /* Space for 3 operands plus 1 extra for address computation. */
     TCGv temp[4];
+    /* PointerMasking extension */
+    bool pm_enabled;
+    TCGv pm_mask;
+    TCGv pm_base;
 } DisasContext;
 
 static inline bool has_ext(DisasContext *ctx, uint32_t ext)
@@ -XXX,XX +XXX,XX @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong imm)
 }
 
 /*
- * Temp stub: generates address adjustment for PointerMasking
+ * Generates address adjustment for PointerMasking
  */
 static TCGv gen_pm_adjust_address(DisasContext *s, TCGv src)
 {
-    return src;
+    TCGv temp;
+    if (!s->pm_enabled) {
+        /* Load unmodified address */
+        return src;
+    } else {
+        temp = temp_new(s);
+        tcg_gen_andc_tl(temp, src, s->pm_mask);
+        tcg_gen_or_tl(temp, temp, s->pm_base);
+        return temp;
+    }
 }
 
 #ifndef CONFIG_USER_ONLY
@@ -XXX,XX +XXX,XX @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     ctx->cs = cs;
     ctx->ntemp = 0;
     memset(ctx->temp, 0, sizeof(ctx->temp));
+    ctx->pm_enabled = FIELD_EX32(tb_flags, TB_FLAGS, PM_ENABLED);
+    int priv = tb_flags & TB_FLAGS_PRIV_MMU_MASK;
+    ctx->pm_mask = pm_mask[priv];
+    ctx->pm_base = pm_base[priv];
 
     ctx->zero = tcg_constant_tl(0);
 }
@@ -XXX,XX +XXX,XX @@ void riscv_translate_init(void)
                              "load_res");
     load_val = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_val),
                              "load_val");
+#ifndef CONFIG_USER_ONLY
+    /* Assign PM CSRs to tcg globals */
+    pm_mask[PRV_U] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmmask), "upmmask");
+    pm_base[PRV_U] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmbase), "upmbase");
+    pm_mask[PRV_S] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmmask), "spmmask");
+    pm_base[PRV_S] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmbase), "spmbase");
+    pm_mask[PRV_M] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmmask), "mpmmask");
+    pm_base[PRV_M] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmbase), "mpmbase");
+#endif
 }
-- 
2.31.1

From: Alexey Baturo <baturo.alexey@gmail.com>

Signed-off-by: Alexey Baturo <space.monkey.delivers@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20211025173609.2724490-9-space.monkey.delivers@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
             }
             set_vext_version(env, vext_version);
         }
+        if (cpu->cfg.ext_j) {
+            ext |= RVJ;
+        }
 
         set_misa(env, env->misa_mxl, ext);
     }
@@ -XXX,XX +XXX,XX @@ static Property riscv_cpu_properties[] = {
     DEFINE_PROP_BOOL("x-zbc", RISCVCPU, cfg.ext_zbc, false),
     DEFINE_PROP_BOOL("x-zbs", RISCVCPU, cfg.ext_zbs, false),
     DEFINE_PROP_BOOL("x-h", RISCVCPU, cfg.ext_h, false),
+    DEFINE_PROP_BOOL("x-j", RISCVCPU, cfg.ext_j, false),
     DEFINE_PROP_BOOL("x-v", RISCVCPU, cfg.ext_v, false),
     DEFINE_PROP_STRING("vext_spec", RISCVCPU, cfg.vext_spec),
     DEFINE_PROP_UINT16("vlen", RISCVCPU, cfg.vlen, 128),
-- 
2.31.1

From: Chih-Min Chao <chihmin.chao@sifive.com>

For "fmax/fmin ft0, ft1, ft2" and if one of the inputs is sNaN,

The original logic:
    Return NaN and set invalid flag if ft1 == sNaN || ft2 == sNan.

The alternative path:
    Set invalid flag if ft1 == sNaN || ft2 == sNaN.
    Return NaN only if ft1 == NaN && ft2 == NaN.

The IEEE 754 spec allows both implementation and some architecture such
as riscv choose different defintions in two spec versions.
(riscv-spec-v2.2 use original version, riscv-spec-20191213 changes to
 alternative)

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20211016085428.3001501-2-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 include/fpu/softfloat.h   | 10 ++++++++++
 fpu/softfloat.c           | 19 +++++++++++++------
 fpu/softfloat-parts.c.inc | 25 +++++++++++++++++++++++--
 3 files changed, 46 insertions(+), 8 deletions(-)

diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index XXXXXXX..XXXXXXX 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -XXX,XX +XXX,XX @@ float16 float16_minnum(float16, float16, float_status *status);
 float16 float16_maxnum(float16, float16, float_status *status);
 float16 float16_minnummag(float16, float16, float_status *status);
 float16 float16_maxnummag(float16, float16, float_status *status);
+float16 float16_minimum_number(float16, float16, float_status *status);
+float16 float16_maximum_number(float16, float16, float_status *status);
 float16 float16_sqrt(float16, float_status *status);
 FloatRelation float16_compare(float16, float16, float_status *status);
 FloatRelation float16_compare_quiet(float16, float16, float_status *status);
@@ -XXX,XX +XXX,XX @@ bfloat16 bfloat16_minnum(bfloat16, bfloat16, float_status *status);
 bfloat16 bfloat16_maxnum(bfloat16, bfloat16, float_status *status);
 bfloat16 bfloat16_minnummag(bfloat16, bfloat16, float_status *status);
 bfloat16 bfloat16_maxnummag(bfloat16, bfloat16, float_status *status);
+bfloat16 bfloat16_minimum_number(bfloat16, bfloat16, float_status *status);
+bfloat16 bfloat16_maximum_number(bfloat16, bfloat16, float_status *status);
 bfloat16 bfloat16_sqrt(bfloat16, float_status *status);
 FloatRelation bfloat16_compare(bfloat16, bfloat16, float_status *status);
 FloatRelation bfloat16_compare_quiet(bfloat16, bfloat16, float_status *status);
@@ -XXX,XX +XXX,XX @@ float32 float32_minnum(float32, float32, float_status *status);
 float32 float32_maxnum(float32, float32, float_status *status);
 float32 float32_minnummag(float32, float32, float_status *status);
 float32 float32_maxnummag(float32, float32, float_status *status);
+float32 float32_minimum_number(float32, float32, float_status *status);
+float32 float32_maximum_number(float32, float32, float_status *status);
 bool float32_is_quiet_nan(float32, float_status *status);
 bool float32_is_signaling_nan(float32, float_status *status);
 float32 float32_silence_nan(float32, float_status *status);
@@ -XXX,XX +XXX,XX @@ float64 float64_minnum(float64, float64, float_status *status);
 float64 float64_maxnum(float64, float64, float_status *status);
 float64 float64_minnummag(float64, float64, float_status *status);
 float64 float64_maxnummag(float64, float64, float_status *status);
+float64 float64_minimum_number(float64, float64, float_status *status);
+float64 float64_maximum_number(float64, float64, float_status *status);
 bool float64_is_quiet_nan(float64 a, float_status *status);
 bool float64_is_signaling_nan(float64, float_status *status);
 float64 float64_silence_nan(float64, float_status *status);
@@ -XXX,XX +XXX,XX @@ float128 float128_minnum(float128, float128, float_status *status);
 float128 float128_maxnum(float128, float128, float_status *status);
 float128 float128_minnummag(float128, float128, float_status *status);
 float128 float128_maxnummag(float128, float128, float_status *status);
+float128 float128_minimum_number(float128, float128, float_status *status);
+float128 float128_maximum_number(float128, float128, float_status *status);
 bool float128_is_quiet_nan(float128, float_status *status);
 bool float128_is_signaling_nan(float128, float_status *status);
 float128 float128_silence_nan(float128, float_status *status);
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index XXXXXXX..XXXXXXX 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -XXX,XX +XXX,XX @@ enum {
     minmax_isnum = 2,
     /* Set for the IEEE 754-2008 minNumMag() and minNumMag() operations. */
     minmax_ismag = 4,
+    /*
+     * Set for the IEEE 754-2019 minimumNumber() and maximumNumber()
+     * operations.
+     */
+    minmax_isnumber = 8,
 };
 
 /* Simple helpers for checking if, or what kind of, NaN we have */
@@ -XXX,XX +XXX,XX @@ static float128 float128_minmax(float128 a, float128 b,
     { return type##_minmax(a, b, s, flags); }
 
 #define MINMAX_2(type) \
-    MINMAX_1(type, max, 0)                                      \
-    MINMAX_1(type, maxnum, minmax_isnum)                        \
-    MINMAX_1(type, maxnummag, minmax_isnum | minmax_ismag)      \
-    MINMAX_1(type, min, minmax_ismin)                           \
-    MINMAX_1(type, minnum, minmax_ismin | minmax_isnum)         \
-    MINMAX_1(type, minnummag, minmax_ismin | minmax_isnum | minmax_ismag)
+    MINMAX_1(type, max, 0)                                                \
+    MINMAX_1(type, maxnum, minmax_isnum)                                  \
+    MINMAX_1(type, maxnummag, minmax_isnum | minmax_ismag)                \
+    MINMAX_1(type, maximum_number, minmax_isnumber)                       \
+    MINMAX_1(type, min, minmax_ismin)                                     \
+    MINMAX_1(type, minnum, minmax_ismin | minmax_isnum)                   \
+    MINMAX_1(type, minnummag, minmax_ismin | minmax_isnum | minmax_ismag) \
+    MINMAX_1(type, minimum_number, minmax_ismin | minmax_isnumber)        \
 
 MINMAX_2(float16)
 MINMAX_2(bfloat16)
diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/fpu/softfloat-parts.c.inc
+++ b/fpu/softfloat-parts.c.inc
@@ -XXX,XX +XXX,XX @@ static FloatPartsN *partsN(minmax)(FloatPartsN *a, FloatPartsN *b,
 
     if (unlikely(ab_mask & float_cmask_anynan)) {
         /*
-         * For minnum/maxnum, if one operand is a QNaN, and the other
+         * For minNum/maxNum (IEEE 754-2008)
+         * or minimumNumber/maximumNumber (IEEE 754-2019),
+         * if one operand is a QNaN, and the other
          * operand is numerical, then return numerical argument.
          */
-        if ((flags & minmax_isnum)
+        if ((flags & (minmax_isnum | minmax_isnumber))
             && !(ab_mask & float_cmask_snan)
             && (ab_mask & ~float_cmask_qnan)) {
             return is_nan(a->cls) ? b : a;
         }
+
+        /*
+         * In IEEE 754-2019, minNum, maxNum, minNumMag and maxNumMag
+         * are removed and replaced with minimum, minimumNumber, maximum
+         * and maximumNumber.
+         * minimumNumber/maximumNumber behavior for SNaN is changed to:
+         *   If both operands are NaNs, a QNaN is returned.
+         *   If either operand is a SNaN,
+         *   an invalid operation exception is signaled,
+         *   but unless both operands are NaNs,
+         *   the SNaN is otherwise ignored and not converted to a QNaN.
+         */
+        if ((flags & minmax_isnumber)
+            && (ab_mask & float_cmask_snan)
+            && (ab_mask & ~float_cmask_anynan)) {
+            float_raise(float_flag_invalid, s);
+            return is_nan(a->cls) ? b : a;
+        }
+
         return parts_pick_nan(a, b, s);
     }
 
-- 
2.31.1

From: Chih-Min Chao <chihmin.chao@sifive.com>

The sNaN propagation behavior has been changed since
cd20cee7 in https://github.com/riscv/riscv-isa-manual.

