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[PATCH v6 07/22] target/riscv: Extend pc for runtime pc write
From: |
LIU Zhiwei |
Subject: |
[PATCH v6 07/22] target/riscv: Extend pc for runtime pc write |
Date: |
Thu, 13 Jan 2022 19:39:49 +0800 |
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 54c1cf8ec5..db16aaf7c9 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -341,7 +341,12 @@ 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,
@@ -349,7 +354,13 @@ 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)
@@ -370,7 +381,12 @@ 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
- Re: [PATCH v6 01/22] target/riscv: Adjust pmpcfg access with mxl, (continued)
- [PATCH v6 06/22] target/riscv: Ignore the pc bits above XLEN, LIU Zhiwei, 2022/01/13
- [PATCH v6 07/22] target/riscv: Extend pc for runtime pc write,
LIU Zhiwei <=
- [PATCH v6 08/22] target/riscv: Use gdb xml according to max mxlen, LIU Zhiwei, 2022/01/13
- [PATCH v6 09/22] target/riscv: Relax debug check for pm write, LIU Zhiwei, 2022/01/13
- [PATCH v6 10/22] target/riscv: Adjust csr write mask with XLEN, LIU Zhiwei, 2022/01/13
- [PATCH v6 11/22] target/riscv: Create current pm fields in env, LIU Zhiwei, 2022/01/13
- [PATCH v6 12/22] target/riscv: Alloc tcg global for cur_pm[mask|base], LIU Zhiwei, 2022/01/13
- [PATCH v6 13/22] target/riscv: Calculate address according to XLEN, LIU Zhiwei, 2022/01/13
- [PATCH v6 14/22] target/riscv: Split pm_enabled into mask and base, LIU Zhiwei, 2022/01/13
- [PATCH v6 15/22] target/riscv: Split out the vill from vtype, LIU Zhiwei, 2022/01/13
- [PATCH v6 16/22] target/riscv: Adjust vsetvl according to XLEN, LIU Zhiwei, 2022/01/13
- [PATCH v6 17/22] target/riscv: Remove VILL field in VTYPE, LIU Zhiwei, 2022/01/13