Series comparison

-[Qemu-devel] [PULL 0/9] target-arm queue
+[PULL 00/14] target-arm queue
-A last collection of patches to squeeze in before rc0.
+arm pullreq for rc1. All minor bugfixes, except for the sve-default-vector-length
-The patches from me are all bugfixes. Philippe's are just
+patches, which are somewhere between a bugfix and a new feature.
 code-movement, but I wanted to get these into 4.1 because
 that kind of patch is so painful to have to rebase.
 (The diffstat is huge but it's just code moving from file to file.)
 v2: fix up for clash with the qapi refactor which only
 showed up in a build-from-clean.
 thanks
 -- PMM
+The following changes since commit c08ccd1b53f488ac86c1f65cf7623dc91acc249a:
-The following changes since commit c3e1d838cfa5aac1a6210c8ddf182d0ef7d95dd8:
+  Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210726' into staging (2021-07-27 08:35:01 +0100)
   Merge remote-tracking branch 'remotes/kraxel/tags/ui-20190704-pull-request' into staging (2019-07-04 16:43:13 +0100)
 are available in the Git repository at:
-  https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20190704-1
+  https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20210727
-for you to fetch changes up to 89a11ff756410aecb87d2c774df6e45dbf4105c1:
+for you to fetch changes up to e229a179a503f2aee43a76888cf12fbdfe8a3749:
-  target/arm: Correct VMOV_imm_dp handling of short vectors (2019-07-04 17:25:30 +0100)
+  hw: aspeed_gpio: Fix memory size (2021-07-27 11:00:00 +0100)
 ----------------------------------------------------------------
 target-arm queue:
- * more code-movement to separate TCG-only functions into their own files
+ * hw/arm/smmuv3: Check 31st bit to see if CD is valid
- * Correct VMOV_imm_dp handling of short vectors
+ * qemu-options.hx: Fix formatting of -machine memory-backend option
- * Execute Thumb instructions when their condbits are 0xf
+ * hw: aspeed_gpio: Fix memory size
- * armv7m_systick: Forbid non-privileged accesses
+ * hw/arm/nseries: Display hexadecimal value with '0x' prefix
- * Use _ra versions of cpu_stl_data() in v7M helpers
+ * Add sve-default-vector-length cpu property
- * v8M: Check state of exception being returned from
+ * docs: Update path that mentions deprecated.rst
- * v8M: Forcibly clear negative-priority exceptions on deactivate
+ * hw/intc/armv7m_nvic: for v8.1M VECTPENDING hides S exceptions from NS
  * hw/intc/armv7m_nvic: Correct size of ICSR.VECTPENDING
  * hw/intc/armv7m_nvic: ISCR.ISRPENDING is set for non-enabled pending interrupts
  * target/arm: Report M-profile alignment faults correctly to the guest
  * target/arm: Add missing 'return's after calling v7m_exception_taken()
  * target/arm: Enforce that M-profile SP low 2 bits are always zero
 ----------------------------------------------------------------
-Peter Maydell (6):
+Joe Komlodi (1):
-      arm v8M: Forcibly clear negative-priority exceptions on deactivate
+      hw/arm/smmuv3: Check 31st bit to see if CD is valid
       target/arm: v8M: Check state of exception being returned from
       target/arm: Use _ra versions of cpu_stl_data() in v7M helpers
       hw/timer/armv7m_systick: Forbid non-privileged accesses
       target/arm: Execute Thumb instructions when their condbits are 0xf
       target/arm: Correct VMOV_imm_dp handling of short vectors
-Philippe Mathieu-Daudé (3):
+Joel Stanley (1):
-      target/arm: Move debug routines to debug_helper.c
+      hw: aspeed_gpio: Fix memory size
       target/arm: Restrict semi-hosting to TCG
       target/arm/helper: Move M profile routines to m_helper.c
- target/arm/Makefile.objs       |    5 +-
+Mao Zhongyi (1):
- target/arm/cpu.h               |    7 +
+      docs: Update path that mentions deprecated.rst
  hw/intc/armv7m_nvic.c          |   54 +-
  hw/timer/armv7m_systick.c      |   26 +-
  target/arm/cpu.c               |    9 +-
  target/arm/debug_helper.c      |  311 +++++
  target/arm/helper.c            | 2646 +--------------------------------------
  target/arm/m_helper.c          | 2679 ++++++++++++++++++++++++++++++++++++++++
  target/arm/op_helper.c         |  295 -----
  target/arm/translate-vfp.inc.c |    2 +-
  target/arm/translate.c         |   15 +-
 files changed, 3096 insertions(+), 2953 deletions(-)
  create mode 100644 target/arm/debug_helper.c
  create mode 100644 target/arm/m_helper.c
+Peter Maydell (7):
+      qemu-options.hx: Fix formatting of -machine memory-backend option
+      target/arm: Enforce that M-profile SP low 2 bits are always zero
+      target/arm: Add missing 'return's after calling v7m_exception_taken()
+      target/arm: Report M-profile alignment faults correctly to the guest
+      hw/intc/armv7m_nvic: ISCR.ISRPENDING is set for non-enabled pending interrupts
+      hw/intc/armv7m_nvic: Correct size of ICSR.VECTPENDING
+      hw/intc/armv7m_nvic: for v8.1M VECTPENDING hides S exceptions from NS
+Philippe Mathieu-Daudé (1):
+      hw/arm/nseries: Display hexadecimal value with '0x' prefix
+Richard Henderson (3):
+      target/arm: Correctly bound length in sve_zcr_get_valid_len
+      target/arm: Export aarch64_sve_zcr_get_valid_len
+      target/arm: Add sve-default-vector-length cpu property
+ docs/system/arm/cpu-features.rst | 15 ++++++++++
+ configure                        |  2 +-
+ hw/arm/smmuv3-internal.h         |  2 +-
+ target/arm/cpu.h                 |  5 ++++
+ target/arm/internals.h           | 10 +++++++
+ hw/arm/nseries.c                 |  2 +-
+ hw/gpio/aspeed_gpio.c            |  3 +-
+ hw/intc/armv7m_nvic.c            | 40 +++++++++++++++++++--------
+ target/arm/cpu.c                 | 14 ++++++++--
+ target/arm/cpu64.c               | 60 ++++++++++++++++++++++++++++++++++++++++
+ target/arm/gdbstub.c             |  4 +++
+ target/arm/helper.c              |  8 ++++--
+ target/arm/m_helper.c            | 24 ++++++++++++----
+ target/arm/translate.c           |  3 ++
+ target/i386/cpu.c                |  2 +-
+ MAINTAINERS                      |  2 +-
+ qemu-options.hx                  | 30 +++++++++++---------
+files changed, 183 insertions(+), 43 deletions(-)

-New patch
+[PULL 01/14] hw/arm/smmuv3: Check 31st bit to see if CD is valid
+From: Joe Komlodi <joe.komlodi@xilinx.com>
+The bit to see if a CD is valid is the last bit of the first word of the CD.
+Signed-off-by: Joe Komlodi <joe.komlodi@xilinx.com>
+Message-id: 1626728232-134665-2-git-send-email-joe.komlodi@xilinx.com
+Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ hw/arm/smmuv3-internal.h | 2 +-
+file changed, 1 insertion(+), 1 deletion(-)
+diff --git a/hw/arm/smmuv3-internal.h b/hw/arm/smmuv3-internal.h
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/arm/smmuv3-internal.h
++++ b/hw/arm/smmuv3-internal.h
+@@ -XXX,XX +XXX,XX @@ static inline int pa_range(STE *ste)
+ /* CD fields */
+-#define CD_VALID(x)   extract32((x)->word[0], 30, 1)
++#define CD_VALID(x)   extract32((x)->word[0], 31, 1)
+ #define CD_ASID(x)    extract32((x)->word[1], 16, 16)
+ #define CD_TTB(x, sel)                                      \
+     ({                                                      \
+--
+.20.1