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211016085428.3001501-3-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/fpu_helper.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/target/riscv/fpu_helper.c b/target/riscv/fpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/fpu_helper.c
+++ b/target/riscv/fpu_helper.c
@@ -XXX,XX +XXX,XX @@ uint64_t helper_fmin_s(CPURISCVState *env, uint64_t rs1, uint64_t rs2)
 {
     float32 frs1 = check_nanbox_s(rs1);
     float32 frs2 = check_nanbox_s(rs2);
-    return nanbox_s(float32_minnum(frs1, frs2, &env->fp_status));
+    return nanbox_s(env->priv_ver < PRIV_VERSION_1_11_0 ?
+                    float32_minnum(frs1, frs2, &env->fp_status) :
+                    float32_minimum_number(frs1, frs2, &env->fp_status));
 }
 
 uint64_t helper_fmax_s(CPURISCVState *env, uint64_t rs1, uint64_t rs2)
 {
     float32 frs1 = check_nanbox_s(rs1);
     float32 frs2 = check_nanbox_s(rs2);
-    return nanbox_s(float32_maxnum(frs1, frs2, &env->fp_status));
+    return nanbox_s(env->priv_ver < PRIV_VERSION_1_11_0 ?
+                    float32_maxnum(frs1, frs2, &env->fp_status) :
+                    float32_maximum_number(frs1, frs2, &env->fp_status));
 }
 
 uint64_t helper_fsqrt_s(CPURISCVState *env, uint64_t rs1)
@@ -XXX,XX +XXX,XX @@ uint64_t helper_fdiv_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
 
 uint64_t helper_fmin_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
 {
-    return float64_minnum(frs1, frs2, &env->fp_status);
+    return env->priv_ver < PRIV_VERSION_1_11_0 ?
+            float64_minnum(frs1, frs2, &env->fp_status) :
+            float64_minimum_number(frs1, frs2, &env->fp_status);
 }
 
 uint64_t helper_fmax_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
 {
-    return float64_maxnum(frs1, frs2, &env->fp_status);
+    return env->priv_ver < PRIV_VERSION_1_11_0 ?
+            float64_maxnum(frs1, frs2, &env->fp_status) :
+            float64_maximum_number(frs1, frs2, &env->fp_status);
 }
 
 uint64_t helper_fcvt_s_d(CPURISCVState *env, uint64_t rs1)
-- 
2.31.1

From: Jose Martins <josemartins90@gmail.com>

VS interrupts (2, 6, 10) were not correctly forwarded to hs-mode when
not delegated in hideleg (which was not being taken into account). This
was mainly because hs level sie was not always considered enabled when
it should. The spec states that "Interrupts for higher-privilege modes,
y>x, are always globally enabled regardless of the setting of the global
yIE bit for the higher-privilege mode." and also "For purposes of
interrupt global enables, HS-mode is considered more privileged than
VS-mode, and VS-mode is considered more privileged than VU-mode". Also,
vs-level interrupts were not being taken into account unless V=1, but
should be unless delegated.

Finally, there is no need for a special case for to handle vs interrupts
as the current privilege level, the state of the global ie and of the
delegation registers should be enough to route all interrupts to the
appropriate privilege level in riscv_cpu_do_interrupt.

Signed-off-by: Jose Martins <josemartins90@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211026145126.11025-2-josemartins90@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_helper.c | 28 ++++++++--------------------
 1 file changed, 8 insertions(+), 20 deletions(-)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
 #ifndef CONFIG_USER_ONLY
 static int riscv_cpu_local_irq_pending(CPURISCVState *env)
 {
-    target_ulong irqs;
+    target_ulong virt_enabled = riscv_cpu_virt_enabled(env);
 
     target_ulong mstatus_mie = get_field(env->mstatus, MSTATUS_MIE);
     target_ulong mstatus_sie = get_field(env->mstatus, MSTATUS_SIE);
-    target_ulong hs_mstatus_sie = get_field(env->mstatus_hs, MSTATUS_SIE);
 
-    target_ulong pending = env->mip & env->mie &
-                               ~(MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
-    target_ulong vspending = (env->mip & env->mie &
-                              (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP));
+    target_ulong pending = env->mip & env->mie;
 
     target_ulong mie    = env->priv < PRV_M ||
                           (env->priv == PRV_M && mstatus_mie);
     target_ulong sie    = env->priv < PRV_S ||
                           (env->priv == PRV_S && mstatus_sie);
-    target_ulong hs_sie = env->priv < PRV_S ||
-                          (env->priv == PRV_S && hs_mstatus_sie);
+    target_ulong hsie   = virt_enabled || sie;
+    target_ulong vsie   = virt_enabled && sie;
 
-    if (riscv_cpu_virt_enabled(env)) {
-        target_ulong pending_hs_irq = pending & -hs_sie;
-
-        if (pending_hs_irq) {
-            riscv_cpu_set_force_hs_excep(env, FORCE_HS_EXCEP);
-            return ctz64(pending_hs_irq);
-        }
-
-        pending = vspending;
-    }
-
-    irqs = (pending & ~env->mideleg & -mie) | (pending &  env->mideleg & -sie);
+    target_ulong irqs =
+            (pending & ~env->mideleg & -mie) |
+            (pending &  env->mideleg & ~env->hideleg & -hsie) |
+            (pending &  env->mideleg &  env->hideleg & -vsie);
 
     if (irqs) {
         return ctz64(irqs); /* since non-zero */
-- 
2.31.1

From: Jose Martins <josemartins90@gmail.com>

There is no need to "force an hs exception" as the current privilege
level, the state of the global ie and of the delegation registers should
be enough to route the interrupt to the appropriate privilege level in
riscv_cpu_do_interrupt. The is true for both asynchronous and
synchronous exceptions, specifically, guest page faults which must be
hardwired to zero hedeleg. As such the hs_force_except mechanism can be
removed.

Signed-off-by: Jose Martins <josemartins90@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211026145126.11025-3-josemartins90@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h        |  2 --
 target/riscv/cpu_bits.h   |  6 ------
 target/riscv/cpu_helper.c | 26 +-------------------------
 3 files changed, 1 insertion(+), 33 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 bool riscv_cpu_fp_enabled(CPURISCVState *env);
 bool riscv_cpu_virt_enabled(CPURISCVState *env);
 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
-bool riscv_cpu_force_hs_excep_enabled(CPURISCVState *env);
-void riscv_cpu_set_force_hs_excep(CPURISCVState *env, bool enable);
 bool riscv_cpu_two_stage_lookup(int mmu_idx);
 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -XXX,XX +XXX,XX @@ typedef enum {
 
 /* Virtulisation Register Fields */
 #define VIRT_ONOFF          1
-/* This is used to save state for when we take an exception. If this is set
- * that means that we want to force a HS level exception (no matter what the
- * delegation is set to). This will occur for things such as a second level
- * page table fault.
- */
-#define FORCE_HS_EXCEP      2
 
 /* RV32 satp CSR field masks */
 #define SATP32_MODE         0x80000000
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
     env->virt = set_field(env->virt, VIRT_ONOFF, enable);
 }
 
-bool riscv_cpu_force_hs_excep_enabled(CPURISCVState *env)
-{
-    if (!riscv_has_ext(env, RVH)) {
-        return false;
-    }
-
-    return get_field(env->virt, FORCE_HS_EXCEP);
-}
-
-void riscv_cpu_set_force_hs_excep(CPURISCVState *env, bool enable)
-{
-    if (!riscv_has_ext(env, RVH)) {
-        return;
-    }
-
-    env->virt = set_field(env->virt, FORCE_HS_EXCEP, enable);
-}
-
 bool riscv_cpu_two_stage_lookup(int mmu_idx)
 {
     return mmu_idx & TB_FLAGS_PRIV_HYP_ACCESS_MASK;
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
 
     RISCVCPU *cpu = RISCV_CPU(cs);
     CPURISCVState *env = &cpu->env;
-    bool force_hs_execp = riscv_cpu_force_hs_excep_enabled(env);
     uint64_t s;
 
     /* cs->exception is 32-bits wide unlike mcause which is XLEN-bits wide
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
         case RISCV_EXCP_INST_GUEST_PAGE_FAULT:
         case RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT:
         case RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT:
-            force_hs_execp = true;
-            /* fallthrough */
         case RISCV_EXCP_INST_ADDR_MIS:
         case RISCV_EXCP_INST_ACCESS_FAULT:
         case RISCV_EXCP_LOAD_ADDR_MIS:
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
                 env->hstatus = set_field(env->hstatus, HSTATUS_GVA, 0);
             }
 
-            if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1) &&
-                !force_hs_execp) {
+            if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1)) {
                 /* Trap to VS mode */
                 /*
                  * See if we need to adjust cause. Yes if its VS mode interrupt
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
                 htval = env->guest_phys_fault_addr;
 
                 riscv_cpu_set_virt_enabled(env, 0);
-                riscv_cpu_set_force_hs_excep(env, 0);
             } else {
                 /* Trap into HS mode */
                 env->hstatus = set_field(env->hstatus, HSTATUS_SPV, false);
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
 
             /* Trapping to M mode, virt is disabled */
             riscv_cpu_set_virt_enabled(env, 0);
-            riscv_cpu_set_force_hs_excep(env, 0);
         }
 
         s = env->mstatus;
-- 
2.31.1

The following changes since commit ad10b4badc1dd5b28305f9b9f1168cf0aa3ae946:

Merge tag 'pull-error-2024-05-27' of https://repo.or.cz/qemu/armbru into staging (2024-05-27 06:40:42 -0700)

are available in the Git repository at:

https://github.com/alistair23/qemu.git tags/pull-riscv-to-apply-20240528

for you to fetch changes up to 1806da76cb81088ea026ca3441551782b850e393:

target/riscv: raise an exception when CSRRS/CSRRC writes a read-only CSR (2024-05-28 12:20:27 +1000)

----------------------------------------------------------------
RISC-V PR for 9.1

* APLICs add child earlier than realize
* Fix exposure of Zkr
* Raise exceptions on wrs.nto
* Implement SBI debug console (DBCN) calls for KVM
* Support 64-bit addresses for initrd
* Change RISCV_EXCP_SEMIHOST exception number to 63
* Tolerate KVM disable ext errors
* Set tval in breakpoints
* Add support for Zve32x extension
* Add support for Zve64x extension
* Relax vector register check in RISCV gdbstub
* Fix the element agnostic Vector function problem
* Fix Zvkb extension config
* Implement dynamic establishment of custom decoder
* Add th.sxstatus CSR emulation
* Fix Zvfhmin checking for vfwcvt.f.f.v and vfncvt.f.f.w instructions
* Check single width operator for vector fp widen instructions
* Check single width operator for vfncvt.rod.f.f.w
* Remove redudant SEW checking for vector fp narrow/widen instructions
* Prioritize pmp errors in raise_mmu_exception()
* Do not set mtval2 for non guest-page faults
* Remove experimental prefix from "B" extension
* Fixup CBO extension register calculation
* Fix the hart bit setting of AIA
* Fix reg_width in ricsv_gen_dynamic_vector_feature()
* Decode all of the pmpcfg and pmpaddr CSRs
* Raise an exception when CSRRS/CSRRC writes a read-only CSR

----------------------------------------------------------------
Alexei Filippov (1):
      target/riscv: do not set mtval2 for non guest-page faults

Alistair Francis (2):
      target/riscv: rvzicbo: Fixup CBO extension register calculation
      disas/riscv: Decode all of the pmpcfg and pmpaddr CSRs

Andrew Jones (2):
      target/riscv/kvm: Fix exposure of Zkr
      target/riscv: Raise exceptions on wrs.nto

Cheng Yang (1):
      hw/riscv/boot.c: Support 64-bit address for initrd

Christoph Müllner (1):
      riscv: thead: Add th.sxstatus CSR emulation

Clément Léger (1):
      target/riscv: change RISCV_EXCP_SEMIHOST exception number to 63

Daniel Henrique Barboza (6):
      target/riscv/kvm: implement SBI debug console (DBCN) calls
      target/riscv/kvm: tolerate KVM disable ext errors
      target/riscv/debug: set tval=pc in breakpoint exceptions
      trans_privileged.c.inc: set (m|s)tval on ebreak breakpoint
      target/riscv: prioritize pmp errors in raise_mmu_exception()
      riscv, gdbstub.c: fix reg_width in ricsv_gen_dynamic_vector_feature()

Huang Tao (2):
      target/riscv: Fix the element agnostic function problem
      target/riscv: Implement dynamic establishment of custom decoder

Jason Chien (3):
      target/riscv: Add support for Zve32x extension
      target/riscv: Add support for Zve64x extension
      target/riscv: Relax vector register check in RISCV gdbstub

Max Chou (4):
      target/riscv: rvv: Fix Zvfhmin checking for vfwcvt.f.f.v and vfncvt.f.f.w instructions
      target/riscv: rvv: Check single width operator for vector fp widen instructions
      target/riscv: rvv: Check single width operator for vfncvt.rod.f.f.w
      target/riscv: rvv: Remove redudant SEW checking for vector fp narrow/widen instructions

Rob Bradford (1):
      target/riscv: Remove experimental prefix from "B" extension

Yangyu Chen (1):
      target/riscv/cpu.c: fix Zvkb extension config

Yong-Xuan Wang (1):
      target/riscv/kvm.c: Fix the hart bit setting of AIA

Yu-Ming Chang (1):
      target/riscv: raise an exception when CSRRS/CSRRC writes a read-only CSR

yang.zhang (1):
      hw/intc/riscv_aplic: APLICs should add child earlier than realize

From: "yang.zhang" <yang.zhang@hexintek.com>

Since only root APLICs can have hw IRQ lines, aplic->parent should
be initialized first.

