From: LIU Zhiwei <zhiwei_liu@c-sky.com> To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: guoren@linux.alibaba.com, bin.meng@windriver.com, richard.henderson@linaro.org, palmer@dabbelt.com, Alistair Francis <alistair.francis@wdc.com>, LIU Zhiwei <zhiwei_liu@c-sky.com> Subject: [PATCH v7 07/22] target/riscv: Extend pc for runtime pc write Date: Wed, 19 Jan 2022 13:18:09 +0800 [thread overview] Message-ID: <20220119051824.17494-8-zhiwei_liu@c-sky.com> (raw) In-Reply-To: <20220119051824.17494-1-zhiwei_liu@c-sky.com> In some cases, we must restore the guest PC to the address of the start of the TB, such as when the instruction counter hits zero. So extend pc register according to current xlen for these cases. Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> --- target/riscv/cpu.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 736cf1d4e7..eac5f7bf03 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -355,7 +355,12 @@ static void riscv_cpu_set_pc(CPUState *cs, vaddr value) { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = value; + + if (env->xl == MXL_RV32) { + env->pc = (int32_t)value; + } else { + env->pc = value; + } } static void riscv_cpu_synchronize_from_tb(CPUState *cs, @@ -363,7 +368,13 @@ static void riscv_cpu_synchronize_from_tb(CPUState *cs, { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = tb->pc; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + + if (xl == MXL_RV32) { + env->pc = (int32_t)tb->pc; + } else { + env->pc = tb->pc; + } } static bool riscv_cpu_has_work(CPUState *cs) @@ -384,7 +395,12 @@ static bool riscv_cpu_has_work(CPUState *cs) void restore_state_to_opc(CPURISCVState *env, TranslationBlock *tb, target_ulong *data) { - env->pc = data[0]; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + if (xl == MXL_RV32) { + env->pc = (int32_t)data[0]; + } else { + env->pc = data[0]; + } } static void riscv_cpu_reset(DeviceState *dev) -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: LIU Zhiwei <zhiwei_liu@c-sky.com> To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Alistair.Francis@wdc.com, palmer@dabbelt.com, bin.meng@windriver.com, richard.henderson@linaro.org, guoren@linux.alibaba.com, LIU Zhiwei <zhiwei_liu@c-sky.com>, Alistair Francis <alistair.francis@wdc.com> Subject: [PATCH v7 07/22] target/riscv: Extend pc for runtime pc write Date: Wed, 19 Jan 2022 13:18:09 +0800 [thread overview] Message-ID: <20220119051824.17494-8-zhiwei_liu@c-sky.com> (raw) In-Reply-To: <20220119051824.17494-1-zhiwei_liu@c-sky.com> In some cases, we must restore the guest PC to the address of the start of the TB, such as when the instruction counter hits zero. So extend pc register according to current xlen for these cases. Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> --- target/riscv/cpu.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 736cf1d4e7..eac5f7bf03 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -355,7 +355,12 @@ static void riscv_cpu_set_pc(CPUState *cs, vaddr value) { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = value; + + if (env->xl == MXL_RV32) { + env->pc = (int32_t)value; + } else { + env->pc = value; + } } static void riscv_cpu_synchronize_from_tb(CPUState *cs, @@ -363,7 +368,13 @@ static void riscv_cpu_synchronize_from_tb(CPUState *cs, { RISCVCPU *cpu = RISCV_CPU(cs); CPURISCVState *env = &cpu->env; - env->pc = tb->pc; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + + if (xl == MXL_RV32) { + env->pc = (int32_t)tb->pc; + } else { + env->pc = tb->pc; + } } static bool riscv_cpu_has_work(CPUState *cs) @@ -384,7 +395,12 @@ static bool riscv_cpu_has_work(CPUState *cs) void restore_state_to_opc(CPURISCVState *env, TranslationBlock *tb, target_ulong *data) { - env->pc = data[0]; + RISCVMXL xl = FIELD_EX32(tb->flags, TB_FLAGS, XL); + if (xl == MXL_RV32) { + env->pc = (int32_t)data[0]; + } else { + env->pc = data[0]; + } } static void riscv_cpu_reset(DeviceState *dev) -- 2.25.1
next prev parent reply other threads:[~2022-01-19 5:28 UTC|newest] Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-19 5:18 [PATCH v7 00/22] Support UXL filed in xstatus LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 01/22] target/riscv: Adjust pmpcfg access with mxl LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 02/22] target/riscv: Don't save pc when exception return LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 03/22] target/riscv: Sign extend link reg for jal and jalr LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 04/22] target/riscv: Sign extend pc for different XLEN LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 05/22] target/riscv: Create xl field in env LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 06/22] target/riscv: Ignore the pc bits above XLEN LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei [this message] 2022-01-19 5:18 ` [PATCH v7 07/22] target/riscv: Extend pc for runtime pc write LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 08/22] target/riscv: Use gdb xml according to max mxlen LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 09/22] target/riscv: Relax debug check for pm write LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 10/22] target/riscv: Adjust csr write mask with XLEN LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 11/22] target/riscv: Create current pm fields in env LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 12/22] target/riscv: Alloc tcg global for cur_pm[mask|base] LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 13/22] target/riscv: Calculate address according to XLEN LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 14/22] target/riscv: Split pm_enabled into mask and base LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 15/22] target/riscv: Split out the vill from vtype LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 16/22] target/riscv: Adjust vsetvl according to XLEN LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 17/22] target/riscv: Remove VILL field in VTYPE LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 18/22] target/riscv: Fix check range for first fault only LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 19/22] target/riscv: Adjust vector address with mask LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 20/22] target/riscv: Adjust scalar reg in vector with XLEN LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 21/22] target/riscv: Enable uxl field write LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei 2022-01-20 0:35 ` Alistair Francis 2022-01-20 0:35 ` Alistair Francis 2022-01-20 2:12 ` LIU Zhiwei 2022-01-20 2:12 ` LIU Zhiwei 2022-01-20 3:29 ` Alistair Francis 2022-01-20 3:29 ` Alistair Francis 2022-01-20 5:15 ` LIU Zhiwei 2022-01-20 5:15 ` LIU Zhiwei 2022-01-20 2:33 ` LIU Zhiwei 2022-01-20 2:33 ` LIU Zhiwei 2022-01-19 5:18 ` [PATCH v7 22/22] target/riscv: Relax UXL field for debugging LIU Zhiwei 2022-01-19 5:18 ` LIU Zhiwei
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