-New patch
+[PULL 02/14] qemu-options.hx: Fix formatting of -machine memory-backend option
+The documentation of the -machine memory-backend has some minor
+formatting errors:
+ * Misindentation of the initial line meant that the whole option
+   section is incorrectly indented in the HTML output compared to
+   the other -machine options
+ * The examples weren't indented, which meant that they were formatted
+   as plain run-on text including outputting the "::" as text.
+ * The a) b) list has no rst-format markup so it is rendered as
+   a single run-on paragraph
+Fix the formatting.
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Igor Mammedov <imammedo@redhat.com>
+Message-id: 20210719105257.3599-1-peter.maydell@linaro.org
+---
+ qemu-options.hx | 30 +++++++++++++++++-------------
+file changed, 17 insertions(+), 13 deletions(-)
+diff --git a/qemu-options.hx b/qemu-options.hx
+index XXXXXXX..XXXXXXX 100644
+--- a/qemu-options.hx
++++ b/qemu-options.hx
+@@ -XXX,XX +XXX,XX @@ SRST
+         Enables or disables ACPI Heterogeneous Memory Attribute Table
+         (HMAT) support. The default is off.
+-     ``memory-backend='id'``
++    ``memory-backend='id'``
+         An alternative to legacy ``-mem-path`` and ``mem-prealloc`` options.
+         Allows to use a memory backend as main RAM.
+         For example:
+         ::
+-        -object memory-backend-file,id=pc.ram,size=512M,mem-path=/hugetlbfs,prealloc=on,share=on
+-        -machine memory-backend=pc.ram
+-        -m 512M
++
++            -object memory-backend-file,id=pc.ram,size=512M,mem-path=/hugetlbfs,prealloc=on,share=on
++            -machine memory-backend=pc.ram
++            -m 512M
+         Migration compatibility note:
+-        a) as backend id one shall use value of 'default-ram-id', advertised by
+-        machine type (available via ``query-machines`` QMP command), if migration
+-        to/from old QEMU (<5.0) is expected.
+-        b) for machine types 4.0 and older, user shall
+-        use ``x-use-canonical-path-for-ramblock-id=off`` backend option
+-        if migration to/from old QEMU (<5.0) is expected.
++
++        * as backend id one shall use value of 'default-ram-id', advertised by
++          machine type (available via ``query-machines`` QMP command), if migration
++          to/from old QEMU (<5.0) is expected.
++        * for machine types 4.0 and older, user shall
++          use ``x-use-canonical-path-for-ramblock-id=off`` backend option
++          if migration to/from old QEMU (<5.0) is expected.
++
+         For example:
+         ::
+-        -object memory-backend-ram,id=pc.ram,size=512M,x-use-canonical-path-for-ramblock-id=off
+-        -machine memory-backend=pc.ram
+-        -m 512M
++
++            -object memory-backend-ram,id=pc.ram,size=512M,x-use-canonical-path-for-ramblock-id=off
++            -machine memory-backend=pc.ram
++            -m 512M
+ ERST
+ HXCOMM Deprecated by -machine
+--
+.20.1

-New patch
+[PULL 03/14] target/arm: Enforce that M-profile SP low 2 bits are always zero
+For M-profile, unlike A-profile, the low 2 bits of SP are defined to be
+RES0H, which is to say that they must be hardwired to zero so that
+guest attempts to write non-zero values to them are ignored.
+Implement this behaviour by masking out the low bits:
+ * for writes to r13 by the gdbstub
+ * for writes to any of the various flavours of SP via MSR
+ * for writes to r13 via store_reg() in generated code
+Note that all the direct uses of cpu_R[] in translate.c are in places
+where the register is definitely not r13 (usually because that has
+been checked for as an UNDEFINED or UNPREDICTABLE case and handled as
+UNDEF).
+All the other writes to regs[13] in C code are either:
+ * A-profile only code
+ * writes of values we can guarantee to be aligned, such as
+   - writes of previous-SP-value plus or minus a 4-aligned constant
+   - writes of the value in an SP limit register (which we already
+     enforce to be aligned)
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210723162146.5167-2-peter.maydell@linaro.org
+---
+ target/arm/gdbstub.c   |  4 ++++
+ target/arm/m_helper.c  | 14 ++++++++------
+ target/arm/translate.c |  3 +++
+files changed, 15 insertions(+), 6 deletions(-)
+diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/gdbstub.c
++++ b/target/arm/gdbstub.c
+@@ -XXX,XX +XXX,XX @@ int arm_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
+     if (n < 16) {
+         /* Core integer register.  */
++        if (n == 13 && arm_feature(env, ARM_FEATURE_M)) {
++            /* M profile SP low bits are always 0 */
++            tmp &= ~3;
++        }
+         env->regs[n] = tmp;
+         return 4;
+     }
+diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/m_helper.c
++++ b/target/arm/m_helper.c
+@@ -XXX,XX +XXX,XX @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
+             if (!env->v7m.secure) {
+                 return;
+             }
+-            env->v7m.other_ss_msp = val;
++            env->v7m.other_ss_msp = val & ~3;
+             return;
+         case 0x89: /* PSP_NS */
+             if (!env->v7m.secure) {
+                 return;
+             }
+-            env->v7m.other_ss_psp = val;
++            env->v7m.other_ss_psp = val & ~3;
+             return;
+         case 0x8a: /* MSPLIM_NS */
+             if (!env->v7m.secure) {
+@@ -XXX,XX +XXX,XX @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
+             limit = is_psp ? env->v7m.psplim[false] : env->v7m.msplim[false];
++            val &= ~0x3;
++
+             if (val < limit) {
+                 raise_exception_ra(env, EXCP_STKOF, 0, 1, GETPC());
+             }
+@@ -XXX,XX +XXX,XX @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
+         break;
+     case 8: /* MSP */
+         if (v7m_using_psp(env)) {
+-            env->v7m.other_sp = val;
++            env->v7m.other_sp = val & ~3;
+         } else {
+-            env->regs[13] = val;
++            env->regs[13] = val & ~3;
+         }
+         break;
+     case 9: /* PSP */
+         if (v7m_using_psp(env)) {
+-            env->regs[13] = val;
++            env->regs[13] = val & ~3;
+         } else {
+-            env->v7m.other_sp = val;
++            env->v7m.other_sp = val & ~3;
+         }
+         break;
+     case 10: /* MSPLIM */
+diff --git a/target/arm/translate.c b/target/arm/translate.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/translate.c
++++ b/target/arm/translate.c
+@@ -XXX,XX +XXX,XX @@ void store_reg(DisasContext *s, int reg, TCGv_i32 var)
+          */
+         tcg_gen_andi_i32(var, var, s->thumb ? ~1 : ~3);
+         s->base.is_jmp = DISAS_JUMP;
++    } else if (reg == 13 && arm_dc_feature(s, ARM_FEATURE_M)) {
++        /* For M-profile SP bits [1:0] are always zero */
++        tcg_gen_andi_i32(var, var, ~3);
+     }
+     tcg_gen_mov_i32(cpu_R[reg], var);
+     tcg_temp_free_i32(var);
+--
+.20.1

-New patch
+[PULL 04/14] target/arm: Add missing 'return's after calling v7m_exception_taken()
+In do_v7m_exception_exit(), we perform various checks as part of
+performing the exception return.  If one of these checks fails, the
+architecture requires that we take an appropriate exception on the
+existing stackframe.  We implement this by calling
+v7m_exception_taken() to set up to take the new exception, and then
+immediately returning from do_v7m_exception_exit() without proceeding
+any further with the unstack-and-exception-return process.
+In a couple of checks that are new in v8.1M, we forgot the "return"
+statement, with the effect that if bad code in the guest tripped over
+these checks we would set up to take a UsageFault exception but then
+blunder on trying to also unstack and return from the original
+exception, with the probable result that the guest would crash.
+Add the missing return statements.
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210723162146.5167-3-peter.maydell@linaro.org
+---
+ target/arm/m_helper.c | 2 ++
+file changed, 2 insertions(+)
+diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/m_helper.c
++++ b/target/arm/m_helper.c
+@@ -XXX,XX +XXX,XX @@ static void do_v7m_exception_exit(ARMCPU *cpu)
+                     qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on existing "
+                         "stackframe: NSACR prevents clearing FPU registers\n");
+                     v7m_exception_taken(cpu, excret, true, false);
++                    return;
+                 } else if (!cpacr_pass) {
+                     armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE,
+                                             exc_secure);
+@@ -XXX,XX +XXX,XX @@ static void do_v7m_exception_exit(ARMCPU *cpu)
+                     qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on existing "
+                         "stackframe: CPACR prevents clearing FPU registers\n");
+                     v7m_exception_taken(cpu, excret, true, false);
++                    return;
+                 }
+             }
+             /* Clear s0..s15, FPSCR and VPR */
+--
+.20.1

-New patch
+[PULL 05/14] target/arm: Report M-profile alignment faults correctly to the guest
+For M-profile, we weren't reporting alignment faults triggered by the
+generic TCG code correctly to the guest.  These get passed into
+arm_v7m_cpu_do_interrupt() as an EXCP_DATA_ABORT with an A-profile
+style exception.fsr value of 1.  We didn't check for this, and so
+they fell through into the default of "assume this is an MPU fault"
+and were reported to the guest as a data access violation MPU fault.
+Report these alignment faults as UsageFaults which set the UNALIGNED
+bit in the UFSR.
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210723162146.5167-4-peter.maydell@linaro.org
+---
+ target/arm/m_helper.c | 8 ++++++++
+file changed, 8 insertions(+)
+diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/m_helper.c
++++ b/target/arm/m_helper.c
+@@ -XXX,XX +XXX,XX @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
+         env->v7m.sfsr |= R_V7M_SFSR_LSERR_MASK;
+         break;
+     case EXCP_UNALIGNED:
++        /* Unaligned faults reported by M-profile aware code */
+         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
+         env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_UNALIGNED_MASK;
+         break;
+@@ -XXX,XX +XXX,XX @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
+             }
+             armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_BUS, false);
+             break;
++        case 0x1: /* Alignment fault reported by generic code */
++            qemu_log_mask(CPU_LOG_INT,
++                          "...really UsageFault with UFSR.UNALIGNED\n");
++            env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_UNALIGNED_MASK;
++            armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE,
++                                    env->v7m.secure);
++            break;
+         default:
+             /*
+              * All other FSR values are either MPU faults or "can't happen
+--
+.20.1