Fixes: e8f79343cf ("hw/intc: Add RISC-V AIA APLIC device emulation")
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Signed-off-by: yang.zhang <yang.zhang@hexintek.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240409014445.278-1-gaoshanliukou@163.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 hw/intc/riscv_aplic.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/intc/riscv_aplic.c b/hw/intc/riscv_aplic.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/intc/riscv_aplic.c
+++ b/hw/intc/riscv_aplic.c
@@ -XXX,XX +XXX,XX @@ DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size,
     qdev_prop_set_bit(dev, "msimode", msimode);
     qdev_prop_set_bit(dev, "mmode", mmode);
 
+    if (parent) {
+        riscv_aplic_add_child(parent, dev);
+    }
+
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     if (!is_kvm_aia(msimode)) {
         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
     }
 
-    if (parent) {
-        riscv_aplic_add_child(parent, dev);
-    }
-
     if (!msimode) {
         for (i = 0; i < num_harts; i++) {
             CPUState *cpu = cpu_by_arch_id(hartid_base + i);
-- 
2.45.1

From: Andrew Jones <ajones@ventanamicro.com>

The Zkr extension may only be exposed to KVM guests if the VMM
implements the SEED CSR. Use the same implementation as TCG.

Without this patch, running with a KVM which does not forward the
SEED CSR access to QEMU will result in an ILL exception being
injected into the guest (this results in Linux guests crashing on
boot). And, when running with a KVM which does forward the access,
QEMU will crash, since QEMU doesn't know what to do with the exit.

Fixes: 3108e2f1c69d ("target/riscv/kvm: update KVM exts to Linux 6.8")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240422134605.534207-2-ajones@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h         |  3 +++
 target/riscv/csr.c         | 18 ++++++++++++++----
 target/riscv/kvm/kvm-cpu.c | 25 +++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops);
 
 void riscv_cpu_register_gdb_regs_for_features(CPUState *cs);
 
+target_ulong riscv_new_csr_seed(target_ulong new_value,
+                                target_ulong write_mask);
+
 uint8_t satp_mode_max_from_map(uint32_t map);
 const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
 
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -XXX,XX +XXX,XX @@ static RISCVException write_upmbase(CPURISCVState *env, int csrno,
 #endif
 
 /* Crypto Extension */
-static RISCVException rmw_seed(CPURISCVState *env, int csrno,
-                               target_ulong *ret_value,
-                               target_ulong new_value,
-                               target_ulong write_mask)
+target_ulong riscv_new_csr_seed(target_ulong new_value,
+                                target_ulong write_mask)
 {
     uint16_t random_v;
     Error *random_e = NULL;
@@ -XXX,XX +XXX,XX @@ static RISCVException rmw_seed(CPURISCVState *env, int csrno,
         rval = random_v | SEED_OPST_ES16;
     }
 
+    return rval;
+}
+
+static RISCVException rmw_seed(CPURISCVState *env, int csrno,
+                               target_ulong *ret_value,
+                               target_ulong new_value,
+                               target_ulong write_mask)
+{
+    target_ulong rval;
+
+    rval = riscv_new_csr_seed(new_value, write_mask);
+
     if (ret_value) {
         *ret_value = rval;
     }
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -XXX,XX +XXX,XX @@ static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
     return ret;
 }
 
+static int kvm_riscv_handle_csr(CPUState *cs, struct kvm_run *run)
+{
+    target_ulong csr_num = run->riscv_csr.csr_num;
+    target_ulong new_value = run->riscv_csr.new_value;
+    target_ulong write_mask = run->riscv_csr.write_mask;
+    int ret = 0;
+
+    switch (csr_num) {
+    case CSR_SEED:
+        run->riscv_csr.ret_value = riscv_new_csr_seed(new_value, write_mask);
+        break;
+    default:
+        qemu_log_mask(LOG_UNIMP,
+                      "%s: un-handled CSR EXIT for CSR %lx\n",
+                      __func__, csr_num);
+        ret = -1;
+        break;
+    }
+
+    return ret;
+}
+
 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
 {
     int ret = 0;
@@ -XXX,XX +XXX,XX @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
     case KVM_EXIT_RISCV_SBI:
         ret = kvm_riscv_handle_sbi(cs, run);
         break;
+    case KVM_EXIT_RISCV_CSR:
+        ret = kvm_riscv_handle_csr(cs, run);
+        break;
     default:
         qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
                       __func__, run->exit_reason);
-- 
2.45.1

From: Andrew Jones <ajones@ventanamicro.com>

Implementing wrs.nto to always just return is consistent with the
specification, as the instruction is permitted to terminate the
stall for any reason, but it's not useful for virtualization, where
we'd like the guest to trap to the hypervisor in order to allow
scheduling of the lock holding VCPU. Change to always immediately
raise exceptions when the appropriate conditions are present,
otherwise continue to just return. Note, immediately raising
exceptions is also consistent with the specification since the
time limit that should expire prior to the exception is
implementation-specific.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Christoph Müllner <christoph.muellner@vrull.eu>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240424142808.62936-2-ajones@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/helper.h                       |  1 +
 target/riscv/op_helper.c                    | 11 ++++++++
 target/riscv/insn_trans/trans_rvzawrs.c.inc | 29 ++++++++++++++-------
 3 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -XXX,XX +XXX,XX @@ DEF_HELPER_6(csrrw_i128, tl, env, int, tl, tl, tl, tl)
 DEF_HELPER_1(sret, tl, env)
 DEF_HELPER_1(mret, tl, env)
 DEF_HELPER_1(wfi, void, env)
+DEF_HELPER_1(wrs_nto, void, env)
 DEF_HELPER_1(tlb_flush, void, env)
 DEF_HELPER_1(tlb_flush_all, void, env)
 /* Native Debug */
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -XXX,XX +XXX,XX @@ void helper_wfi(CPURISCVState *env)
     }
 }
 
+void helper_wrs_nto(CPURISCVState *env)
+{
+    if (env->virt_enabled && (env->priv == PRV_S || env->priv == PRV_U) &&
+        get_field(env->hstatus, HSTATUS_VTW) &&
+        !get_field(env->mstatus, MSTATUS_TW)) {
+        riscv_raise_exception(env, RISCV_EXCP_VIRT_INSTRUCTION_FAULT, GETPC());
+    } else if (env->priv != PRV_M && get_field(env->mstatus, MSTATUS_TW)) {
+        riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
+    }
+}
+
 void helper_tlb_flush(CPURISCVState *env)
 {
     CPUState *cs = env_cpu(env);
diff --git a/target/riscv/insn_trans/trans_rvzawrs.c.inc b/target/riscv/insn_trans/trans_rvzawrs.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvzawrs.c.inc
+++ b/target/riscv/insn_trans/trans_rvzawrs.c.inc
@@ -XXX,XX +XXX,XX @@
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-static bool trans_wrs(DisasContext *ctx)
+static bool trans_wrs_sto(DisasContext *ctx, arg_wrs_sto *a)
 {
     if (!ctx->cfg_ptr->ext_zawrs) {
         return false;
@@ -XXX,XX +XXX,XX @@ static bool trans_wrs(DisasContext *ctx)
     return true;
 }
 
-#define GEN_TRANS_WRS(insn)                                     \
-static bool trans_ ## insn(DisasContext *ctx, arg_ ## insn *a)  \
-{                                                               \
-    (void)a;                                                    \
-    return trans_wrs(ctx);                                      \
-}
+static bool trans_wrs_nto(DisasContext *ctx, arg_wrs_nto *a)
+{
+    if (!ctx->cfg_ptr->ext_zawrs) {
+        return false;
+    }
 
-GEN_TRANS_WRS(wrs_nto)
-GEN_TRANS_WRS(wrs_sto)
+    /*
+     * Depending on the mode of execution, mstatus.TW and hstatus.VTW, wrs.nto
+     * should raise an exception when the implementation-specific bounded time
+     * limit has expired. Our time limit is zero, so we either return
+     * immediately, as does our implementation of wrs.sto, or raise an
+     * exception, as handled by the wrs.nto helper.
+     */
+#ifndef CONFIG_USER_ONLY
+    gen_helper_wrs_nto(tcg_env);
+#endif
+
+    /* We only get here when helper_wrs_nto() doesn't raise an exception. */
+    return trans_wrs_sto(ctx, NULL);
+}
-- 
2.45.1

From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

SBI defines a Debug Console extension "DBCN" that will, in time, replace
the legacy console putchar and getchar SBI extensions.

The appeal of the DBCN extension is that it allows multiple bytes to be
read/written in the SBI console in a single SBI call.

As far as KVM goes, the DBCN calls are forwarded by an in-kernel KVM
module to userspace. But this will only happens if the KVM module
actually supports this SBI extension and we activate it.

We'll check for DBCN support during init time, checking if get-reg-list
is advertising KVM_RISCV_SBI_EXT_DBCN. In that case, we'll enable it via
kvm_set_one_reg() during kvm_arch_init_vcpu().

Finally, change kvm_riscv_handle_sbi() to handle the incoming calls for
SBI_EXT_DBCN, reading and writing as required.

A simple KVM guest with 'earlycon=sbi', running in an emulated RISC-V
host, takes around 20 seconds to boot without using DBCN. With this
patch we're taking around 14 seconds to boot due to the speed-up in the
terminal output.  There's no change in boot time if the guest isn't
using earlycon.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Message-ID: <20240425155012.581366-1-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/sbi_ecall_interface.h |  17 +++++
 target/riscv/kvm/kvm-cpu.c         | 111 +++++++++++++++++++++++++++++
 2 files changed, 128 insertions(+)

diff --git a/target/riscv/sbi_ecall_interface.h b/target/riscv/sbi_ecall_interface.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/sbi_ecall_interface.h
+++ b/target/riscv/sbi_ecall_interface.h
@@ -XXX,XX +XXX,XX @@
 
 /* clang-format off */
 
+#define SBI_SUCCESS                      0
+#define SBI_ERR_FAILED                  -1
+#define SBI_ERR_NOT_SUPPORTED           -2
+#define SBI_ERR_INVALID_PARAM           -3
+#define SBI_ERR_DENIED                  -4
+#define SBI_ERR_INVALID_ADDRESS         -5
+#define SBI_ERR_ALREADY_AVAILABLE       -6
+#define SBI_ERR_ALREADY_STARTED         -7
+#define SBI_ERR_ALREADY_STOPPED         -8
+#define SBI_ERR_NO_SHMEM                -9
+
 /* SBI Extension IDs */
 #define SBI_EXT_0_1_SET_TIMER           0x0
 #define SBI_EXT_0_1_CONSOLE_PUTCHAR     0x1
@@ -XXX,XX +XXX,XX @@
 #define SBI_EXT_IPI                     0x735049
 #define SBI_EXT_RFENCE                  0x52464E43
 #define SBI_EXT_HSM                     0x48534D
+#define SBI_EXT_DBCN                    0x4442434E
 
 /* SBI function IDs for BASE extension */
 #define SBI_EXT_BASE_GET_SPEC_VERSION   0x0
@@ -XXX,XX +XXX,XX @@
 #define SBI_EXT_HSM_HART_STOP           0x1
 #define SBI_EXT_HSM_HART_GET_STATUS     0x2
 
+/* SBI function IDs for DBCN extension */
+#define SBI_EXT_DBCN_CONSOLE_WRITE      0x0
+#define SBI_EXT_DBCN_CONSOLE_READ       0x1
+#define SBI_EXT_DBCN_CONSOLE_WRITE_BYTE 0x2
+
 #define SBI_HSM_HART_STATUS_STARTED     0x0
 #define SBI_HSM_HART_STATUS_STOPPED     0x1
 #define SBI_HSM_HART_STATUS_START_PENDING   0x2
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -XXX,XX +XXX,XX @@ static KVMCPUConfig kvm_v_vlenb = {
                    KVM_REG_RISCV_VECTOR_CSR_REG(vlenb)
 };
 
+static KVMCPUConfig kvm_sbi_dbcn = {
+    .name = "sbi_dbcn",
+    .kvm_reg_id = KVM_REG_RISCV | KVM_REG_SIZE_U64 |
+                  KVM_REG_RISCV_SBI_EXT | KVM_RISCV_SBI_EXT_DBCN
+};
+
 static void kvm_riscv_update_cpu_cfg_isa_ext(RISCVCPU *cpu, CPUState *cs)
 {
     CPURISCVState *env = &cpu->env;
@@ -XXX,XX +XXX,XX @@ static int uint64_cmp(const void *a, const void *b)
     return 0;
 }
 
