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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 1/8] target/riscv: Mark privilege level 2 as reserved X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Signed-off-by: Alistair Francis --- 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 7180fccf54..945aa8dbb8 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -383,7 +383,7 @@ /* Privilege modes */ #define PRV_U 0 #define PRV_S 1 -#define PRV_H 2 +#define PRV_H 2 /* Reserved */ #define PRV_M 3 =20 /* RV32 satp CSR field masks */ --=20 2.21.0 From nobody Mon May 6 18:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 2/8] target/riscv: Trigger interrupt on MIP update asynchronously X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) The requirement of holding the iothread_mutex is burdersome when swapping the background and foreground registers in the Hypervisor extension. To avoid the requrirement let's set the interrupt asynchronously. Signed-off-by: Alistair Francis --- target/riscv/cpu_helper.c | 33 +++++++++++++++++++++++++++------ target/riscv/csr.c | 2 -- 2 files changed, 27 insertions(+), 8 deletions(-) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index b17f169681..582d58aad9 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -82,10 +82,31 @@ int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t = interrupts) } } =20 -/* iothread_mutex must be held */ +struct CpuAsyncInfo { + uint32_t new_mip; +}; + +static void riscv_cpu_update_mip_irqs_async(CPUState *target_cpu_state, + run_on_cpu_data data) +{ + CPURISCVState *env =3D &RISCV_CPU(target_cpu_state)->env; + RISCVCPU *cpu =3D riscv_env_get_cpu(env); + struct CpuAsyncInfo *info =3D (struct CpuAsyncInfo *) data.host_ptr; + + if (info->new_mip) { + cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); + } else { + cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); + } + + g_free(info); +} + uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value) { CPURISCVState *env =3D &cpu->env; + CPUState *cs =3D CPU(cpu); + struct CpuAsyncInfo *info; uint32_t old, new, cmp =3D atomic_read(&env->mip); =20 do { @@ -94,11 +115,11 @@ uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t = mask, uint32_t value) cmp =3D atomic_cmpxchg(&env->mip, old, new); } while (old !=3D cmp); =20 - if (new) { - cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); - } else { - cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_HARD); - } + info =3D g_new(struct CpuAsyncInfo, 1); + info->new_mip =3D new; + + async_run_on_cpu(cs, riscv_cpu_update_mip_irqs_async, + RUN_ON_CPU_HOST_PTR(info)); =20 return old; } diff --git a/target/riscv/csr.c b/target/riscv/csr.c index e1d91b6c60..f9d8d150e0 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -555,9 +555,7 @@ static int rmw_mip(CPURISCVState *env, int csrno, targe= t_ulong *ret_value, uint32_t old_mip; =20 if (mask) { - qemu_mutex_lock_iothread(); old_mip =3D riscv_cpu_update_mip(cpu, mask, (new_value & mask)); - qemu_mutex_unlock_iothread(); } else { old_mip =3D atomic_read(&env->mip); 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 3/8] target/riscv: Improve the scause logic X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) No functional change, just making the code easier to read. Signed-off-by: Alistair Francis --- target/riscv/cpu_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 582d58aad9..e7d9dd95cc 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -525,7 +525,7 @@ void riscv_cpu_do_interrupt(CPUState *cs) s =3D set_field(s, MSTATUS_SPP, env->priv); s =3D set_field(s, MSTATUS_SIE, 0); env->mstatus =3D s; - env->scause =3D cause | ~(((target_ulong)-1) >> async); + env->scause =3D cause | ((target_ulong)async << (TARGET_LONG_BITS = - 1)); env->sepc =3D env->pc; env->sbadaddr =3D tval; env->pc =3D (env->stvec >> 2 << 2) + --=20 2.21.0 From nobody Mon May 6 18:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 4/8] target/riscv: Add the MPV and MTL mstatus bits X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Signed-off-by: Alistair Francis --- target/riscv/cpu_bits.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 945aa8dbb8..fe7164754b 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -316,14 +316,11 @@ /* mstatus CSR bits */ #define MSTATUS_UIE 0x00000001 #define MSTATUS_SIE 0x00000002 -#define MSTATUS_HIE 0x00000004 #define MSTATUS_MIE 0x00000008 #define MSTATUS_UPIE 0x00000010 #define MSTATUS_SPIE 0x00000020 -#define MSTATUS_HPIE 0x00000040 #define MSTATUS_MPIE 0x00000080 #define MSTATUS_SPP 0x00000100 -#define MSTATUS_HPP 0x00000600 #define MSTATUS_MPP 0x00001800 #define MSTATUS_FS 0x00006000 #define MSTATUS_XS 0x00018000 @@ -335,6 +332,8 @@ #define MSTATUS_TVM 0x00100000 /* since: priv-1.10 */ #define MSTATUS_TW 0x20000000 /* since: priv-1.10 */ #define MSTATUS_TSR 0x40000000 /* since: priv-1.10 */ +#define MSTATUS_MTL 0x4000000000ULL +#define MSTATUS_MPV 0x8000000000ULL =20 #define MSTATUS64_UXL 0x0000000300000000ULL #define MSTATUS64_SXL 0x0000000C00000000ULL --=20 2.21.0 From nobody Mon May 6 18:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 5/8] target/riscv: Allow setting mstatus virtulisation bits X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Signed-off-by: Alistair Francis --- target/riscv/csr.