-New patch
+[PULL 06/14] hw/intc/armv7m_nvic: ISCR.ISRPENDING is set for non-enabled pending interrupts
+The ISCR.ISRPENDING bit is set when an external interrupt is pending.
+This is true whether that external interrupt is enabled or not.
+This means that we can't use 's->vectpending == 0' as a shortcut to
+"ISRPENDING is zero", because s->vectpending indicates only the
+highest priority pending enabled interrupt.
+Remove the incorrect optimization so that if there is no pending
+enabled interrupt we fall through to scanning through the whole
+interrupt array.
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210723162146.5167-5-peter.maydell@linaro.org
+---
+ hw/intc/armv7m_nvic.c | 9 ++++-----
+file changed, 4 insertions(+), 5 deletions(-)
+diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/intc/armv7m_nvic.c
++++ b/hw/intc/armv7m_nvic.c
+@@ -XXX,XX +XXX,XX @@ static bool nvic_isrpending(NVICState *s)
+ {
+     int irq;
+-    /* We can shortcut if the highest priority pending interrupt
+-     * happens to be external or if there is nothing pending.
++    /*
++     * We can shortcut if the highest priority pending interrupt
++     * happens to be external; if not we need to check the whole
++     * vectors[] array.
+      */
+     if (s->vectpending > NVIC_FIRST_IRQ) {
+         return true;
+     }
+-    if (s->vectpending == 0) {
+-        return false;
+-    }
+     for (irq = NVIC_FIRST_IRQ; irq < s->num_irq; irq++) {
+         if (s->vectors[irq].pending) {
+--
+.20.1

-New patch
+[PULL 07/14] hw/intc/armv7m_nvic: Correct size of ICSR.VECTPENDING
+The VECTPENDING field in the ICSR is 9 bits wide, in bits [20:12] of
+the register.  We were incorrectly masking it to 8 bits, so it would
+report the wrong value if the pending exception was greater than 256.
+Fix the bug.
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210723162146.5167-6-peter.maydell@linaro.org
+---
+ hw/intc/armv7m_nvic.c | 2 +-
+file changed, 1 insertion(+), 1 deletion(-)
+diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/intc/armv7m_nvic.c
++++ b/hw/intc/armv7m_nvic.c
+@@ -XXX,XX +XXX,XX @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
+         /* VECTACTIVE */
+         val = cpu->env.v7m.exception;
+         /* VECTPENDING */
+-        val |= (s->vectpending & 0xff) << 12;
++        val |= (s->vectpending & 0x1ff) << 12;
+         /* ISRPENDING - set if any external IRQ is pending */
+         if (nvic_isrpending(s)) {
+             val |= (1 << 22);
+--
+.20.1

-New patch
+[PULL 08/14] hw/intc/armv7m_nvic: for v8.1M VECTPENDING hides S exceptions from NS
+In Arm v8.1M the VECTPENDING field in the ICSR has new behaviour: if
+the register is accessed NonSecure and the highest priority pending
+enabled exception (that would be returned in the VECTPENDING field)
+targets Secure, then the VECTPENDING field must read 1 rather than
+the exception number of the pending exception. Implement this.
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210723162146.5167-7-peter.maydell@linaro.org
+---
+ hw/intc/armv7m_nvic.c | 31 ++++++++++++++++++++++++-------
+file changed, 24 insertions(+), 7 deletions(-)
+diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/intc/armv7m_nvic.c
++++ b/hw/intc/armv7m_nvic.c
+@@ -XXX,XX +XXX,XX @@ void armv7m_nvic_acknowledge_irq(void *opaque)
+     nvic_irq_update(s);
+ }
++static bool vectpending_targets_secure(NVICState *s)
++{
++    /* Return true if s->vectpending targets Secure state */
++    if (s->vectpending_is_s_banked) {
++        return true;
++    }
++    return !exc_is_banked(s->vectpending) &&
++        exc_targets_secure(s, s->vectpending);
++}
++
+ void armv7m_nvic_get_pending_irq_info(void *opaque,
+                                       int *pirq, bool *ptargets_secure)
+ {
+@@ -XXX,XX +XXX,XX @@ void armv7m_nvic_get_pending_irq_info(void *opaque,
+     assert(pending > ARMV7M_EXCP_RESET && pending < s->num_irq);
+-    if (s->vectpending_is_s_banked) {
+-        targets_secure = true;
+-    } else {
+-        targets_secure = !exc_is_banked(pending) &&
+-            exc_targets_secure(s, pending);
+-    }
++    targets_secure = vectpending_targets_secure(s);
+     trace_nvic_get_pending_irq_info(pending, targets_secure);
+@@ -XXX,XX +XXX,XX @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
+         /* VECTACTIVE */
+         val = cpu->env.v7m.exception;
+         /* VECTPENDING */
+-        val |= (s->vectpending & 0x1ff) << 12;
++        if (s->vectpending) {
++            /*
++             * From v8.1M VECTPENDING must read as 1 if accessed as
++             * NonSecure and the highest priority pending and enabled
++             * exception targets Secure.
++             */
++            int vp = s->vectpending;
++            if (!attrs.secure && arm_feature(&cpu->env, ARM_FEATURE_V8_1M) &&
++                vectpending_targets_secure(s)) {
++                vp = 1;
++            }
++            val |= (vp & 0x1ff) << 12;
++        }
+         /* ISRPENDING - set if any external IRQ is pending */
+         if (nvic_isrpending(s)) {
+             val |= (1 << 22);
+--
+.20.1

-New patch
+[PULL 09/14] docs: Update path that mentions deprecated.rst
+From: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
+Missed in commit f3478392 "docs: Move deprecation, build
+and license info out of system/"
+Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
+Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
+Message-id: 20210723065828.1336760-1-maozhongyi@cmss.chinamobile.com
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ configure         | 2 +-
+ target/i386/cpu.c | 2 +-
+ MAINTAINERS       | 2 +-
+files changed, 3 insertions(+), 3 deletions(-)
+diff --git a/configure b/configure
+index XXXXXXX..XXXXXXX 100755
+--- a/configure
++++ b/configure
+@@ -XXX,XX +XXX,XX @@ fi
+ if test -n "${deprecated_features}"; then
+     echo "Warning, deprecated features enabled."
+-    echo "Please see docs/system/deprecated.rst"
++    echo "Please see docs/about/deprecated.rst"
+     echo "  features: ${deprecated_features}"
+ fi
+diff --git a/target/i386/cpu.c b/target/i386/cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/i386/cpu.c
++++ b/target/i386/cpu.c
+@@ -XXX,XX +XXX,XX @@ static const X86CPUDefinition builtin_x86_defs[] = {
+  * none", but this is just for compatibility while libvirt isn't
+  * adapted to resolve CPU model versions before creating VMs.
+  * See "Runnability guarantee of CPU models" at
+- * docs/system/deprecated.rst.
++ * docs/about/deprecated.rst.
+  */
+ X86CPUVersion default_cpu_version = 1;
+diff --git a/MAINTAINERS b/MAINTAINERS
+index XXXXXXX..XXXXXXX 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -XXX,XX +XXX,XX @@ F: contrib/gitdm/*
+ Incompatible changes
+ R: libvir-list@redhat.com
+-F: docs/system/deprecated.rst
++F: docs/about/deprecated.rst
+ Build System
+ ------------
+--
+.20.1

-New patch
+[PULL 10/14] target/arm: Correctly bound length in sve_zcr_get_valid_len
+From: Richard Henderson <richard.henderson@linaro.org>
+Currently, our only caller is sve_zcr_len_for_el, which has
+already masked the length extracted from ZCR_ELx, so the
+masking done here is a nop.  But we will shortly have uses
+from other locations, where the length will be unmasked.
+Saturate the length to ARM_MAX_VQ instead of truncating to
+the low 4 bits.
+Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
+Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
+Message-id: 20210723203344.968563-2-richard.henderson@linaro.org
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ target/arm/helper.c | 4 +++-
+file changed, 3 insertions(+), 1 deletion(-)
+diff --git a/target/arm/helper.c b/target/arm/helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/helper.c
++++ b/target/arm/helper.c
+@@ -XXX,XX +XXX,XX @@ static uint32_t sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
+ {
+     uint32_t end_len;
+-    end_len = start_len &= 0xf;
++    start_len = MIN(start_len, ARM_MAX_VQ - 1);
++    end_len = start_len;
++
+     if (!test_bit(start_len, cpu->sve_vq_map)) {
+         end_len = find_last_bit(cpu->sve_vq_map, start_len);
+         assert(end_len < start_len);
+--
+.20.1