+static void kvm_riscv_check_sbi_dbcn_support(RISCVCPU *cpu,
+                                             KVMScratchCPU *kvmcpu,
+                                             struct kvm_reg_list *reglist)
+{
+    struct kvm_reg_list *reg_search;
+
+    reg_search = bsearch(&kvm_sbi_dbcn.kvm_reg_id, reglist->reg, reglist->n,
+                         sizeof(uint64_t), uint64_cmp);
+
+    if (reg_search) {
+        kvm_sbi_dbcn.supported = true;
+    }
+}
+
 static void kvm_riscv_read_vlenb(RISCVCPU *cpu, KVMScratchCPU *kvmcpu,
                                  struct kvm_reg_list *reglist)
 {
@@ -XXX,XX +XXX,XX @@ static void kvm_riscv_init_multiext_cfg(RISCVCPU *cpu, KVMScratchCPU *kvmcpu)
     if (riscv_has_ext(&cpu->env, RVV)) {
         kvm_riscv_read_vlenb(cpu, kvmcpu, reglist);
     }
+
+    kvm_riscv_check_sbi_dbcn_support(cpu, kvmcpu, reglist);
 }
 
 static void riscv_init_kvm_registers(Object *cpu_obj)
@@ -XXX,XX +XXX,XX @@ static int kvm_vcpu_set_machine_ids(RISCVCPU *cpu, CPUState *cs)
     return ret;
 }
 
+static int kvm_vcpu_enable_sbi_dbcn(RISCVCPU *cpu, CPUState *cs)
+{
+    target_ulong reg = 1;
+
+    if (!kvm_sbi_dbcn.supported) {
+        return 0;
+    }
+
+    return kvm_set_one_reg(cs, kvm_sbi_dbcn.kvm_reg_id, &reg);
+}
+
 int kvm_arch_init_vcpu(CPUState *cs)
 {
     int ret = 0;
@@ -XXX,XX +XXX,XX @@ int kvm_arch_init_vcpu(CPUState *cs)
     kvm_riscv_update_cpu_misa_ext(cpu, cs);
     kvm_riscv_update_cpu_cfg_isa_ext(cpu, cs);
 
+    ret = kvm_vcpu_enable_sbi_dbcn(cpu, cs);
+
     return ret;
 }
 
@@ -XXX,XX +XXX,XX @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs)
     return true;
 }
 
+static void kvm_riscv_handle_sbi_dbcn(CPUState *cs, struct kvm_run *run)
+{
+    g_autofree uint8_t *buf = NULL;
+    RISCVCPU *cpu = RISCV_CPU(cs);
+    target_ulong num_bytes;
+    uint64_t addr;
+    unsigned char ch;
+    int ret;
+
+    switch (run->riscv_sbi.function_id) {
+    case SBI_EXT_DBCN_CONSOLE_READ:
+    case SBI_EXT_DBCN_CONSOLE_WRITE:
+        num_bytes = run->riscv_sbi.args[0];
+
+        if (num_bytes == 0) {
+            run->riscv_sbi.ret[0] = SBI_SUCCESS;
+            run->riscv_sbi.ret[1] = 0;
+            break;
+        }
+
+        addr = run->riscv_sbi.args[1];
+
+        /*
+         * Handle the case where a 32 bit CPU is running in a
+         * 64 bit addressing env.
+         */
+        if (riscv_cpu_mxl(&cpu->env) == MXL_RV32) {
+            addr |= (uint64_t)run->riscv_sbi.args[2] << 32;
+        }
+
+        buf = g_malloc0(num_bytes);
+
+        if (run->riscv_sbi.function_id == SBI_EXT_DBCN_CONSOLE_READ) {
+            ret = qemu_chr_fe_read_all(serial_hd(0)->be, buf, num_bytes);
+            if (ret < 0) {
+                error_report("SBI_EXT_DBCN_CONSOLE_READ: error when "
+                             "reading chardev");
+                exit(1);
+            }
+
+            cpu_physical_memory_write(addr, buf, ret);
+        } else {
+            cpu_physical_memory_read(addr, buf, num_bytes);
+
+            ret = qemu_chr_fe_write_all(serial_hd(0)->be, buf, num_bytes);
+            if (ret < 0) {
+                error_report("SBI_EXT_DBCN_CONSOLE_WRITE: error when "
+                             "writing chardev");
+                exit(1);
+            }
+        }
+
+        run->riscv_sbi.ret[0] = SBI_SUCCESS;
+        run->riscv_sbi.ret[1] = ret;
+        break;
+    case SBI_EXT_DBCN_CONSOLE_WRITE_BYTE:
+        ch = run->riscv_sbi.args[0];
+        ret = qemu_chr_fe_write(serial_hd(0)->be, &ch, sizeof(ch));
+
+        if (ret < 0) {
+            error_report("SBI_EXT_DBCN_CONSOLE_WRITE_BYTE: error when "
+                         "writing chardev");
+            exit(1);
+        }
+
+        run->riscv_sbi.ret[0] = SBI_SUCCESS;
+        run->riscv_sbi.ret[1] = 0;
+        break;
+    default:
+        run->riscv_sbi.ret[0] = SBI_ERR_NOT_SUPPORTED;
+    }
+}
+
 static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
 {
     int ret = 0;
@@ -XXX,XX +XXX,XX @@ static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
         }
         ret = 0;
         break;
+    case SBI_EXT_DBCN:
+        kvm_riscv_handle_sbi_dbcn(cs, run);
+        break;
     default:
         qemu_log_mask(LOG_UNIMP,
                       "%s: un-handled SBI EXIT, specific reasons is %lu\n",
-- 
2.45.1

From: Cheng Yang <yangcheng.work@foxmail.com>

Use qemu_fdt_setprop_u64() instead of qemu_fdt_setprop_cell()
to set the address of initrd in FDT to support 64-bit address.

Signed-off-by: Cheng Yang <yangcheng.work@foxmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <tencent_A4482251DD0890F312758FA6B33F60815609@qq.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 hw/riscv/boot.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -XXX,XX +XXX,XX @@ static void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry)
     /* Some RISC-V machines (e.g. opentitan) don't have a fdt. */
     if (fdt) {
         end = start + size;
-        qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", start);
-        qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", end);
+        qemu_fdt_setprop_u64(fdt, "/chosen", "linux,initrd-start", start);
+        qemu_fdt_setprop_u64(fdt, "/chosen", "linux,initrd-end", end);
     }
 }
 
-- 
2.45.1

From: Clément Léger <cleger@rivosinc.com>

The current semihost exception number (16) is a reserved number (range
[16-17]). The upcoming double trap specification uses that number for
the double trap exception. Since the privileged spec (Table 22) defines
ranges for custom uses change the semihosting exception number to 63
which belongs to the range [48-63] in order to avoid any future
collisions with reserved exception.

Signed-off-by: Clément Léger <cleger@rivosinc.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240422135840.1959967-1-cleger@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_bits.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -XXX,XX +XXX,XX @@ typedef enum RISCVException {
     RISCV_EXCP_INST_PAGE_FAULT = 0xc, /* since: priv-1.10.0 */
     RISCV_EXCP_LOAD_PAGE_FAULT = 0xd, /* since: priv-1.10.0 */
     RISCV_EXCP_STORE_PAGE_FAULT = 0xf, /* since: priv-1.10.0 */
-    RISCV_EXCP_SEMIHOST = 0x10,
     RISCV_EXCP_INST_GUEST_PAGE_FAULT = 0x14,
     RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT = 0x15,
     RISCV_EXCP_VIRT_INSTRUCTION_FAULT = 0x16,
     RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT = 0x17,
+    RISCV_EXCP_SEMIHOST = 0x3f,
 } RISCVException;
 
 #define RISCV_EXCP_INT_FLAG                0x80000000
-- 
2.45.1

From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

Running a KVM guest using a 6.9-rc3 kernel, in a 6.8 host that has zkr
enabled, will fail with a kernel oops SIGILL right at the start. The
reason is that we can't expose zkr without implementing the SEED CSR.
Disabling zkr in the guest would be a workaround, but if the KVM doesn't
allow it we'll error out and never boot.

In hindsight this is too strict. If we keep proceeding, despite not
disabling the extension in the KVM vcpu, we'll not add the extension in
the riscv,isa. The guest kernel will be unaware of the extension, i.e.
it doesn't matter if the KVM vcpu has it enabled underneath or not. So
it's ok to keep booting in this case.

Change our current logic to not error out if we fail to disable an
extension in kvm_set_one_reg(), but show a warning and keep booting. It
is important to throw a warning because we must make the user aware that
the extension is still available in the vcpu, meaning that an
ill-behaved guest can ignore the riscv,isa settings and  use the
extension.

The case we're handling happens with an EINVAL error code. If we fail to
disable the extension in KVM for any other reason, error out.

We'll also keep erroring out when we fail to enable an extension in KVM,
since adding the extension in riscv,isa at this point will cause a guest
malfunction because the extension isn't enabled in the vcpu.

Suggested-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240422171425.333037-2-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/kvm/kvm-cpu.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -XXX,XX +XXX,XX @@ static void kvm_riscv_update_cpu_cfg_isa_ext(RISCVCPU *cpu, CPUState *cs)
         reg = kvm_cpu_cfg_get(cpu, multi_ext_cfg);
         ret = kvm_set_one_reg(cs, id, &reg);
         if (ret != 0) {
-            error_report("Unable to %s extension %s in KVM, error %d",
-                         reg ? "enable" : "disable",
-                         multi_ext_cfg->name, ret);
-            exit(EXIT_FAILURE);
+            if (!reg && ret == -EINVAL) {
+                warn_report("KVM cannot disable extension %s",
+                            multi_ext_cfg->name);
+            } else {
+                error_report("Unable to enable extension %s in KVM, error %d",
+                             multi_ext_cfg->name, ret);
+                exit(EXIT_FAILURE);
+            }
         }
     }
 }
-- 
2.45.1

From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

We're not setting (s/m)tval when triggering breakpoints of type 2
(mcontrol) and 6 (mcontrol6). According to the debug spec section
5.7.12, "Match Control Type 6":

"The Privileged Spec says that breakpoint exceptions that occur on
instruction fetches, loads, or stores update the tval CSR with either
zero or the faulting virtual address. The faulting virtual address for
an mcontrol6 trigger with action = 0 is the address being accessed and
which caused that trigger to fire."

A similar text is also found in the Debug spec section 5.7.11 w.r.t.
mcontrol.

Note that what we're doing ATM is not violating the spec, but it's
simple enough to set mtval/stval and it makes life easier for any
software that relies on this info.

Given that we always use action = 0, save the faulting address for the
mcontrol and mcontrol6 trigger breakpoints into env->badaddr, which is
used as as scratch area for traps with address information. 'tval' is
then set during riscv_cpu_do_interrupt().

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Message-ID: <20240416230437.1869024-2-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_helper.c | 1 +
 target/riscv/debug.c      | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_do_interrupt(CPUState *cs)
             tval = env->bins;
             break;
         case RISCV_EXCP_BREAKPOINT:
+            tval = env->badaddr;
             if (cs->watchpoint_hit) {
                 tval = cs->watchpoint_hit->hitaddr;
                 cs->watchpoint_hit = NULL;
diff --git a/target/riscv/debug.c b/target/riscv/debug.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/debug.c
+++ b/target/riscv/debug.c
@@ -XXX,XX +XXX,XX @@ bool riscv_cpu_debug_check_breakpoint(CPUState *cs)
                 if ((ctrl & TYPE2_EXEC) && (bp->pc == pc)) {
                     /* check U/S/M bit against current privilege level */
                     if ((ctrl >> 3) & BIT(env->priv)) {
+                        env->badaddr = pc;
                         return true;
                     }
                 }
@@ -XXX,XX +XXX,XX @@ bool riscv_cpu_debug_check_breakpoint(CPUState *cs)
                     if (env->virt_enabled) {
                         /* check VU/VS bit against current privilege level */
                         if ((ctrl >> 23) & BIT(env->priv)) {
+                            env->badaddr = pc;
                             return true;
                         }
                     } else {
                         /* check U/S/M bit against current privilege level */
                         if ((ctrl >> 3) & BIT(env->priv)) {
+                            env->badaddr = pc;
                             return true;
                         }
                     }
-- 
2.45.1

From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

Privileged spec section 4.1.9 mentions:

"When a trap is taken into S-mode, stval is written with
exception-specific information to assist software in handling the trap.
(...)