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index f9d8d150e0..e6d68a9956 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -290,7 +290,6 @@ static int write_mstatus(CPURISCVState *env, int csrno,= target_ulong val) { target_ulong mstatus =3D env->mstatus; target_ulong mask =3D 0; - target_ulong mpp =3D get_field(val, MSTATUS_MPP); =20 /* flush tlb on mstatus fields that affect VM */ if (env->priv_ver <=3D PRIV_VERSION_1_09_1) { @@ -305,7 +304,7 @@ static int write_mstatus(CPURISCVState *env, int csrno,= target_ulong val) MSTATUS_VM : 0); } if (env->priv_ver >=3D PRIV_VERSION_1_10_0) { - if ((val ^ mstatus) & (MSTATUS_MXR | MSTATUS_MPP | + if ((val ^ mstatus) & (MSTATUS_MXR | MSTATUS_MPP | MSTATUS_MPV | MSTATUS_MPRV | MSTATUS_SUM)) { tlb_flush(CPU(riscv_env_get_cpu(env))); } @@ -313,13 +312,13 @@ static int write_mstatus(CPURISCVState *env, int csrn= o, target_ulong val) MSTATUS_SPP | MSTATUS_FS | MSTATUS_MPRV | MSTATUS_SUM | MSTATUS_MPP | MSTATUS_MXR | MSTATUS_TVM | MSTATUS_TSR | MSTATUS_TW; - } - - /* silenty discard mstatus.mpp writes for unsupported modes */ - if (mpp =3D=3D PRV_H || - (!riscv_has_ext(env, RVS) && mpp =3D=3D PRV_S) || - (!riscv_has_ext(env, RVU) && mpp =3D=3D PRV_U)) { - mask &=3D ~MSTATUS_MPP; +#if defined(TARGET_RISCV64) + /* + * RV32: MPV and MTL are not in mstatus. The current plan is to + * add them to mstatush. For now, we just don't support it. + */ + mask |=3D MSTATUS_MPP | MSTATUS_MPV; +#endif } =20 mstatus =3D (mstatus & ~mask) | (val & mask); --=20 2.21.0 From nobody Mon May 6 18:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=wdc.com ARC-Seal: i=1; a=rsa-sha256; t=1555727504; cv=none; d=zoho.com; s=zohoarc; b=m/iG13o4l/R/Ypf9CdAjsQ+BuALD2/DtFdDs9ip+/22n4Q0wW4nalvajzvd37/BvYp+PZh2NhIjEtI/2R57TRtnnYUZI+A5vrWRLEVkU6xdMzS83ktjPWROtmwx5DDJ1Jpgo6JCtAvuXUYzbLVAbBl3b/bd8SMxtjH8crUZBz/c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 6/8] target/riscv: Add Hypervisor CSR macros X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Add the 1.10.1 Hypervisor CSRs and remove the 1.9.1 spec versions. Signed-off-by: Alistair Francis --- target/riscv/cpu_bits.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index fe7164754b..52c2169977 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -202,6 +202,12 @@ #define CSR_DPC 0x7b1 #define CSR_DSCRATCH 0x7b2 =20 +/* Hpervisor CSRs */ +#define CSR_HSTATUS 0xa00 +#define CSR_HEDELEG 0xa02 +#define CSR_HIDELEG 0xa03 +#define CSR_HGATP 0xa80 + /* Performance Counters */ #define CSR_MHPMCOUNTER3 0xb03 #define CSR_MHPMCOUNTER4 0xb04 @@ -292,9 +298,6 @@ #define CSR_MHPMCOUNTER31H 0xb9f =20 /* Legacy Hypervisor Trap Setup (priv v1.9.1) */ -#define CSR_HSTATUS 0x200 -#define CSR_HEDELEG 0x202 -#define CSR_HIDELEG 0x203 #define CSR_HIE 0x204 #define CSR_HTVEC 0x205 =20 --=20 2.21.0 From nobody Mon May 6 18:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 7/8] target/riscv: Add the HSTATUS register masks X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Signed-off-by: Alistair Francis --- target/riscv/cpu_bits.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 52c2169977..a179137bc1 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -382,6 +382,24 @@ #define SSTATUS_SD SSTATUS64_SD #endif =20 +/* hstatus CSR bits */ +#define HSTATUS_SPRV 0x00000001 +#define HSTATUS_STL 0x00000040 +#define HSTATUS_SPV 0x00000080 +#define HSTATUS_SP2P 0x00000100 +#define HSTATUS_SP2V 0x00000200 +#define HSTATUS_VTVM 0x00100000 +#define HSTATUS_VTSR 0x00400000 + +#define HSTATUS32_WPRI 0xFF8FF87E +#define HSTATUS64_WPRI 0xFFFFFFFFFF8FF87EULL + +#if defined(TARGET_RISCV32) +#define HSTATUS_WPRI HSTATUS32_WPRI +#elif defined(TARGET_RISCV64) +#define HSTATUS_WPRI HSTATUS64_WPRI +#endif + /* Privilege modes */ #define PRV_U 0 #define PRV_S 1 --=20 2.21.0 From nobody Mon May 6 18:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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X-Received-From: 216.71.153.144 Subject: [Qemu-devel] [PATCH v1 8/8] target/riscv: Add the HGATP register masks X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , "palmer@sifive.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Signed-off-by: Alistair Francis --- target/riscv/cpu_bits.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index a179137bc1..dc9d53d4be 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -208,6 +208,17 @@ #define CSR_HIDELEG 0xa03 #define CSR_HGATP 0xa80 =20 +#if defined(TARGET_RISCV32) +#define HGATP_MODE SATP32_MODE +#define HGATP_ASID SATP32_ASID +#define HGATP_PPN SATP32_PPN +#endif +#if defined(TARGET_RISCV64) +#define HGATP_MODE SATP64_MODE +#define HGATP_ASID SATP64_ASID +#define HGATP_PPN SATP64_PPN +#endif + /* Performance Counters */ #define CSR_MHPMCOUNTER3 0xb03 #define CSR_MHPMCOUNTER4 0xb04 --=20 2.21.0