-New patch
+[PULL 11/14] target/arm: Export aarch64_sve_zcr_get_valid_len
+From: Richard Henderson <richard.henderson@linaro.org>
+Rename from sve_zcr_get_valid_len and make accessible
+from outside of helper.c.
+Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
+Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
+Message-id: 20210723203344.968563-3-richard.henderson@linaro.org
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ target/arm/internals.h | 10 ++++++++++
+ target/arm/helper.c    |  4 ++--
+files changed, 12 insertions(+), 2 deletions(-)
+diff --git a/target/arm/internals.h b/target/arm/internals.h
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/internals.h
++++ b/target/arm/internals.h
+@@ -XXX,XX +XXX,XX @@ void arm_translate_init(void);
+ void arm_cpu_synchronize_from_tb(CPUState *cs, const TranslationBlock *tb);
+ #endif /* CONFIG_TCG */
++/**
++ * aarch64_sve_zcr_get_valid_len:
++ * @cpu: cpu context
++ * @start_len: maximum len to consider
++ *
++ * Return the maximum supported sve vector length <= @start_len.
++ * Note that both @start_len and the return value are in units
++ * of ZCR_ELx.LEN, so the vector bit length is (x + 1) * 128.
++ */
++uint32_t aarch64_sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len);
+ enum arm_fprounding {
+     FPROUNDING_TIEEVEN,
+diff --git a/target/arm/helper.c b/target/arm/helper.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/helper.c
++++ b/target/arm/helper.c
+@@ -XXX,XX +XXX,XX @@ int sve_exception_el(CPUARMState *env, int el)
+     return 0;
+ }
+-static uint32_t sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
++uint32_t aarch64_sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
+ {
+     uint32_t end_len;
+@@ -XXX,XX +XXX,XX @@ uint32_t sve_zcr_len_for_el(CPUARMState *env, int el)
+         zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[3]);
+     }
+-    return sve_zcr_get_valid_len(cpu, zcr_len);
++    return aarch64_sve_zcr_get_valid_len(cpu, zcr_len);
+ }
+ static void zcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
+--
+.20.1

-New patch
+[PULL 12/14] target/arm: Add sve-default-vector-length cpu property
+From: Richard Henderson <richard.henderson@linaro.org>
+Mirror the behavour of /proc/sys/abi/sve_default_vector_length
+under the real linux kernel.  We have no way of passing along
+a real default across exec like the kernel can, but this is a
+decent way of adjusting the startup vector length of a process.
+Resolves: https://gitlab.com/qemu-project/qemu/-/issues/482
+Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
+Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
+Message-id: 20210723203344.968563-4-richard.henderson@linaro.org
+[PMM: tweaked docs formatting, document -1 special-case,
+ added fixup patch from RTH mentioning QEMU's maximum veclen.]
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ docs/system/arm/cpu-features.rst | 15 ++++++++
+ target/arm/cpu.h                 |  5 +++
+ target/arm/cpu.c                 | 14 ++++++--
+ target/arm/cpu64.c               | 60 ++++++++++++++++++++++++++++++++
+files changed, 92 insertions(+), 2 deletions(-)
+diff --git a/docs/system/arm/cpu-features.rst b/docs/system/arm/cpu-features.rst
+index XXXXXXX..XXXXXXX 100644
+--- a/docs/system/arm/cpu-features.rst
++++ b/docs/system/arm/cpu-features.rst
+@@ -XXX,XX +XXX,XX @@ verbose command lines.  However, the recommended way to select vector
+ lengths is to explicitly enable each desired length.  Therefore only
+ example's (1), (4), and (6) exhibit recommended uses of the properties.
++SVE User-mode Default Vector Length Property
++--------------------------------------------
++
++For qemu-aarch64, the cpu property ``sve-default-vector-length=N`` is
++defined to mirror the Linux kernel parameter file
++``/proc/sys/abi/sve_default_vector_length``.  The default length, ``N``,
++is in units of bytes and must be between 16 and 8192.
++If not specified, the default vector length is 64.
++
++If the default length is larger than the maximum vector length enabled,
++the actual vector length will be reduced.  Note that the maximum vector
++length supported by QEMU is 256.
++
++If this property is set to ``-1`` then the default vector length
++is set to the maximum possible length.
+diff --git a/target/arm/cpu.h b/target/arm/cpu.h
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/cpu.h
++++ b/target/arm/cpu.h
+@@ -XXX,XX +XXX,XX @@ struct ARMCPU {
+     /* Used to set the maximum vector length the cpu will support.  */
+     uint32_t sve_max_vq;
++#ifdef CONFIG_USER_ONLY
++    /* Used to set the default vector length at process start. */
++    uint32_t sve_default_vq;
++#endif
++
+     /*
+      * In sve_vq_map each set bit is a supported vector length of
+      * (bit-number + 1) * 16 bytes, i.e. each bit number + 1 is the vector
+diff --git a/target/arm/cpu.c b/target/arm/cpu.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/cpu.c
++++ b/target/arm/cpu.c
+@@ -XXX,XX +XXX,XX @@ static void arm_cpu_reset(DeviceState *dev)
+         env->cp15.cpacr_el1 = deposit64(env->cp15.cpacr_el1, 16, 2, 3);
+         /* with reasonable vector length */
+         if (cpu_isar_feature(aa64_sve, cpu)) {
+-            env->vfp.zcr_el[1] = MIN(cpu->sve_max_vq - 1, 3);
++            env->vfp.zcr_el[1] =
++                aarch64_sve_zcr_get_valid_len(cpu, cpu->sve_default_vq - 1);
+         }
+         /*
+          * Enable TBI0 but not TBI1.
+@@ -XXX,XX +XXX,XX @@ static void arm_cpu_initfn(Object *obj)
+     QLIST_INIT(&cpu->pre_el_change_hooks);
+     QLIST_INIT(&cpu->el_change_hooks);
+-#ifndef CONFIG_USER_ONLY
++#ifdef CONFIG_USER_ONLY
++# ifdef TARGET_AARCH64
++    /*
++     * The linux kernel defaults to 512-bit vectors, when sve is supported.
++     * See documentation for /proc/sys/abi/sve_default_vector_length, and
++     * our corresponding sve-default-vector-length cpu property.
++     */
++    cpu->sve_default_vq = 4;
++# endif
++#else
+     /* Our inbound IRQ and FIQ lines */
+     if (kvm_enabled()) {
+         /* VIRQ and VFIQ are unused with KVM but we add them to maintain
+diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
+index XXXXXXX..XXXXXXX 100644
+--- a/target/arm/cpu64.c
++++ b/target/arm/cpu64.c
+@@ -XXX,XX +XXX,XX @@ static void cpu_arm_set_sve(Object *obj, bool value, Error **errp)
+     cpu->isar.id_aa64pfr0 = t;
+ }
++#ifdef CONFIG_USER_ONLY
++/* Mirror linux /proc/sys/abi/sve_default_vector_length. */
++static void cpu_arm_set_sve_default_vec_len(Object *obj, Visitor *v,
++                                            const char *name, void *opaque,
++                                            Error **errp)
++{
++    ARMCPU *cpu = ARM_CPU(obj);
++    int32_t default_len, default_vq, remainder;
++
++    if (!visit_type_int32(v, name, &default_len, errp)) {
++        return;
++    }
++
++    /* Undocumented, but the kernel allows -1 to indicate "maximum". */
++    if (default_len == -1) {
++        cpu->sve_default_vq = ARM_MAX_VQ;
++        return;
++    }
++
++    default_vq = default_len / 16;
++    remainder = default_len % 16;
++
++    /*
++     * Note that the 512 max comes from include/uapi/asm/sve_context.h
++     * and is the maximum architectural width of ZCR_ELx.LEN.
++     */
++    if (remainder || default_vq < 1 || default_vq > 512) {
++        error_setg(errp, "cannot set sve-default-vector-length");
++        if (remainder) {
++            error_append_hint(errp, "Vector length not a multiple of 16\n");
++        } else if (default_vq < 1) {
++            error_append_hint(errp, "Vector length smaller than 16\n");
++        } else {
++            error_append_hint(errp, "Vector length larger than %d\n",
++                              512 * 16);
++        }
++        return;
++    }
++
++    cpu->sve_default_vq = default_vq;
++}
++
++static void cpu_arm_get_sve_default_vec_len(Object *obj, Visitor *v,
++                                            const char *name, void *opaque,
++                                            Error **errp)
++{
++    ARMCPU *cpu = ARM_CPU(obj);
++    int32_t value = cpu->sve_default_vq * 16;
++
++    visit_type_int32(v, name, &value, errp);
++}
++#endif
++
+ void aarch64_add_sve_properties(Object *obj)
+ {
+     uint32_t vq;
+@@ -XXX,XX +XXX,XX @@ void aarch64_add_sve_properties(Object *obj)
+         object_property_add(obj, name, "bool", cpu_arm_get_sve_vq,
+                             cpu_arm_set_sve_vq, NULL, NULL);
+     }
++
++#ifdef CONFIG_USER_ONLY
++    /* Mirror linux /proc/sys/abi/sve_default_vector_length. */
++    object_property_add(obj, "sve-default-vector-length", "int32",
++                        cpu_arm_get_sve_default_vec_len,
++                        cpu_arm_set_sve_default_vec_len, NULL, NULL);
++#endif
+ }
+ void arm_cpu_pauth_finalize(ARMCPU *cpu, Error **errp)
+--
+.20.1