If stval is written with a nonzero value when a breakpoint,
address-misaligned, access-fault, or page-fault exception occurs on an
instruction fetch, load, or store, then stval will contain the faulting
virtual address."

A similar text is found for mtval in section 3.1.16.

Setting mtval/stval in this scenario is optional, but some softwares read
these regs when handling ebreaks.

Write 'badaddr' in all ebreak breakpoints to write the appropriate
'tval' during riscv_do_cpu_interrrupt().

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240416230437.1869024-3-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/insn_trans/trans_privileged.c.inc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/riscv/insn_trans/trans_privileged.c.inc b/target/riscv/insn_trans/trans_privileged.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_privileged.c.inc
+++ b/target/riscv/insn_trans/trans_privileged.c.inc
@@ -XXX,XX +XXX,XX @@ static bool trans_ebreak(DisasContext *ctx, arg_ebreak *a)
     if (pre == 0x01f01013 && ebreak == 0x00100073 && post == 0x40705013) {
         generate_exception(ctx, RISCV_EXCP_SEMIHOST);
     } else {
+        tcg_gen_st_tl(tcg_constant_tl(ebreak_addr), tcg_env,
+                      offsetof(CPURISCVState, badaddr));
         generate_exception(ctx, RISCV_EXCP_BREAKPOINT);
     }
     return true;
-- 
2.45.1

From: Jason Chien <jason.chien@sifive.com>

Add support for Zve32x extension and replace some checks for Zve32f with
Zve32x, since Zve32f depends on Zve32x.

Signed-off-by: Jason Chien <jason.chien@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20240328022343.6871-2-jason.chien@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_cfg.h                  |  1 +
 target/riscv/cpu.c                      |  2 ++
 target/riscv/cpu_helper.c               |  2 +-
 target/riscv/csr.c                      |  2 +-
 target/riscv/tcg/tcg-cpu.c              | 16 ++++++++--------
 target/riscv/insn_trans/trans_rvv.c.inc |  4 ++--
 6 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -XXX,XX +XXX,XX @@ struct RISCVCPUConfig {
     bool ext_zhinx;
     bool ext_zhinxmin;
     bool ext_zve32f;
+    bool ext_zve32x;
     bool ext_zve64f;
     bool ext_zve64d;
     bool ext_zvbb;
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ const RISCVIsaExtData isa_edata_arr[] = {
     ISA_EXT_DATA_ENTRY(zvbb, PRIV_VERSION_1_12_0, ext_zvbb),
     ISA_EXT_DATA_ENTRY(zvbc, PRIV_VERSION_1_12_0, ext_zvbc),
     ISA_EXT_DATA_ENTRY(zve32f, PRIV_VERSION_1_10_0, ext_zve32f),
+    ISA_EXT_DATA_ENTRY(zve32x, PRIV_VERSION_1_10_0, ext_zve32x),
     ISA_EXT_DATA_ENTRY(zve64f, PRIV_VERSION_1_10_0, ext_zve64f),
     ISA_EXT_DATA_ENTRY(zve64d, PRIV_VERSION_1_10_0, ext_zve64d),
     ISA_EXT_DATA_ENTRY(zvfbfmin, PRIV_VERSION_1_12_0, ext_zvfbfmin),
@@ -XXX,XX +XXX,XX @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
     MULTI_EXT_CFG_BOOL("zfh", ext_zfh, false),
     MULTI_EXT_CFG_BOOL("zfhmin", ext_zfhmin, false),
     MULTI_EXT_CFG_BOOL("zve32f", ext_zve32f, false),
+    MULTI_EXT_CFG_BOOL("zve32x", ext_zve32x, false),
     MULTI_EXT_CFG_BOOL("zve64f", ext_zve64f, false),
     MULTI_EXT_CFG_BOOL("zve64d", ext_zve64d, false),
     MULTI_EXT_CFG_BOOL("zvfbfmin", ext_zvfbfmin, false),
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
     *pc = env->xl == MXL_RV32 ? env->pc & UINT32_MAX : env->pc;
     *cs_base = 0;
 
-    if (cpu->cfg.ext_zve32f) {
+    if (cpu->cfg.ext_zve32x) {
         /*
          * If env->vl equals to VLMAX, we can use generic vector operation
          * expanders (GVEC) to accerlate the vector operations.
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -XXX,XX +XXX,XX @@ static RISCVException fs(CPURISCVState *env, int csrno)
 
 static RISCVException vs(CPURISCVState *env, int csrno)
 {
-    if (riscv_cpu_cfg(env)->ext_zve32f) {
+    if (riscv_cpu_cfg(env)->ext_zve32x) {
 #if !defined(CONFIG_USER_ONLY)
         if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
             return RISCV_EXCP_ILLEGAL_INST;
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         return;
     }
 
-    if (cpu->cfg.ext_zve32f && !riscv_has_ext(env, RVF)) {
-        error_setg(errp, "Zve32f/Zve64f extensions require F extension");
-        return;
+    /* The Zve32f extension depends on the Zve32x extension */
+    if (cpu->cfg.ext_zve32f) {
+        if (!riscv_has_ext(env, RVF)) {
+            error_setg(errp, "Zve32f/Zve64f extensions require F extension");
+            return;
+        }
+        cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve32x), true);
     }
 
     if (cpu->cfg.ext_zvfh) {
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zvbc), true);
     }
 
-    /*
-     * In principle Zve*x would also suffice here, were they supported
-     * in qemu
-     */
     if ((cpu->cfg.ext_zvbb || cpu->cfg.ext_zvkb || cpu->cfg.ext_zvkg ||
          cpu->cfg.ext_zvkned || cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksed ||
-         cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32f) {
+         cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32x) {
         error_setg(errp,
                    "Vector crypto extensions require V or Zve* extensions");
         return;
diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -XXX,XX +XXX,XX @@ static bool do_vsetvl(DisasContext *s, int rd, int rs1, TCGv s2)
 {
     TCGv s1, dst;
 
-    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32f) {
+    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32x) {
         return false;
     }
 
@@ -XXX,XX +XXX,XX @@ static bool do_vsetivli(DisasContext *s, int rd, TCGv s1, TCGv s2)
 {
     TCGv dst;
 
-    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32f) {
+    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32x) {
         return false;
     }
 
-- 
2.45.1

From: Jason Chien <jason.chien@sifive.com>

Add support for Zve64x extension. Enabling Zve64f enables Zve64x and
enabling Zve64x enables Zve32x according to their dependency.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2107
Signed-off-by: Jason Chien <jason.chien@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20240328022343.6871-3-jason.chien@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_cfg.h     |  1 +
 target/riscv/cpu.c         |  2 ++
 target/riscv/tcg/tcg-cpu.c | 17 +++++++++++------
 3 files changed, 14 insertions(+), 6 deletions(-)

From: Jason Chien <jason.chien@sifive.com>

In current implementation, the gdbstub allows reading vector registers
only if V extension is supported. However, all vector extensions and
vector crypto extensions have the vector registers and they all depend
on Zve32x. The gdbstub should check for Zve32x instead.

Signed-off-by: Jason Chien <jason.chien@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Max Chou <max.chou@sifive.com>
Message-ID: <20240328022343.6871-4-jason.chien@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/gdbstub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/gdbstub.c
+++ b/target/riscv/gdbstub.c
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_register_gdb_regs_for_features(CPUState *cs)
                                  gdb_find_static_feature("riscv-32bit-fpu.xml"),
                                  0);
     }
-    if (env->misa_ext & RVV) {
+    if (cpu->cfg.ext_zve32x) {
         gdb_register_coprocessor(cs, riscv_gdb_get_vector,
                                  riscv_gdb_set_vector,
                                  ricsv_gen_dynamic_vector_feature(cs, cs->gdb_num_regs),
-- 
2.45.1

From: Huang Tao <eric.huang@linux.alibaba.com>

In RVV and vcrypto instructions, the masked and tail elements are set to 1s
using vext_set_elems_1s function if the vma/vta bit is set. It is the element
agnostic policy.

However, this function can't deal the big endian situation. This patch fixes
the problem by adding handling of such case.

Signed-off-by: Huang Tao <eric.huang@linux.alibaba.com>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240325021654.6594-1-eric.huang@linux.alibaba.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/vector_internals.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/target/riscv/vector_internals.c b/target/riscv/vector_internals.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/vector_internals.c
+++ b/target/riscv/vector_internals.c
@@ -XXX,XX +XXX,XX @@ void vext_set_elems_1s(void *base, uint32_t is_agnostic, uint32_t cnt,
     if (tot - cnt == 0) {
         return ;
     }
+
+    if (HOST_BIG_ENDIAN) {
+        /*
+         * Deal the situation when the elements are insdie
+         * only one uint64 block including setting the
+         * masked-off element.
+         */
+        if (((tot - 1) ^ cnt) < 8) {
+            memset(base + H1(tot - 1), -1, tot - cnt);
+            return;
+        }
+        /*
+         * Otherwise, at least cross two uint64_t blocks.
+         * Set first unaligned block.
+         */
+        if (cnt % 8 != 0) {
+            uint32_t j = ROUND_UP(cnt, 8);
+            memset(base + H1(j - 1), -1, j - cnt);
+            cnt = j;
+        }
+        /* Set other 64bit aligend blocks */
+    }
     memset(base + cnt, -1, tot - cnt);
 }
 
-- 
2.45.1

From: Yangyu Chen <cyy@cyyself.name>

This code has a typo that writes zvkb to zvkg, causing users can't
enable zvkb through the config. This patch gets this fixed.

Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Fixes: ea61ef7097d0 ("target/riscv: Move vector crypto extensions to riscv_cpu_extensions")
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Max Chou <max.chou@sifive.com>
Reviewed-by:  Weiwei Li <liwei1518@gmail.com>
Message-ID: <tencent_7E34EEF0F90B9A68BF38BEE09EC6D4877C0A@qq.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
     /* Vector cryptography extensions */
     MULTI_EXT_CFG_BOOL("zvbb", ext_zvbb, false),
     MULTI_EXT_CFG_BOOL("zvbc", ext_zvbc, false),
-    MULTI_EXT_CFG_BOOL("zvkb", ext_zvkg, false),
+    MULTI_EXT_CFG_BOOL("zvkb", ext_zvkb, false),
     MULTI_EXT_CFG_BOOL("zvkg", ext_zvkg, false),
     MULTI_EXT_CFG_BOOL("zvkned", ext_zvkned, false),
     MULTI_EXT_CFG_BOOL("zvknha", ext_zvknha, false),
-- 
2.45.1

From: Huang Tao <eric.huang@linux.alibaba.com>

In this patch, we modify the decoder to be a freely composable data
structure instead of a hardcoded one. It can be dynamically builded up
according to the extensions.
This approach has several benefits:
1. Provides support for heterogeneous cpu architectures. As we add decoder in
   RISCVCPU, each cpu can have their own decoder, and the decoders can be
   different due to cpu's features.
2. Improve the decoding efficiency. We run the guard_func to see if the decoder
   can be added to the dynamic_decoder when building up the decoder. Therefore,
   there is no need to run the guard_func when decoding each instruction. It can
   improve the decoding efficiency
3. For vendor or dynamic cpus, it allows them to customize their own decoder
   functions to improve decoding efficiency, especially when vendor-defined
   instruction sets increase. Because of dynamic building up, it can skip the other
   decoder guard functions when decoding.
4. Pre patch for allowing adding a vendor decoder before decode_insn32() with minimal
   overhead for users that don't need this particular vendor decoder.

