| Message ID | 20221207090037.281452-2-bmeng@tinylab.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] target/riscv: Simplify helper_sret() a little bit | expand |
On Wed, Dec 7, 2022 at 7:11 PM Bin Meng <bmeng@tinylab.org> wrote: > > 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> Alistair > > --- > > target/riscv/op_helper.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c > index a047d38152..878bcb03b8 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); > > -- > 2.34.1 > >
On Wed, Dec 7, 2022 at 7:11 PM Bin Meng <bmeng@tinylab.org> wrote: > > Since priv spec v1.12, MRET and SRET now clear mstatus.MPRV when > leaving M-mode. > > Signed-off-by: Bin Meng <bmeng@tinylab.org> Thanks! Applied to riscv-to-apply.next Alistair > > --- > > target/riscv/op_helper.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c > index a047d38152..878bcb03b8 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); > > -- > 2.34.1 > >
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index a047d38152..878bcb03b8 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);
Since priv spec v1.12, MRET and SRET now clear mstatus.MPRV when leaving M-mode. Signed-off-by: Bin Meng <bmeng@tinylab.org> --- target/riscv/op_helper.c | 6 ++++++ 1 file changed, 6 insertions(+)