-New patch
+[PULL 13/14] hw/arm/nseries: Display hexadecimal value with '0x' prefix
+From: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+Message-id: 20210726150953.1218690-1-f4bug@amsat.org
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ hw/arm/nseries.c | 2 +-
+file changed, 1 insertion(+), 1 deletion(-)
+diff --git a/hw/arm/nseries.c b/hw/arm/nseries.c
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/arm/nseries.c
++++ b/hw/arm/nseries.c
+@@ -XXX,XX +XXX,XX @@ static uint32_t mipid_txrx(void *opaque, uint32_t cmd, int len)
+     default:
+     bad_cmd:
+         qemu_log_mask(LOG_GUEST_ERROR,
+-                      "%s: unknown command %02x\n", __func__, s->cmd);
++                      "%s: unknown command 0x%02x\n", __func__, s->cmd);
+         break;
+     }
+--
+.20.1

-New patch
+[PULL 14/14] hw: aspeed_gpio: Fix memory size
+From: Joel Stanley <joel@jms.id.au>
+The macro used to calculate the maximum memory size of the MMIO region
+had a mistake, causing all GPIO models to create a mapping of 0x9D8.
+The intent was to have it be 0x9D8 - 0x800.
+This extra size doesn't matter on ast2400 and ast2500, which have a 4KB
+region set aside for the GPIO controller.
+On the ast2600 the 3.3V and 1.8V GPIO controllers are 2KB apart, so the
+regions would overlap. Worse was the 1.8V controller would map over the
+top of the following peripheral, which happens to be the RTC.
+The mmio region used by each device is a maximum of 2KB, so avoid the
+calculations and hard code this as the maximum.
+Fixes: 36d737ee82b2 ("hw/gpio: Add in AST2600 specific implementation")
+Signed-off-by: Joel Stanley <joel@jms.id.au>
+Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
+Reviewed-by: Cédric Le Goater <clg@kaod.org>
+Message-id: 20210713065854.134634-2-joel@jms.id.au
+[PMM: fix autocorrect error in commit message]
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ hw/gpio/aspeed_gpio.c | 3 +--
+file changed, 1 insertion(+), 2 deletions(-)
+diff --git a/hw/gpio/aspeed_gpio.c b/hw/gpio/aspeed_gpio.c
+index XXXXXXX..XXXXXXX 100644
+--- a/hw/gpio/aspeed_gpio.c
++++ b/hw/gpio/aspeed_gpio.c
+@@ -XXX,XX +XXX,XX @@
+ #define GPIO_1_8V_MEM_SIZE            0x9D8
+ #define GPIO_1_8V_REG_ARRAY_SIZE      ((GPIO_1_8V_MEM_SIZE - \
+                                       GPIO_1_8V_REG_OFFSET) >> 2)
+-#define GPIO_MAX_MEM_SIZE           MAX(GPIO_3_6V_MEM_SIZE, GPIO_1_8V_MEM_SIZE)
+ static int aspeed_evaluate_irq(GPIOSets *regs, int gpio_prev_high, int gpio)
+ {
+@@ -XXX,XX +XXX,XX @@ static void aspeed_gpio_realize(DeviceState *dev, Error **errp)
+     }
+     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_gpio_ops, s,
+-            TYPE_ASPEED_GPIO, GPIO_MAX_MEM_SIZE);
++            TYPE_ASPEED_GPIO, 0x800);
+     sysbus_init_mmio(sbd, &s->iomem);
+ }
+--
+.20.1

A last collection of patches to squeeze in before rc0.
The patches from me are all bugfixes. Philippe's are just
code-movement, but I wanted to get these into 4.1 because
that kind of patch is so painful to have to rebase.
(The diffstat is huge but it's just code moving from file to file.)

v2: fix up for clash with the qapi refactor which only
showed up in a build-from-clean.

thanks
-- PMM

The following changes since commit c3e1d838cfa5aac1a6210c8ddf182d0ef7d95dd8:

Merge remote-tracking branch 'remotes/kraxel/tags/ui-20190704-pull-request' into staging (2019-07-04 16:43:13 +0100)

are available in the Git repository at:

https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20190704-1

for you to fetch changes up to 89a11ff756410aecb87d2c774df6e45dbf4105c1:

target/arm: Correct VMOV_imm_dp handling of short vectors (2019-07-04 17:25:30 +0100)

----------------------------------------------------------------
target-arm queue:
 * more code-movement to separate TCG-only functions into their own files
 * Correct VMOV_imm_dp handling of short vectors
 * Execute Thumb instructions when their condbits are 0xf
 * armv7m_systick: Forbid non-privileged accesses
 * Use _ra versions of cpu_stl_data() in v7M helpers
 * v8M: Check state of exception being returned from
 * v8M: Forcibly clear negative-priority exceptions on deactivate

----------------------------------------------------------------
Peter Maydell (6):
      arm v8M: Forcibly clear negative-priority exceptions on deactivate
      target/arm: v8M: Check state of exception being returned from
      target/arm: Use _ra versions of cpu_stl_data() in v7M helpers
      hw/timer/armv7m_systick: Forbid non-privileged accesses
      target/arm: Execute Thumb instructions when their condbits are 0xf
      target/arm: Correct VMOV_imm_dp handling of short vectors

Philippe Mathieu-Daudé (3):
      target/arm: Move debug routines to debug_helper.c
      target/arm: Restrict semi-hosting to TCG
      target/arm/helper: Move M profile routines to m_helper.c

target/arm/Makefile.objs       |    5 +-
 target/arm/cpu.h               |    7 +
 hw/intc/armv7m_nvic.c          |   54 +-
 hw/timer/armv7m_systick.c      |   26 +-
 target/arm/cpu.c               |    9 +-
 target/arm/debug_helper.c      |  311 +++++
 target/arm/helper.c            | 2646 +--------------------------------------
 target/arm/m_helper.c          | 2679 ++++++++++++++++++++++++++++++++++++++++
 target/arm/op_helper.c         |  295 -----
 target/arm/translate-vfp.inc.c |    2 +-
 target/arm/translate.c         |   15 +-
 11 files changed, 3096 insertions(+), 2953 deletions(-)
 create mode 100644 target/arm/debug_helper.c
 create mode 100644 target/arm/m_helper.c

arm pullreq for rc1. All minor bugfixes, except for the sve-default-vector-length
patches, which are somewhere between a bugfix and a new feature.

thanks
-- PMM

The following changes since commit c08ccd1b53f488ac86c1f65cf7623dc91acc249a:

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210726' into staging (2021-07-27 08:35:01 +0100)

are available in the Git repository at:

https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20210727

for you to fetch changes up to e229a179a503f2aee43a76888cf12fbdfe8a3749:

hw: aspeed_gpio: Fix memory size (2021-07-27 11:00:00 +0100)

----------------------------------------------------------------
target-arm queue:
 * hw/arm/smmuv3: Check 31st bit to see if CD is valid
 * qemu-options.hx: Fix formatting of -machine memory-backend option
 * hw: aspeed_gpio: Fix memory size
 * hw/arm/nseries: Display hexadecimal value with '0x' prefix
 * Add sve-default-vector-length cpu property
 * docs: Update path that mentions deprecated.rst
 * hw/intc/armv7m_nvic: for v8.1M VECTPENDING hides S exceptions from NS
 * hw/intc/armv7m_nvic: Correct size of ICSR.VECTPENDING
 * hw/intc/armv7m_nvic: ISCR.ISRPENDING is set for non-enabled pending interrupts
 * target/arm: Report M-profile alignment faults correctly to the guest
 * target/arm: Add missing 'return's after calling v7m_exception_taken()
 * target/arm: Enforce that M-profile SP low 2 bits are always zero

----------------------------------------------------------------
Joe Komlodi (1):
      hw/arm/smmuv3: Check 31st bit to see if CD is valid