Signed-off-by: Huang Tao <eric.huang@linux.alibaba.com>
Suggested-by: Christoph Muellner <christoph.muellner@vrull.eu>
Co-authored-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240506023607.29544-1-eric.huang@linux.alibaba.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h         |  1 +
 target/riscv/tcg/tcg-cpu.h | 15 +++++++++++++++
 target/riscv/cpu.c         |  1 +
 target/riscv/tcg/tcg-cpu.c | 15 +++++++++++++++
 target/riscv/translate.c   | 31 +++++++++++++++----------------
 5 files changed, 47 insertions(+), 16 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ struct ArchCPU {
     uint32_t pmu_avail_ctrs;
     /* Mapping of events to counters */
     GHashTable *pmu_event_ctr_map;
+    const GPtrArray *decoders;
 };
 
 /**
diff --git a/target/riscv/tcg/tcg-cpu.h b/target/riscv/tcg/tcg-cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/tcg/tcg-cpu.h
+++ b/target/riscv/tcg/tcg-cpu.h
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp);
 void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
 bool riscv_cpu_tcg_compatible(RISCVCPU *cpu);
 
+struct DisasContext;
+struct RISCVCPUConfig;
+typedef struct RISCVDecoder {
+    bool (*guard_func)(const struct RISCVCPUConfig *);
+    bool (*riscv_cpu_decode_fn)(struct DisasContext *, uint32_t);
+} RISCVDecoder;
+
+typedef bool (*riscv_cpu_decode_fn)(struct DisasContext *, uint32_t);
+
+extern const size_t decoder_table_size;
+
+extern const RISCVDecoder decoder_table[];
+
+void riscv_tcg_cpu_finalize_dynamic_decoder(RISCVCPU *cpu);
+
 #endif
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ void riscv_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
             error_propagate(errp, local_err);
             return;
         }
+        riscv_tcg_cpu_finalize_dynamic_decoder(cpu);
     } else if (kvm_enabled()) {
         riscv_kvm_cpu_finalize_features(cpu, &local_err);
         if (local_err != NULL) {
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -XXX,XX +XXX,XX @@ void riscv_tcg_cpu_finalize_features(RISCVCPU *cpu, Error **errp)
     }
 }
 
+void riscv_tcg_cpu_finalize_dynamic_decoder(RISCVCPU *cpu)
+{
+    GPtrArray *dynamic_decoders;
+    dynamic_decoders = g_ptr_array_sized_new(decoder_table_size);
+    for (size_t i = 0; i < decoder_table_size; ++i) {
+        if (decoder_table[i].guard_func &&
+            decoder_table[i].guard_func(&cpu->cfg)) {
+            g_ptr_array_add(dynamic_decoders,
+                            (gpointer)decoder_table[i].riscv_cpu_decode_fn);
+        }
+    }
+
+    cpu->decoders = dynamic_decoders;
+}
+
 bool riscv_cpu_tcg_compatible(RISCVCPU *cpu)
 {
     return object_dynamic_cast(OBJECT(cpu), TYPE_RISCV_CPU_HOST) == NULL;
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -XXX,XX +XXX,XX @@
 #include "exec/helper-info.c.inc"
 #undef  HELPER_H
 
+#include "tcg/tcg-cpu.h"
+
 /* global register indices */
 static TCGv cpu_gpr[32], cpu_gprh[32], cpu_pc, cpu_vl, cpu_vstart;
 static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */
@@ -XXX,XX +XXX,XX @@ typedef struct DisasContext {
     /* FRM is known to contain a valid value. */
     bool frm_valid;
     bool insn_start_updated;
+    const GPtrArray *decoders;
 } DisasContext;
 
 static inline bool has_ext(DisasContext *ctx, uint32_t ext)
@@ -XXX,XX +XXX,XX @@ static inline int insn_len(uint16_t first_word)
     return (first_word & 3) == 3 ? 4 : 2;
 }
 
+const RISCVDecoder decoder_table[] = {
+    { always_true_p, decode_insn32 },
+    { has_xthead_p, decode_xthead},
+    { has_XVentanaCondOps_p, decode_XVentanaCodeOps},
+};
+
+const size_t decoder_table_size = ARRAY_SIZE(decoder_table);
+
 static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode)
 {
-    /*
-     * A table with predicate (i.e., guard) functions and decoder functions
-     * that are tested in-order until a decoder matches onto the opcode.
-     */
-    static const struct {
-        bool (*guard_func)(const RISCVCPUConfig *);
-        bool (*decode_func)(DisasContext *, uint32_t);
-    } decoders[] = {
-        { always_true_p,  decode_insn32 },
-        { has_xthead_p, decode_xthead },
-        { has_XVentanaCondOps_p,  decode_XVentanaCodeOps },
-    };
-
     ctx->virt_inst_excp = false;
     ctx->cur_insn_len = insn_len(opcode);
     /* Check for compressed insn */
@@ -XXX,XX +XXX,XX @@ static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode)
                                              ctx->base.pc_next + 2));
         ctx->opcode = opcode32;
 
-        for (size_t i = 0; i < ARRAY_SIZE(decoders); ++i) {
-            if (decoders[i].guard_func(ctx->cfg_ptr) &&
-                decoders[i].decode_func(ctx, opcode32)) {
+        for (guint i = 0; i < ctx->decoders->len; ++i) {
+            riscv_cpu_decode_fn func = g_ptr_array_index(ctx->decoders, i);
+            if (func(ctx, opcode32)) {
                 return;
             }
         }
@@ -XXX,XX +XXX,XX @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     ctx->itrigger = FIELD_EX32(tb_flags, TB_FLAGS, ITRIGGER);
     ctx->zero = tcg_constant_tl(0);
     ctx->virt_inst_excp = false;
+    ctx->decoders = cpu->decoders;
 }
 
 static void riscv_tr_tb_start(DisasContextBase *db, CPUState *cpu)
-- 
2.45.1

From: Christoph Müllner <christoph.muellner@vrull.eu>

The th.sxstatus CSR can be used to identify available custom extension
on T-Head CPUs. The CSR is documented here:
  https://github.com/T-head-Semi/thead-extension-spec/blob/master/xtheadsxstatus.adoc

An important property of this patch is, that the th.sxstatus MAEE field
is not set (indicating that XTheadMae is not available).
XTheadMae is a memory attribute extension (similar to Svpbmt) which is
implemented in many T-Head CPUs (C906, C910, etc.) and utilizes bits
in PTEs that are marked as reserved. QEMU maintainers prefer to not
implement XTheadMae, so we need give kernels a mechanism to identify
if XTheadMae is available in a system or not. And this patch introduces
this mechanism in QEMU in a way that's compatible with real HW
(i.e., probing the th.sxstatus.MAEE bit).

Further context can be found on the list:
https://lists.gnu.org/archive/html/qemu-devel/2024-02/msg00775.html

Reviewed-by: LIU Zhiwei <zhiwe_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
Message-ID: <20240429073656.2486732-1-christoph.muellner@vrull.eu>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 MAINTAINERS              |  1 +
 target/riscv/cpu.h       |  3 ++
 target/riscv/cpu.c       |  1 +
 target/riscv/th_csr.c    | 79 ++++++++++++++++++++++++++++++++++++++++
 target/riscv/meson.build |  1 +
 5 files changed, 85 insertions(+)
 create mode 100644 target/riscv/th_csr.c

diff --git a/MAINTAINERS b/MAINTAINERS
index XXXXXXX..XXXXXXX 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -XXX,XX +XXX,XX @@ L: qemu-riscv@nongnu.org
 S: Supported
 F: target/riscv/insn_trans/trans_xthead.c.inc
 F: target/riscv/xthead*.decode
+F: target/riscv/th_*
 F: disas/riscv-xthead*
 
 RISC-V XVentanaCondOps extension
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ target_ulong riscv_new_csr_seed(target_ulong new_value,
 uint8_t satp_mode_max_from_map(uint32_t map);
 const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
 
+/* Implemented in th_csr.c */
+void th_register_custom_csrs(RISCVCPU *cpu);
+
 #endif /* RISCV_CPU_H */
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ static void rv64_thead_c906_cpu_init(Object *obj)
     cpu->cfg.mvendorid = THEAD_VENDOR_ID;
 #ifndef CONFIG_USER_ONLY
     set_satp_mode_max_supported(cpu, VM_1_10_SV39);
+    th_register_custom_csrs(cpu);
 #endif
 
     /* inherited from parent obj via riscv_cpu_init() */
diff --git a/target/riscv/th_csr.c b/target/riscv/th_csr.c
new file mode 100644
index XXXXXXX..XXXXXXX
--- /dev/null
+++ b/target/riscv/th_csr.c
@@ -XXX,XX +XXX,XX @@
+/*
+ * T-Head-specific CSRs.
+ *
+ * Copyright (c) 2024 VRULL GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "cpu_vendorid.h"
+
+#define CSR_TH_SXSTATUS 0x5c0
+
+/* TH_SXSTATUS bits */
+#define TH_SXSTATUS_UCME        BIT(16)
+#define TH_SXSTATUS_MAEE        BIT(21)
+#define TH_SXSTATUS_THEADISAEE  BIT(22)
+
+typedef struct {
+    int csrno;
+    int (*insertion_test)(RISCVCPU *cpu);
+    riscv_csr_operations csr_ops;
+} riscv_csr;
+
+static RISCVException smode(CPURISCVState *env, int csrno)
+{
+    if (riscv_has_ext(env, RVS)) {
+        return RISCV_EXCP_NONE;
+    }
+
+    return RISCV_EXCP_ILLEGAL_INST;
+}
+
+static int test_thead_mvendorid(RISCVCPU *cpu)
+{
+    if (cpu->cfg.mvendorid != THEAD_VENDOR_ID) {
+        return -1;
+    }
+
+    return 0;
+}
+
+static RISCVException read_th_sxstatus(CPURISCVState *env, int csrno,
+                                       target_ulong *val)
+{
+    /* We don't set MAEE here, because QEMU does not implement MAEE. */
+    *val = TH_SXSTATUS_UCME | TH_SXSTATUS_THEADISAEE;
+    return RISCV_EXCP_NONE;
+}
+
+static riscv_csr th_csr_list[] = {
+    {
+        .csrno = CSR_TH_SXSTATUS,
+        .insertion_test = test_thead_mvendorid,
+        .csr_ops = { "th.sxstatus", smode, read_th_sxstatus }
+    }
+};
+
+void th_register_custom_csrs(RISCVCPU *cpu)
+{
+    for (size_t i = 0; i < ARRAY_SIZE(th_csr_list); i++) {
+        int csrno = th_csr_list[i].csrno;
+        riscv_csr_operations *csr_ops = &th_csr_list[i].csr_ops;
+        if (!th_csr_list[i].insertion_test(cpu)) {
+            riscv_set_csr_ops(csrno, csr_ops);
+        }
+    }
+}
diff --git a/target/riscv/meson.build b/target/riscv/meson.build
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -XXX,XX +XXX,XX @@ riscv_system_ss.add(files(
   'monitor.c',
   'machine.c',
   'pmu.c',
+  'th_csr.c',
   'time_helper.c',
   'riscv-qmp-cmds.c',
 ))
-- 
2.45.1

From: Max Chou <max.chou@sifive.com>

According v spec 18.4, only the vfwcvt.f.f.v and vfncvt.f.f.w
instructions will be affected by Zvfhmin extension.
And the vfwcvt.f.f.v and vfncvt.f.f.w instructions only support the
conversions of

* From 1*SEW(16/32) to 2*SEW(32/64)
* From 2*SEW(32/64) to 1*SEW(16/32)

Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240322092600.1198921-2-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/insn_trans/trans_rvv.c.inc | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

From: Max Chou <max.chou@sifive.com>

The require_scale_rvf function only checks the double width operator for
the vector floating point widen instructions, so most of the widen
checking functions need to add require_rvf for single width operator.

The vfwcvt.f.x.v and vfwcvt.f.xu.v instructions convert single width
integer to double width float, so the opfxv_widen_check function doesn’t
need require_rvf for the single width operator(integer).

Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240322092600.1198921-3-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/insn_trans/trans_rvv.c.inc | 5 +++++
 1 file changed, 5 insertions(+)

From: Max Chou <max.chou@sifive.com>

If the checking functions check both the single and double width
operators at the same time, then the single width operator checking
functions (require_rvf[min]) will check whether the SEW is 8.

Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240322092600.1198921-5-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/insn_trans/trans_rvv.c.inc | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -XXX,XX +XXX,XX @@ static bool opfvv_widen_check(DisasContext *s, arg_rmrr *a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_dss(s, a->rd, a->rs1, a->rs2, a->vm);
 }
@@ -XXX,XX +XXX,XX @@ static bool opfvf_widen_check(DisasContext *s, arg_rmrr *a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_ds(s, a->rd, a->rs2, a->vm);
 }
@@ -XXX,XX +XXX,XX @@ static bool opfwv_widen_check(DisasContext *s, arg_rmrr *a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_dds(s, a->rd, a->rs1, a->rs2, a->vm);
 }
@@ -XXX,XX +XXX,XX @@ static bool opfwf_widen_check(DisasContext *s, arg_rmrr *a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_dd(s, a->rd, a->rs2, a->vm);
 }
@@ -XXX,XX +XXX,XX @@ static bool opffv_widen_check(DisasContext *s, arg_rmr *a)
 {
     return opfv_widen_check(s, a) &&
            require_rvfmin(s) &&
-           require_scale_rvfmin(s) &&
-           (s->sew != MO_8);
+           require_scale_rvfmin(s);
 }
 
 #define GEN_OPFV_WIDEN_TRANS(NAME, CHECK, HELPER, FRM)             \
@@ -XXX,XX +XXX,XX @@ static bool opffv_narrow_check(DisasContext *s, arg_rmr *a)
 {
     return opfv_narrow_check(s, a) &&
            require_rvfmin(s) &&
-           require_scale_rvfmin(s) &&
-           (s->sew != MO_8);
+           require_scale_rvfmin(s);
 }
 
 static bool opffv_rod_narrow_check(DisasContext *s, arg_rmr *a)
 {
     return opfv_narrow_check(s, a) &&
            require_rvf(s) &&
-           require_scale_rvf(s) &&
-           (s->sew != MO_8);
+           require_scale_rvf(s);
 }
 
 #define GEN_OPFV_NARROW_TRANS(NAME, CHECK, HELPER, FRM)            \
@@ -XXX,XX +XXX,XX @@ static bool freduction_widen_check(DisasContext *s, arg_rmrr *a)
 {
     return reduction_widen_check(s, a) &&
            require_rvf(s) &&
-           require_scale_rvf(s) &&
-           (s->sew != MO_8);
+           require_scale_rvf(s);
 }
 
 GEN_OPFVV_WIDEN_TRANS(vfwredusum_vs, freduction_widen_check)
-- 
2.45.1

From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

raise_mmu_exception(), as is today, is prioritizing guest page faults by
checking first if virt_enabled && !first_stage, and then considering the
regular inst/load/store faults.

