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[PATCH 1/2] target/riscv: Fix the mstatus.MPP value after executing MRET
From: |
Weiwei Li |
Subject: |
[PATCH 1/2] target/riscv: Fix the mstatus.MPP value after executing MRET |
Date: |
Thu, 30 Mar 2023 21:58:17 +0800 |
The MPP will be set to the least-privileged supported mode (U if
U-mode is implemented, else M).
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
---
target/riscv/op_helper.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index 84ee018f7d..991f06d98d 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -339,7 +339,8 @@ target_ulong helper_mret(CPURISCVState *env)
mstatus = set_field(mstatus, MSTATUS_MIE,
get_field(mstatus, MSTATUS_MPIE));
mstatus = set_field(mstatus, MSTATUS_MPIE, 1);
- mstatus = set_field(mstatus, MSTATUS_MPP, PRV_U);
+ mstatus = set_field(mstatus, MSTATUS_MPP,
+ riscv_has_ext(env, RVU) ? PRV_U : PRV_M);
mstatus = set_field(mstatus, MSTATUS_MPV, 0);
if ((env->priv_ver >= PRIV_VERSION_1_12_0) && (prev_priv != PRV_M)) {
mstatus = set_field(mstatus, MSTATUS_MPRV, 0);
--
2.25.1