Joel Stanley (1):
      hw: aspeed_gpio: Fix memory size

Mao Zhongyi (1):
      docs: Update path that mentions deprecated.rst

Peter Maydell (7):
      qemu-options.hx: Fix formatting of -machine memory-backend option
      target/arm: Enforce that M-profile SP low 2 bits are always zero
      target/arm: Add missing 'return's after calling v7m_exception_taken()
      target/arm: Report M-profile alignment faults correctly to the guest
      hw/intc/armv7m_nvic: ISCR.ISRPENDING is set for non-enabled pending interrupts
      hw/intc/armv7m_nvic: Correct size of ICSR.VECTPENDING
      hw/intc/armv7m_nvic: for v8.1M VECTPENDING hides S exceptions from NS

Philippe Mathieu-Daudé (1):
      hw/arm/nseries: Display hexadecimal value with '0x' prefix

Richard Henderson (3):
      target/arm: Correctly bound length in sve_zcr_get_valid_len
      target/arm: Export aarch64_sve_zcr_get_valid_len
      target/arm: Add sve-default-vector-length cpu property

The documentation of the -machine memory-backend has some minor
formatting errors:
 * Misindentation of the initial line meant that the whole option
   section is incorrectly indented in the HTML output compared to
   the other -machine options
 * The examples weren't indented, which meant that they were formatted
   as plain run-on text including outputting the "::" as text.
 * The a) b) list has no rst-format markup so it is rendered as
   a single run-on paragraph

Fix the formatting.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20210719105257.3599-1-peter.maydell@linaro.org
---
 qemu-options.hx | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/qemu-options.hx b/qemu-options.hx
index XXXXXXX..XXXXXXX 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -XXX,XX +XXX,XX @@ SRST
         Enables or disables ACPI Heterogeneous Memory Attribute Table
         (HMAT) support. The default is off.
 
-     ``memory-backend='id'``
+    ``memory-backend='id'``
         An alternative to legacy ``-mem-path`` and ``mem-prealloc`` options.
         Allows to use a memory backend as main RAM.
 
         For example:
         ::
-        -object memory-backend-file,id=pc.ram,size=512M,mem-path=/hugetlbfs,prealloc=on,share=on
-        -machine memory-backend=pc.ram
-        -m 512M
+
+            -object memory-backend-file,id=pc.ram,size=512M,mem-path=/hugetlbfs,prealloc=on,share=on
+            -machine memory-backend=pc.ram
+            -m 512M
 
         Migration compatibility note:
-        a) as backend id one shall use value of 'default-ram-id', advertised by
-        machine type (available via ``query-machines`` QMP command), if migration
-        to/from old QEMU (<5.0) is expected.
-        b) for machine types 4.0 and older, user shall
-        use ``x-use-canonical-path-for-ramblock-id=off`` backend option
-        if migration to/from old QEMU (<5.0) is expected.
+
+        * as backend id one shall use value of 'default-ram-id', advertised by
+          machine type (available via ``query-machines`` QMP command), if migration
+          to/from old QEMU (<5.0) is expected.
+        * for machine types 4.0 and older, user shall
+          use ``x-use-canonical-path-for-ramblock-id=off`` backend option
+          if migration to/from old QEMU (<5.0) is expected.
+
         For example:
         ::
-        -object memory-backend-ram,id=pc.ram,size=512M,x-use-canonical-path-for-ramblock-id=off
-        -machine memory-backend=pc.ram
-        -m 512M
+
+            -object memory-backend-ram,id=pc.ram,size=512M,x-use-canonical-path-for-ramblock-id=off
+            -machine memory-backend=pc.ram
+            -m 512M
 ERST
 
 HXCOMM Deprecated by -machine
-- 
2.20.1

For M-profile, unlike A-profile, the low 2 bits of SP are defined to be
RES0H, which is to say that they must be hardwired to zero so that
guest attempts to write non-zero values to them are ignored.

Implement this behaviour by masking out the low bits:
 * for writes to r13 by the gdbstub
 * for writes to any of the various flavours of SP via MSR
 * for writes to r13 via store_reg() in generated code

Note that all the direct uses of cpu_R[] in translate.c are in places
where the register is definitely not r13 (usually because that has
been checked for as an UNDEFINED or UNPREDICTABLE case and handled as
UNDEF).

All the other writes to regs[13] in C code are either:
 * A-profile only code
 * writes of values we can guarantee to be aligned, such as
   - writes of previous-SP-value plus or minus a 4-aligned constant
   - writes of the value in an SP limit register (which we already
     enforce to be aligned)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-2-peter.maydell@linaro.org
---
 target/arm/gdbstub.c   |  4 ++++
 target/arm/m_helper.c  | 14 ++++++++------
 target/arm/translate.c |  3 +++
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/gdbstub.c
+++ b/target/arm/gdbstub.c
@@ -XXX,XX +XXX,XX @@ int arm_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
 
     if (n < 16) {
         /* Core integer register.  */
+        if (n == 13 && arm_feature(env, ARM_FEATURE_M)) {
+            /* M profile SP low bits are always 0 */
+            tmp &= ~3;
+        }
         env->regs[n] = tmp;
         return 4;
     }
diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -XXX,XX +XXX,XX @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
             if (!env->v7m.secure) {
                 return;
             }
-            env->v7m.other_ss_msp = val;
+            env->v7m.other_ss_msp = val & ~3;
             return;
         case 0x89: /* PSP_NS */
             if (!env->v7m.secure) {
                 return;
             }
-            env->v7m.other_ss_psp = val;
+            env->v7m.other_ss_psp = val & ~3;
             return;
         case 0x8a: /* MSPLIM_NS */
             if (!env->v7m.secure) {
@@ -XXX,XX +XXX,XX @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
 
             limit = is_psp ? env->v7m.psplim[false] : env->v7m.msplim[false];
 
+            val &= ~0x3;
+
             if (val < limit) {
                 raise_exception_ra(env, EXCP_STKOF, 0, 1, GETPC());
             }
@@ -XXX,XX +XXX,XX @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val)
         break;
     case 8: /* MSP */
         if (v7m_using_psp(env)) {
-            env->v7m.other_sp = val;
+            env->v7m.other_sp = val & ~3;
         } else {
-            env->regs[13] = val;
+            env->regs[13] = val & ~3;
         }
         break;
     case 9: /* PSP */
         if (v7m_using_psp(env)) {
-            env->regs[13] = val;
+            env->regs[13] = val & ~3;
         } else {
-            env->v7m.other_sp = val;
+            env->v7m.other_sp = val & ~3;
         }
         break;
     case 10: /* MSPLIM */
diff --git a/target/arm/translate.c b/target/arm/translate.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -XXX,XX +XXX,XX @@ void store_reg(DisasContext *s, int reg, TCGv_i32 var)
          */
         tcg_gen_andi_i32(var, var, s->thumb ? ~1 : ~3);
         s->base.is_jmp = DISAS_JUMP;
+    } else if (reg == 13 && arm_dc_feature(s, ARM_FEATURE_M)) {
+        /* For M-profile SP bits [1:0] are always zero */
+        tcg_gen_andi_i32(var, var, ~3);
     }
     tcg_gen_mov_i32(cpu_R[reg], var);
     tcg_temp_free_i32(var);
-- 
2.20.1

In do_v7m_exception_exit(), we perform various checks as part of
performing the exception return.  If one of these checks fails, the
architecture requires that we take an appropriate exception on the
existing stackframe.  We implement this by calling
v7m_exception_taken() to set up to take the new exception, and then
immediately returning from do_v7m_exception_exit() without proceeding
any further with the unstack-and-exception-return process.

In a couple of checks that are new in v8.1M, we forgot the "return"
statement, with the effect that if bad code in the guest tripped over
these checks we would set up to take a UsageFault exception but then
blunder on trying to also unstack and return from the original
exception, with the probable result that the guest would crash.

Add the missing return statements.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-3-peter.maydell@linaro.org
---
 target/arm/m_helper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -XXX,XX +XXX,XX @@ static void do_v7m_exception_exit(ARMCPU *cpu)
                     qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on existing "
                         "stackframe: NSACR prevents clearing FPU registers\n");
                     v7m_exception_taken(cpu, excret, true, false);
+                    return;
                 } else if (!cpacr_pass) {
                     armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE,
                                             exc_secure);
@@ -XXX,XX +XXX,XX @@ static void do_v7m_exception_exit(ARMCPU *cpu)
                     qemu_log_mask(CPU_LOG_INT, "...taking UsageFault on existing "
                         "stackframe: CPACR prevents clearing FPU registers\n");
                     v7m_exception_taken(cpu, excret, true, false);
+                    return;
                 }
             }
             /* Clear s0..s15, FPSCR and VPR */
-- 
2.20.1

For M-profile, we weren't reporting alignment faults triggered by the
generic TCG code correctly to the guest.  These get passed into
arm_v7m_cpu_do_interrupt() as an EXCP_DATA_ABORT with an A-profile
style exception.fsr value of 1.  We didn't check for this, and so
they fell through into the default of "assume this is an MPU fault"
and were reported to the guest as a data access violation MPU fault.