There's no mention in the spec about guest page fault being a higher
priority that PMP faults. In fact, privileged spec section 3.7.1 says:

"Attempting to fetch an instruction from a PMP region that does not have
execute permissions raises an instruction access-fault exception.
Attempting to execute a load or load-reserved instruction which accesses
a physical address within a PMP region without read permissions raises a
load access-fault exception. Attempting to execute a store,
store-conditional, or AMO instruction which accesses a physical address
within a PMP region without write permissions raises a store
access-fault exception."

So, in fact, we're doing it wrong - PMP faults should always be thrown,
regardless of also being a first or second stage fault.

The way riscv_cpu_tlb_fill() and get_physical_address() work is
adequate: a TRANSLATE_PMP_FAIL error is immediately reported and
reflected in the 'pmp_violation' flag. What we need is to change
raise_mmu_exception() to prioritize it.

Reported-by: Joseph Chan <jchan@ventanamicro.com>
Fixes: 82d53adfbb ("target/riscv/cpu_helper.c: Invalid exception on MMU translation stage")
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240413105929.7030-1-alexei.filippov@syntacore.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_helper.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ static void raise_mmu_exception(CPURISCVState *env, target_ulong address,
 
     switch (access_type) {
     case MMU_INST_FETCH:
-        if (env->virt_enabled && !first_stage) {
+        if (pmp_violation) {
+            cs->exception_index = RISCV_EXCP_INST_ACCESS_FAULT;
+        } else if (env->virt_enabled && !first_stage) {
             cs->exception_index = RISCV_EXCP_INST_GUEST_PAGE_FAULT;
         } else {
-            cs->exception_index = pmp_violation ?
-                RISCV_EXCP_INST_ACCESS_FAULT : RISCV_EXCP_INST_PAGE_FAULT;
+            cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT;
         }
         break;
     case MMU_DATA_LOAD:
-        if (two_stage && !first_stage) {
+        if (pmp_violation) {
+            cs->exception_index = RISCV_EXCP_LOAD_ACCESS_FAULT;
+        } else if (two_stage && !first_stage) {
             cs->exception_index = RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT;
         } else {
-            cs->exception_index = pmp_violation ?
-                RISCV_EXCP_LOAD_ACCESS_FAULT : RISCV_EXCP_LOAD_PAGE_FAULT;
+            cs->exception_index = RISCV_EXCP_LOAD_PAGE_FAULT;
         }
         break;
     case MMU_DATA_STORE:
-        if (two_stage && !first_stage) {
+        if (pmp_violation) {
+            cs->exception_index = RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
+        } else if (two_stage && !first_stage) {
             cs->exception_index = RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT;
         } else {
-            cs->exception_index = pmp_violation ?
-                RISCV_EXCP_STORE_AMO_ACCESS_FAULT :
-                RISCV_EXCP_STORE_PAGE_FAULT;
+            cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT;
         }
         break;
     default:
-- 
2.45.1

From: Alexei Filippov <alexei.filippov@syntacore.com>

Previous patch fixed the PMP priority in raise_mmu_exception() but we're still
setting mtval2 incorrectly. In riscv_cpu_tlb_fill(), after pmp check in 2 stage
translation part, mtval2 will be set in case of successes 2 stage translation but
failed pmp check.

In this case we gonna set mtval2 via env->guest_phys_fault_addr in context of
riscv_cpu_tlb_fill(), as this was a guest-page-fault, but it didn't and mtval2
should be zero, according to RISCV privileged spec sect. 9.4.4: When a guest
page-fault is taken into M-mode, mtval2 is written with either zero or guest
physical address that faulted, shifted by 2 bits. *For other traps, mtval2
is set to zero...*

Signed-off-by: Alexei Filippov <alexei.filippov@syntacore.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240503103052.6819-1-alexei.filippov@syntacore.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_helper.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -XXX,XX +XXX,XX @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                               __func__, pa, ret, prot_pmp, tlb_size);
 
                 prot &= prot_pmp;
-            }
-
-            if (ret != TRANSLATE_SUCCESS) {
+            } else {
                 /*
                  * Guest physical address translation failed, this is a HS
                  * level exception
                  */
                 first_stage_error = false;
-                env->guest_phys_fault_addr = (im_address |
-                                              (address &
-                                               (TARGET_PAGE_SIZE - 1))) >> 2;
+                if (ret != TRANSLATE_PMP_FAIL) {
+                    env->guest_phys_fault_addr = (im_address |
+                                                  (address &
+                                                   (TARGET_PAGE_SIZE - 1))) >> 2;
+                }
             }
         }
     } else {
-- 
2.45.1

From: Rob Bradford <rbradford@rivosinc.com>

This extension has now been ratified:
https://jira.riscv.org/browse/RVS-2006 so the "x-" prefix can be
removed.

Since this is now a ratified extension add it to the list of extensions
included in the "max" CPU variant.

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Message-ID: <20240514110217.22516-1-rbradford@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.c         | 2 +-
 target/riscv/tcg/tcg-cpu.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -XXX,XX +XXX,XX @@ static const MISAExtInfo misa_ext_info_arr[] = {
     MISA_EXT_INFO(RVJ, "x-j", "Dynamic translated languages"),
     MISA_EXT_INFO(RVV, "v", "Vector operations"),
     MISA_EXT_INFO(RVG, "g", "General purpose (IMAFD_Zicsr_Zifencei)"),
-    MISA_EXT_INFO(RVB, "x-b", "Bit manipulation (Zba_Zbb_Zbs)")
+    MISA_EXT_INFO(RVB, "b", "Bit manipulation (Zba_Zbb_Zbs)")
 };
 
 static void riscv_cpu_validate_misa_mxl(RISCVCPUClass *mcc)
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -XXX,XX +XXX,XX @@ static void riscv_init_max_cpu_extensions(Object *obj)
     const RISCVCPUMultiExtConfig *prop;
 
     /* Enable RVG, RVJ and RVV that are disabled by default */
-    riscv_cpu_set_misa_ext(env, env->misa_ext | RVG | RVJ | RVV);
+    riscv_cpu_set_misa_ext(env, env->misa_ext | RVB | RVG | RVJ | RVV);
 
     for (prop = riscv_cpu_extensions; prop && prop->name; prop++) {
         isa_ext_update_enabled(cpu, prop->offset, true);
-- 
2.45.1

From: Alistair Francis <alistair23@gmail.com>

When running the instruction

```
    cbo.flush 0(x0)
```

QEMU would segfault.

The issue was in cpu_gpr[a->rs1] as QEMU does not have cpu_gpr[0]
allocated.

In order to fix this let's use the existing get_address()
helper. This also has the benefit of performing pointer mask
calculations on the address specified in rs1.

The pointer masking specificiation specifically states:

"""
Cache Management Operations: All instructions in Zicbom, Zicbop and Zicboz
"""

So this is the correct behaviour and we previously have been incorrectly
not masking the address.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reported-by: Fabian Thomas <fabian.thomas@cispa.de>
Fixes: e05da09b7cfd ("target/riscv: implement Zicbom extension")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240514023910.301766-1-alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/insn_trans/trans_rvzicbo.c.inc | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/target/riscv/insn_trans/trans_rvzicbo.c.inc b/target/riscv/insn_trans/trans_rvzicbo.c.inc
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/insn_trans/trans_rvzicbo.c.inc
+++ b/target/riscv/insn_trans/trans_rvzicbo.c.inc
@@ -XXX,XX +XXX,XX @@
 static bool trans_cbo_clean(DisasContext *ctx, arg_cbo_clean *a)
 {
     REQUIRE_ZICBOM(ctx);
-    gen_helper_cbo_clean_flush(tcg_env, cpu_gpr[a->rs1]);
+    TCGv src = get_address(ctx, a->rs1, 0);
+
+    gen_helper_cbo_clean_flush(tcg_env, src);
     return true;
 }
 
 static bool trans_cbo_flush(DisasContext *ctx, arg_cbo_flush *a)
 {
     REQUIRE_ZICBOM(ctx);
-    gen_helper_cbo_clean_flush(tcg_env, cpu_gpr[a->rs1]);
+    TCGv src = get_address(ctx, a->rs1, 0);
+
+    gen_helper_cbo_clean_flush(tcg_env, src);
     return true;
 }
 
 static bool trans_cbo_inval(DisasContext *ctx, arg_cbo_inval *a)
 {
     REQUIRE_ZICBOM(ctx);
-    gen_helper_cbo_inval(tcg_env, cpu_gpr[a->rs1]);
+    TCGv src = get_address(ctx, a->rs1, 0);
+
+    gen_helper_cbo_inval(tcg_env, src);
     return true;
 }
 
 static bool trans_cbo_zero(DisasContext *ctx, arg_cbo_zero *a)
 {
     REQUIRE_ZICBOZ(ctx);
-    gen_helper_cbo_zero(tcg_env, cpu_gpr[a->rs1]);
+    TCGv src = get_address(ctx, a->rs1, 0);
+
+    gen_helper_cbo_zero(tcg_env, src);
     return true;
 }
-- 
2.45.1

From: Yong-Xuan Wang <yongxuan.wang@sifive.com>

In AIA spec, each hart (or each hart within a group) has a unique hart
number to locate the memory pages of interrupt files in the address
space. The number of bits required to represent any hart number is equal
to ceil(log2(hmax + 1)), where hmax is the largest hart number among
groups.

However, if the largest hart number among groups is a power of 2, QEMU
will pass an inaccurate hart-index-bit setting to Linux. For example, when
the guest OS has 4 harts, only ceil(log2(3 + 1)) = 2 bits are sufficient
to represent 4 harts, but we passes 3 to Linux. The code needs to be
updated to ensure accurate hart-index-bit settings.

Additionally, a Linux patch[1] is necessary to correctly recover the hart
index when the guest OS has only 1 hart, where the hart-index-bit is 0.

[1] https://lore.kernel.org/lkml/20240415064905.25184-1-yongxuan.wang@sifive.com/t/

Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240515091129.28116-1-yongxuan.wang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/kvm/kvm-cpu.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -XXX,XX +XXX,XX @@ void kvm_riscv_aia_create(MachineState *machine, uint64_t group_shift,
         }
     }
 
-    hart_bits = find_last_bit(&max_hart_per_socket, BITS_PER_LONG) + 1;
+
+    if (max_hart_per_socket > 1) {
+        max_hart_per_socket--;
+        hart_bits = find_last_bit(&max_hart_per_socket, BITS_PER_LONG) + 1;
+    } else {
+        hart_bits = 0;
+    }
+
     ret = kvm_device_access(aia_fd, KVM_DEV_RISCV_AIA_GRP_CONFIG,
                             KVM_DEV_RISCV_AIA_CONFIG_HART_BITS,
                             &hart_bits, true, NULL);
-- 
2.45.1

From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

Commit 33a24910ae changed 'reg_width' to use 'vlenb', i.e. vector length
in bytes, when in this context we want 'reg_width' as the length in
bits.

Fix 'reg_width' back to the value in bits like 7cb59921c05a
("target/riscv/gdbstub.c: use 'vlenb' instead of shifting 'vlen'") set
beforehand.

While we're at it, rename 'reg_width' to 'bitsize' to provide a bit more
clarity about what the variable represents. 'bitsize' is also used in
riscv_gen_dynamic_csr_feature() with the same purpose, i.e. as an input to
gdb_feature_builder_append_reg().

