[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v5 06/22] target/riscv: Extend pc for runtime pc write
From: |
LIU Zhiwei |
Subject: |
[PATCH v5 06/22] target/riscv: Extend pc for runtime pc write |
Date: |
Thu, 25 Nov 2021 15:39:35 +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 5c757ce33a..3e394d08e4 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -319,7 +319,12 @@ 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,
@@ -327,7 +332,13 @@ 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)
@@ -348,7 +359,12 @@ 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
- [PATCH v5 00/22] Support UXL filed in xstatus, LIU Zhiwei, 2021/11/25
- [PATCH v5 01/22] target/riscv: Adjust pmpcfg access with mxl, LIU Zhiwei, 2021/11/25
- [PATCH v5 02/22] target/riscv: Don't save pc when exception return, LIU Zhiwei, 2021/11/25
- [PATCH v5 03/22] target/riscv: Sign extend pc for different XLEN, LIU Zhiwei, 2021/11/25
- [PATCH v5 04/22] target/riscv: Create xl field in env, LIU Zhiwei, 2021/11/25
- [PATCH v5 05/22] target/riscv: Ignore the pc bits above XLEN, LIU Zhiwei, 2021/11/25
- [PATCH v5 06/22] target/riscv: Extend pc for runtime pc write,
LIU Zhiwei <=
- [PATCH v5 07/22] target/riscv: Use gdb xml according to max mxlen, LIU Zhiwei, 2021/11/25
- [PATCH v5 08/22] target/riscv: Relax debug check for pm write, LIU Zhiwei, 2021/11/25
- [PATCH v5 09/22] target/riscv: Adjust csr write mask with XLEN, LIU Zhiwei, 2021/11/25
- [PATCH v5 10/22] target/riscv: Create current pm fields in env, LIU Zhiwei, 2021/11/25
- [PATCH v5 11/22] target/riscv: Alloc tcg global for cur_pm[mask|base], LIU Zhiwei, 2021/11/25
- [PATCH v5 12/22] target/riscv: Calculate address according to XLEN, LIU Zhiwei, 2021/11/25
- [PATCH v5 13/22] target/riscv: Split pm_enabled into mask and base, LIU Zhiwei, 2021/11/25
- [PATCH v5 14/22] target/riscv: Split out the vill from vtype, LIU Zhiwei, 2021/11/25
- [PATCH v5 15/22] target/riscv: Fix RESERVED field length in VTYPE, LIU Zhiwei, 2021/11/25