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| author | Bin Meng <bmeng@tinylab.org> | 2022-12-07 17:00:37 +0800 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2023-01-06 10:42:55 +1000 |
| commit | 0ff430a5b10db884d6dd6cde930b4e73283b7507 (patch) | |
| tree | 65ae7573480dd1c3171cb445b7cdcddf31ae92fe /target | |
| parent | 2bfec53b4c7d5e5ddd08ea6ef77257cba612700d (diff) | |
| download | qemu-0ff430a5b10db884d6dd6cde930b4e73283b7507.zip qemu-0ff430a5b10db884d6dd6cde930b4e73283b7507.tar.gz qemu-0ff430a5b10db884d6dd6cde930b4e73283b7507.tar.bz2 | |
target/riscv: Clear mstatus.MPRV when leaving M-mode for priv spec 1.12+
Since priv spec v1.12, MRET and SRET now clear mstatus.MPRV when
leaving M-mode.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221207090037.281452-2-bmeng@tinylab.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/riscv/op_helper.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index a047d38..878bcb0 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -154,6 +154,9 @@ target_ulong helper_sret(CPURISCVState *env) get_field(mstatus, MSTATUS_SPIE)); mstatus = set_field(mstatus, MSTATUS_SPIE, 1); mstatus = set_field(mstatus, MSTATUS_SPP, PRV_U); + if (env->priv_ver >= PRIV_VERSION_1_12_0) { + mstatus = set_field(mstatus, MSTATUS_MPRV, 0); + } env->mstatus = mstatus; if (riscv_has_ext(env, RVH) && !riscv_cpu_virt_enabled(env)) { @@ -203,6 +206,9 @@ target_ulong helper_mret(CPURISCVState *env) mstatus = set_field(mstatus, MSTATUS_MPIE, 1); mstatus = set_field(mstatus, MSTATUS_MPP, PRV_U); 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); + } env->mstatus = mstatus; riscv_cpu_set_mode(env, prev_priv); |