Report these alignment faults as UsageFaults which set the UNALIGNED
bit in the UFSR.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-4-peter.maydell@linaro.org
---
 target/arm/m_helper.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -XXX,XX +XXX,XX @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
         env->v7m.sfsr |= R_V7M_SFSR_LSERR_MASK;
         break;
     case EXCP_UNALIGNED:
+        /* Unaligned faults reported by M-profile aware code */
         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
         env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_UNALIGNED_MASK;
         break;
@@ -XXX,XX +XXX,XX @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
             }
             armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_BUS, false);
             break;
+        case 0x1: /* Alignment fault reported by generic code */
+            qemu_log_mask(CPU_LOG_INT,
+                          "...really UsageFault with UFSR.UNALIGNED\n");
+            env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_UNALIGNED_MASK;
+            armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE,
+                                    env->v7m.secure);
+            break;
         default:
             /*
              * All other FSR values are either MPU faults or "can't happen
-- 
2.20.1

The ISCR.ISRPENDING bit is set when an external interrupt is pending.
This is true whether that external interrupt is enabled or not.
This means that we can't use 's->vectpending == 0' as a shortcut to
"ISRPENDING is zero", because s->vectpending indicates only the
highest priority pending enabled interrupt.

Remove the incorrect optimization so that if there is no pending
enabled interrupt we fall through to scanning through the whole
interrupt array.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-5-peter.maydell@linaro.org
---
 hw/intc/armv7m_nvic.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -XXX,XX +XXX,XX @@ static bool nvic_isrpending(NVICState *s)
 {
     int irq;
 
-    /* We can shortcut if the highest priority pending interrupt
-     * happens to be external or if there is nothing pending.
+    /*
+     * We can shortcut if the highest priority pending interrupt
+     * happens to be external; if not we need to check the whole
+     * vectors[] array.
      */
     if (s->vectpending > NVIC_FIRST_IRQ) {
         return true;
     }
-    if (s->vectpending == 0) {
-        return false;
-    }
 
     for (irq = NVIC_FIRST_IRQ; irq < s->num_irq; irq++) {
         if (s->vectors[irq].pending) {
-- 
2.20.1

The VECTPENDING field in the ICSR is 9 bits wide, in bits [20:12] of
the register.  We were incorrectly masking it to 8 bits, so it would
report the wrong value if the pending exception was greater than 256.
Fix the bug.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-6-peter.maydell@linaro.org
---
 hw/intc/armv7m_nvic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -XXX,XX +XXX,XX @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
         /* VECTACTIVE */
         val = cpu->env.v7m.exception;
         /* VECTPENDING */
-        val |= (s->vectpending & 0xff) << 12;
+        val |= (s->vectpending & 0x1ff) << 12;
         /* ISRPENDING - set if any external IRQ is pending */
         if (nvic_isrpending(s)) {
             val |= (1 << 22);
-- 
2.20.1

In Arm v8.1M the VECTPENDING field in the ICSR has new behaviour: if
the register is accessed NonSecure and the highest priority pending
enabled exception (that would be returned in the VECTPENDING field)
targets Secure, then the VECTPENDING field must read 1 rather than
the exception number of the pending exception. Implement this.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-7-peter.maydell@linaro.org
---
 hw/intc/armv7m_nvic.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -XXX,XX +XXX,XX @@ void armv7m_nvic_acknowledge_irq(void *opaque)
     nvic_irq_update(s);
 }
 
+static bool vectpending_targets_secure(NVICState *s)
+{
+    /* Return true if s->vectpending targets Secure state */
+    if (s->vectpending_is_s_banked) {
+        return true;
+    }
+    return !exc_is_banked(s->vectpending) &&
+        exc_targets_secure(s, s->vectpending);
+}
+
 void armv7m_nvic_get_pending_irq_info(void *opaque,
                                       int *pirq, bool *ptargets_secure)
 {
@@ -XXX,XX +XXX,XX @@ void armv7m_nvic_get_pending_irq_info(void *opaque,
 
     assert(pending > ARMV7M_EXCP_RESET && pending < s->num_irq);
 
-    if (s->vectpending_is_s_banked) {
-        targets_secure = true;
-    } else {
-        targets_secure = !exc_is_banked(pending) &&
-            exc_targets_secure(s, pending);
-    }
+    targets_secure = vectpending_targets_secure(s);
 
     trace_nvic_get_pending_irq_info(pending, targets_secure);
 
@@ -XXX,XX +XXX,XX @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
         /* VECTACTIVE */
         val = cpu->env.v7m.exception;
         /* VECTPENDING */
-        val |= (s->vectpending & 0x1ff) << 12;
+        if (s->vectpending) {
+            /*
+             * From v8.1M VECTPENDING must read as 1 if accessed as
+             * NonSecure and the highest priority pending and enabled
+             * exception targets Secure.
+             */
+            int vp = s->vectpending;
+            if (!attrs.secure && arm_feature(&cpu->env, ARM_FEATURE_V8_1M) &&
+                vectpending_targets_secure(s)) {
+                vp = 1;
+            }
+            val |= (vp & 0x1ff) << 12;
+        }
         /* ISRPENDING - set if any external IRQ is pending */
         if (nvic_isrpending(s)) {
             val |= (1 << 22);
-- 
2.20.1

From: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>

Missed in commit f3478392 "docs: Move deprecation, build
and license info out of system/"

Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20210723065828.1336760-1-maozhongyi@cmss.chinamobile.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 configure         | 2 +-
 target/i386/cpu.c | 2 +-
 MAINTAINERS       | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index XXXXXXX..XXXXXXX 100755
--- a/configure
+++ b/configure
@@ -XXX,XX +XXX,XX @@ fi
 
 if test -n "${deprecated_features}"; then
     echo "Warning, deprecated features enabled."
-    echo "Please see docs/system/deprecated.rst"
+    echo "Please see docs/about/deprecated.rst"
     echo "  features: ${deprecated_features}"
 fi
 
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -XXX,XX +XXX,XX @@ static const X86CPUDefinition builtin_x86_defs[] = {
  * none", but this is just for compatibility while libvirt isn't
  * adapted to resolve CPU model versions before creating VMs.
  * See "Runnability guarantee of CPU models" at
- * docs/system/deprecated.rst.
+ * docs/about/deprecated.rst.
  */
 X86CPUVersion default_cpu_version = 1;
 
diff --git a/MAINTAINERS b/MAINTAINERS
index XXXXXXX..XXXXXXX 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -XXX,XX +XXX,XX @@ F: contrib/gitdm/*
 
 Incompatible changes
 R: libvir-list@redhat.com
-F: docs/system/deprecated.rst
+F: docs/about/deprecated.rst
 
 Build System
 ------------
-- 
2.20.1

From: Richard Henderson <richard.henderson@linaro.org>

Currently, our only caller is sve_zcr_len_for_el, which has
already masked the length extracted from ZCR_ELx, so the
masking done here is a nop.  But we will shortly have uses
from other locations, where the length will be unmasked.

Saturate the length to ARM_MAX_VQ instead of truncating to
the low 4 bits.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20210723203344.968563-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -XXX,XX +XXX,XX @@ static uint32_t sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
 {
     uint32_t end_len;
 
-    end_len = start_len &= 0xf;
+    start_len = MIN(start_len, ARM_MAX_VQ - 1);
+    end_len = start_len;
+
     if (!test_bit(start_len, cpu->sve_vq_map)) {
         end_len = find_last_bit(cpu->sve_vq_map, start_len);
         assert(end_len < start_len);
-- 
2.20.1

From: Richard Henderson <richard.henderson@linaro.org>

Rename from sve_zcr_get_valid_len and make accessible
from outside of helper.c.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20210723203344.968563-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/internals.h | 10 ++++++++++
 target/arm/helper.c    |  4 ++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/target/arm/internals.h b/target/arm/internals.h
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -XXX,XX +XXX,XX @@ void arm_translate_init(void);
 void arm_cpu_synchronize_from_tb(CPUState *cs, const TranslationBlock *tb);
 #endif /* CONFIG_TCG */
 
+/**
+ * aarch64_sve_zcr_get_valid_len:
+ * @cpu: cpu context
+ * @start_len: maximum len to consider
+ *
+ * Return the maximum supported sve vector length <= @start_len.
+ * Note that both @start_len and the return value are in units
+ * of ZCR_ELx.LEN, so the vector bit length is (x + 1) * 128.
+ */
+uint32_t aarch64_sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len);
 
 enum arm_fprounding {
     FPROUNDING_TIEEVEN,
diff --git a/target/arm/helper.c b/target/arm/helper.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -XXX,XX +XXX,XX @@ int sve_exception_el(CPUARMState *env, int el)
     return 0;
 }
 
-static uint32_t sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
+uint32_t aarch64_sve_zcr_get_valid_len(ARMCPU *cpu, uint32_t start_len)
 {
     uint32_t end_len;
 
@@ -XXX,XX +XXX,XX @@ uint32_t sve_zcr_len_for_el(CPUARMState *env, int el)
         zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[3]);
     }
 