Cc: Akihiko Odaki <akihiko.odaki@daynix.com>
Cc: Alex Bennée <alex.bennee@linaro.org>
Reported-by: Robin Dapp <rdapp.gcc@gmail.com>
Fixes: 33a24910ae ("target/riscv: Use GDBFeature for dynamic XML")
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240517203054.880861-2-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/gdbstub.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/gdbstub.c
+++ b/target/riscv/gdbstub.c
@@ -XXX,XX +XXX,XX @@ static GDBFeature *riscv_gen_dynamic_csr_feature(CPUState *cs, int base_reg)
 static GDBFeature *ricsv_gen_dynamic_vector_feature(CPUState *cs, int base_reg)
 {
     RISCVCPU *cpu = RISCV_CPU(cs);
-    int reg_width = cpu->cfg.vlenb;
+    int bitsize = cpu->cfg.vlenb << 3;
     GDBFeatureBuilder builder;
     int i;
 
@@ -XXX,XX +XXX,XX @@ static GDBFeature *ricsv_gen_dynamic_vector_feature(CPUState *cs, int base_reg)
 
     /* First define types and totals in a whole VL */
     for (i = 0; i < ARRAY_SIZE(vec_lanes); i++) {
-        int count = reg_width / vec_lanes[i].size;
+        int count = bitsize / vec_lanes[i].size;
         gdb_feature_builder_append_tag(
             &builder, "<vector id=\"%s\" type=\"%s\" count=\"%d\"/>",
             vec_lanes[i].id, vec_lanes[i].gdb_type, count);
@@ -XXX,XX +XXX,XX @@ static GDBFeature *ricsv_gen_dynamic_vector_feature(CPUState *cs, int base_reg)
     /* Define vector registers */
     for (i = 0; i < 32; i++) {
         gdb_feature_builder_append_reg(&builder, g_strdup_printf("v%d", i),
-                                       reg_width, i, "riscv_vector", "vector");
+                                       bitsize, i, "riscv_vector", "vector");
     }
 
     gdb_feature_builder_end(&builder);
-- 
2.45.1

From: Alistair Francis <alistair23@gmail.com>

Previously we only listed a single pmpcfg CSR and the first 16 pmpaddr
CSRs. This patch fixes this to list all 16 pmpcfg and all 64 pmpaddr
CSRs are part of the disassembly.

Reported-by: Eric DeVolder <eric_devolder@yahoo.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Fixes: ea10325917 ("RISC-V Disassembler")
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240514051615.330979-1-alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 disas/riscv.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 64 insertions(+), 1 deletion(-)

diff --git a/disas/riscv.c b/disas/riscv.c
index XXXXXXX..XXXXXXX 100644
--- a/disas/riscv.c
+++ b/disas/riscv.c
@@ -XXX,XX +XXX,XX @@ static const char *csr_name(int csrno)
     case 0x0383: return "mibound";
     case 0x0384: return "mdbase";
     case 0x0385: return "mdbound";
-    case 0x03a0: return "pmpcfg3";
+    case 0x03a0: return "pmpcfg0";
+    case 0x03a1: return "pmpcfg1";
+    case 0x03a2: return "pmpcfg2";
+    case 0x03a3: return "pmpcfg3";
+    case 0x03a4: return "pmpcfg4";
+    case 0x03a5: return "pmpcfg5";
+    case 0x03a6: return "pmpcfg6";
+    case 0x03a7: return "pmpcfg7";
+    case 0x03a8: return "pmpcfg8";
+    case 0x03a9: return "pmpcfg9";
+    case 0x03aa: return "pmpcfg10";
+    case 0x03ab: return "pmpcfg11";
+    case 0x03ac: return "pmpcfg12";
+    case 0x03ad: return "pmpcfg13";
+    case 0x03ae: return "pmpcfg14";
+    case 0x03af: return "pmpcfg15";
     case 0x03b0: return "pmpaddr0";
     case 0x03b1: return "pmpaddr1";
     case 0x03b2: return "pmpaddr2";
@@ -XXX,XX +XXX,XX @@ static const char *csr_name(int csrno)
     case 0x03bd: return "pmpaddr13";
     case 0x03be: return "pmpaddr14";
     case 0x03bf: return "pmpaddr15";
+    case 0x03c0: return "pmpaddr16";
+    case 0x03c1: return "pmpaddr17";
+    case 0x03c2: return "pmpaddr18";
+    case 0x03c3: return "pmpaddr19";
+    case 0x03c4: return "pmpaddr20";
+    case 0x03c5: return "pmpaddr21";
+    case 0x03c6: return "pmpaddr22";
+    case 0x03c7: return "pmpaddr23";
+    case 0x03c8: return "pmpaddr24";
+    case 0x03c9: return "pmpaddr25";
+    case 0x03ca: return "pmpaddr26";
+    case 0x03cb: return "pmpaddr27";
+    case 0x03cc: return "pmpaddr28";
+    case 0x03cd: return "pmpaddr29";
+    case 0x03ce: return "pmpaddr30";
+    case 0x03cf: return "pmpaddr31";
+    case 0x03d0: return "pmpaddr32";
+    case 0x03d1: return "pmpaddr33";
+    case 0x03d2: return "pmpaddr34";
+    case 0x03d3: return "pmpaddr35";
+    case 0x03d4: return "pmpaddr36";
+    case 0x03d5: return "pmpaddr37";
+    case 0x03d6: return "pmpaddr38";
+    case 0x03d7: return "pmpaddr39";
+    case 0x03d8: return "pmpaddr40";
+    case 0x03d9: return "pmpaddr41";
+    case 0x03da: return "pmpaddr42";
+    case 0x03db: return "pmpaddr43";
+    case 0x03dc: return "pmpaddr44";
+    case 0x03dd: return "pmpaddr45";
+    case 0x03de: return "pmpaddr46";
+    case 0x03df: return "pmpaddr47";
+    case 0x03e0: return "pmpaddr48";
+    case 0x03e1: return "pmpaddr49";
+    case 0x03e2: return "pmpaddr50";
+    case 0x03e3: return "pmpaddr51";
+    case 0x03e4: return "pmpaddr52";
+    case 0x03e5: return "pmpaddr53";
+    case 0x03e6: return "pmpaddr54";
+    case 0x03e7: return "pmpaddr55";
+    case 0x03e8: return "pmpaddr56";
+    case 0x03e9: return "pmpaddr57";
+    case 0x03ea: return "pmpaddr58";
+    case 0x03eb: return "pmpaddr59";
+    case 0x03ec: return "pmpaddr60";
+    case 0x03ed: return "pmpaddr61";
+    case 0x03ee: return "pmpaddr62";
+    case 0x03ef: return "pmpaddr63";
     case 0x0780: return "mtohost";
     case 0x0781: return "mfromhost";
     case 0x0782: return "mreset";
-- 
2.45.1

From: Yu-Ming Chang <yumin686@andestech.com>

Both CSRRS and CSRRC always read the addressed CSR and cause any read side
effects regardless of rs1 and rd fields. Note that if rs1 specifies a register
holding a zero value other than x0, the instruction will still attempt to write
the unmodified value back to the CSR and will cause any attendant side effects.

So if CSRRS or CSRRC tries to write a read-only CSR with rs1 which specifies
a register holding a zero value, an illegal instruction exception should be
raised.

Signed-off-by: Yu-Ming Chang <yumin686@andestech.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240403070823.80897-1-yumin686@andestech.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h       |  4 ++++
 target/riscv/csr.c       | 51 ++++++++++++++++++++++++++++++++++++----
 target/riscv/op_helper.c |  6 ++---
 3 files changed, 53 insertions(+), 8 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -XXX,XX +XXX,XX @@ void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
 void riscv_cpu_update_mask(CPURISCVState *env);
 bool riscv_cpu_is_32bit(RISCVCPU *cpu);
 
+RISCVException riscv_csrr(CPURISCVState *env, int csrno,
+                          target_ulong *ret_value);
 RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
                            target_ulong *ret_value,
                            target_ulong new_value, target_ulong write_mask);
@@ -XXX,XX +XXX,XX @@ typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno,
                                           target_ulong new_value,
                                           target_ulong write_mask);
 
+RISCVException riscv_csrr_i128(CPURISCVState *env, int csrno,
+                               Int128 *ret_value);
 RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno,
                                 Int128 *ret_value,
                                 Int128 new_value, Int128 write_mask);
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -XXX,XX +XXX,XX @@ static RISCVException rmw_seed(CPURISCVState *env, int csrno,
 
 static inline RISCVException riscv_csrrw_check(CPURISCVState *env,
                                                int csrno,
-                                               bool write_mask)
+                                               bool write)
 {
     /* check privileges and return RISCV_EXCP_ILLEGAL_INST if check fails */
     bool read_only = get_field(csrno, 0xC00) == 3;
@@ -XXX,XX +XXX,XX @@ static inline RISCVException riscv_csrrw_check(CPURISCVState *env,
     }
 
     /* read / write check */
-    if (write_mask && read_only) {
+    if (write && read_only) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
@@ -XXX,XX +XXX,XX @@ static RISCVException riscv_csrrw_do64(CPURISCVState *env, int csrno,
     return RISCV_EXCP_NONE;
 }
 
+RISCVException riscv_csrr(CPURISCVState *env, int csrno,
+                           target_ulong *ret_value)
+{
+    RISCVException ret = riscv_csrrw_check(env, csrno, false);
+    if (ret != RISCV_EXCP_NONE) {
+        return ret;
+    }
+
+    return riscv_csrrw_do64(env, csrno, ret_value, 0, 0);
+}
+
 RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
                            target_ulong *ret_value,
                            target_ulong new_value, target_ulong write_mask)
 {
-    RISCVException ret = riscv_csrrw_check(env, csrno, write_mask);
+    RISCVException ret = riscv_csrrw_check(env, csrno, true);
     if (ret != RISCV_EXCP_NONE) {
         return ret;
     }
@@ -XXX,XX +XXX,XX @@ static RISCVException riscv_csrrw_do128(CPURISCVState *env, int csrno,
     return RISCV_EXCP_NONE;
 }
 
+RISCVException riscv_csrr_i128(CPURISCVState *env, int csrno,
+                               Int128 *ret_value)
+{
+    RISCVException ret;
+
+    ret = riscv_csrrw_check(env, csrno, false);
+    if (ret != RISCV_EXCP_NONE) {
+        return ret;
+    }
+
+    if (csr_ops[csrno].read128) {
+        return riscv_csrrw_do128(env, csrno, ret_value,
+                                 int128_zero(), int128_zero());
+    }
+
+    /*
+     * Fall back to 64-bit version for now, if the 128-bit alternative isn't
+     * at all defined.
+     * Note, some CSRs don't need to extend to MXLEN (64 upper bits non
+     * significant), for those, this fallback is correctly handling the
+     * accesses
+     */
+    target_ulong old_value;
+    ret = riscv_csrrw_do64(env, csrno, &old_value,
+                           (target_ulong)0,
+                           (target_ulong)0);
+    if (ret == RISCV_EXCP_NONE && ret_value) {
+        *ret_value = int128_make64(old_value);
+    }
+    return ret;
+}
+
 RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno,
                                 Int128 *ret_value,
                                 Int128 new_value, Int128 write_mask)
 {
     RISCVException ret;
 
-    ret = riscv_csrrw_check(env, csrno, int128_nz(write_mask));
+    ret = riscv_csrrw_check(env, csrno, true);
     if (ret != RISCV_EXCP_NONE) {
         return ret;
     }
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -XXX,XX +XXX,XX @@ target_ulong helper_csrr(CPURISCVState *env, int csr)
     }
 
     target_ulong val = 0;
-    RISCVException ret = riscv_csrrw(env, csr, &val, 0, 0);
+    RISCVException ret = riscv_csrr(env, csr, &val);
 
     if (ret != RISCV_EXCP_NONE) {
         riscv_raise_exception(env, ret, GETPC());
@@ -XXX,XX +XXX,XX @@ target_ulong helper_csrrw(CPURISCVState *env, int csr,
 target_ulong helper_csrr_i128(CPURISCVState *env, int csr)
 {
     Int128 rv = int128_zero();
-    RISCVException ret = riscv_csrrw_i128(env, csr, &rv,
-                                          int128_zero(),
-                                          int128_zero());
+    RISCVException ret = riscv_csrr_i128(env, csr, &rv);
 
     if (ret != RISCV_EXCP_NONE) {
         riscv_raise_exception(env, ret, GETPC());
-- 
2.45.1