-    return sve_zcr_get_valid_len(cpu, zcr_len);
+    return aarch64_sve_zcr_get_valid_len(cpu, zcr_len);
 }
 
 static void zcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
-- 
2.20.1

From: Richard Henderson <richard.henderson@linaro.org>

Mirror the behavour of /proc/sys/abi/sve_default_vector_length
under the real linux kernel.  We have no way of passing along
a real default across exec like the kernel can, but this is a
decent way of adjusting the startup vector length of a process.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/482
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20210723203344.968563-4-richard.henderson@linaro.org
[PMM: tweaked docs formatting, document -1 special-case,
 added fixup patch from RTH mentioning QEMU's maximum veclen.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 docs/system/arm/cpu-features.rst | 15 ++++++++
 target/arm/cpu.h                 |  5 +++
 target/arm/cpu.c                 | 14 ++++++--
 target/arm/cpu64.c               | 60 ++++++++++++++++++++++++++++++++
 4 files changed, 92 insertions(+), 2 deletions(-)

diff --git a/docs/system/arm/cpu-features.rst b/docs/system/arm/cpu-features.rst
index XXXXXXX..XXXXXXX 100644
--- a/docs/system/arm/cpu-features.rst
+++ b/docs/system/arm/cpu-features.rst
@@ -XXX,XX +XXX,XX @@ verbose command lines.  However, the recommended way to select vector
 lengths is to explicitly enable each desired length.  Therefore only
 example's (1), (4), and (6) exhibit recommended uses of the properties.
 
+SVE User-mode Default Vector Length Property
+--------------------------------------------
+
+For qemu-aarch64, the cpu property ``sve-default-vector-length=N`` is
+defined to mirror the Linux kernel parameter file
+``/proc/sys/abi/sve_default_vector_length``.  The default length, ``N``,
+is in units of bytes and must be between 16 and 8192.
+If not specified, the default vector length is 64.
+
+If the default length is larger than the maximum vector length enabled,
+the actual vector length will be reduced.  Note that the maximum vector
+length supported by QEMU is 256.
+
+If this property is set to ``-1`` then the default vector length
+is set to the maximum possible length.
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -XXX,XX +XXX,XX @@ struct ARMCPU {
     /* Used to set the maximum vector length the cpu will support.  */
     uint32_t sve_max_vq;
 
+#ifdef CONFIG_USER_ONLY
+    /* Used to set the default vector length at process start. */
+    uint32_t sve_default_vq;
+#endif
+
     /*
      * In sve_vq_map each set bit is a supported vector length of
      * (bit-number + 1) * 16 bytes, i.e. each bit number + 1 is the vector
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -XXX,XX +XXX,XX @@ static void arm_cpu_reset(DeviceState *dev)
         env->cp15.cpacr_el1 = deposit64(env->cp15.cpacr_el1, 16, 2, 3);
         /* with reasonable vector length */
         if (cpu_isar_feature(aa64_sve, cpu)) {
-            env->vfp.zcr_el[1] = MIN(cpu->sve_max_vq - 1, 3);
+            env->vfp.zcr_el[1] =
+                aarch64_sve_zcr_get_valid_len(cpu, cpu->sve_default_vq - 1);
         }
         /*
          * Enable TBI0 but not TBI1.
@@ -XXX,XX +XXX,XX @@ static void arm_cpu_initfn(Object *obj)
     QLIST_INIT(&cpu->pre_el_change_hooks);
     QLIST_INIT(&cpu->el_change_hooks);
 
-#ifndef CONFIG_USER_ONLY
+#ifdef CONFIG_USER_ONLY
+# ifdef TARGET_AARCH64
+    /*
+     * The linux kernel defaults to 512-bit vectors, when sve is supported.
+     * See documentation for /proc/sys/abi/sve_default_vector_length, and
+     * our corresponding sve-default-vector-length cpu property.
+     */
+    cpu->sve_default_vq = 4;
+# endif
+#else
     /* Our inbound IRQ and FIQ lines */
     if (kvm_enabled()) {
         /* VIRQ and VFIQ are unused with KVM but we add them to maintain
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index XXXXXXX..XXXXXXX 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -XXX,XX +XXX,XX @@ static void cpu_arm_set_sve(Object *obj, bool value, Error **errp)
     cpu->isar.id_aa64pfr0 = t;
 }
 
+#ifdef CONFIG_USER_ONLY
+/* Mirror linux /proc/sys/abi/sve_default_vector_length. */
+static void cpu_arm_set_sve_default_vec_len(Object *obj, Visitor *v,
+                                            const char *name, void *opaque,
+                                            Error **errp)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    int32_t default_len, default_vq, remainder;
+
+    if (!visit_type_int32(v, name, &default_len, errp)) {
+        return;
+    }
+
+    /* Undocumented, but the kernel allows -1 to indicate "maximum". */
+    if (default_len == -1) {
+        cpu->sve_default_vq = ARM_MAX_VQ;
+        return;
+    }
+
+    default_vq = default_len / 16;
+    remainder = default_len % 16;
+
+    /*
+     * Note that the 512 max comes from include/uapi/asm/sve_context.h
+     * and is the maximum architectural width of ZCR_ELx.LEN.
+     */
+    if (remainder || default_vq < 1 || default_vq > 512) {
+        error_setg(errp, "cannot set sve-default-vector-length");
+        if (remainder) {
+            error_append_hint(errp, "Vector length not a multiple of 16\n");
+        } else if (default_vq < 1) {
+            error_append_hint(errp, "Vector length smaller than 16\n");
+        } else {
+            error_append_hint(errp, "Vector length larger than %d\n",
+                              512 * 16);
+        }
+        return;
+    }
+
+    cpu->sve_default_vq = default_vq;
+}
+
+static void cpu_arm_get_sve_default_vec_len(Object *obj, Visitor *v,
+                                            const char *name, void *opaque,
+                                            Error **errp)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    int32_t value = cpu->sve_default_vq * 16;
+
+    visit_type_int32(v, name, &value, errp);
+}
+#endif
+
 void aarch64_add_sve_properties(Object *obj)
 {
     uint32_t vq;
@@ -XXX,XX +XXX,XX @@ void aarch64_add_sve_properties(Object *obj)
         object_property_add(obj, name, "bool", cpu_arm_get_sve_vq,
                             cpu_arm_set_sve_vq, NULL, NULL);
     }
+
+#ifdef CONFIG_USER_ONLY
+    /* Mirror linux /proc/sys/abi/sve_default_vector_length. */
+    object_property_add(obj, "sve-default-vector-length", "int32",
+                        cpu_arm_get_sve_default_vec_len,
+                        cpu_arm_set_sve_default_vec_len, NULL, NULL);
+#endif
 }
 
 void arm_cpu_pauth_finalize(ARMCPU *cpu, Error **errp)
-- 
2.20.1

From: Joel Stanley <joel@jms.id.au>

The macro used to calculate the maximum memory size of the MMIO region
had a mistake, causing all GPIO models to create a mapping of 0x9D8.
The intent was to have it be 0x9D8 - 0x800.

This extra size doesn't matter on ast2400 and ast2500, which have a 4KB
region set aside for the GPIO controller.

On the ast2600 the 3.3V and 1.8V GPIO controllers are 2KB apart, so the
regions would overlap. Worse was the 1.8V controller would map over the
top of the following peripheral, which happens to be the RTC.

The mmio region used by each device is a maximum of 2KB, so avoid the
calculations and hard code this as the maximum.

Fixes: 36d737ee82b2 ("hw/gpio: Add in AST2600 specific implementation")
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20210713065854.134634-2-joel@jms.id.au
[PMM: fix autocorrect error in commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/gpio/aspeed_gpio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/hw/gpio/aspeed_gpio.c b/hw/gpio/aspeed_gpio.c
index XXXXXXX..XXXXXXX 100644
--- a/hw/gpio/aspeed_gpio.c
+++ b/hw/gpio/aspeed_gpio.c
@@ -XXX,XX +XXX,XX @@
 #define GPIO_1_8V_MEM_SIZE            0x9D8
 #define GPIO_1_8V_REG_ARRAY_SIZE      ((GPIO_1_8V_MEM_SIZE - \
                                       GPIO_1_8V_REG_OFFSET) >> 2)
-#define GPIO_MAX_MEM_SIZE           MAX(GPIO_3_6V_MEM_SIZE, GPIO_1_8V_MEM_SIZE)
 
 static int aspeed_evaluate_irq(GPIOSets *regs, int gpio_prev_high, int gpio)
 {
@@ -XXX,XX +XXX,XX @@ static void aspeed_gpio_realize(DeviceState *dev, Error **errp)
     }
 
     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_gpio_ops, s,
-            TYPE_ASPEED_GPIO, GPIO_MAX_MEM_SIZE);
+            TYPE_ASPEED_GPIO, 0x800);
 
     sysbus_init_mmio(sbd, &s->iomem);
 }
-- 
2.20.1