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target/riscv: Simplify helper_sret() a little bit 

There are 2 paths in helper_sret() and the same mstatus update codes
are replicated. Extract the common parts to simplify it a little bit.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221207090037.281452-1-bmeng@tinylab.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Bin Meng 2022-12-07 17:00:36 +08:00 committed by Alistair Francis
parent ec2918b467
commit 2bfec53b4c
1 changed files with 6 additions and 14 deletions
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20
target/riscv/op_helper.c
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@ -149,21 +149,21 @@ target_ulong helper_sret(CPURISCVState *env)
}
mstatus = env->mstatus;
prev_priv = get_field(mstatus, MSTATUS_SPP);
mstatus = set_field(mstatus, MSTATUS_SIE,
get_field(mstatus, MSTATUS_SPIE));
mstatus = set_field(mstatus, MSTATUS_SPIE, 1);
mstatus = set_field(mstatus, MSTATUS_SPP, PRV_U);
env->mstatus = mstatus;
if (riscv_has_ext(env, RVH) && !riscv_cpu_virt_enabled(env)) {
/* We support Hypervisor extensions and virtulisation is disabled */
target_ulong hstatus = env->hstatus;
prev_priv = get_field(mstatus, MSTATUS_SPP);
prev_virt = get_field(hstatus, HSTATUS_SPV);
hstatus = set_field(hstatus, HSTATUS_SPV, 0);
mstatus = set_field(mstatus, MSTATUS_SPP, 0);
mstatus = set_field(mstatus, SSTATUS_SIE,
get_field(mstatus, SSTATUS_SPIE));
mstatus = set_field(mstatus, SSTATUS_SPIE, 1);
env->mstatus = mstatus;
env->hstatus = hstatus;
if (prev_virt) {
@ -171,14 +171,6 @@ target_ulong helper_sret(CPURISCVState *env)
}
riscv_cpu_set_virt_enabled(env, prev_virt);
} else {
prev_priv = get_field(mstatus, MSTATUS_SPP);
mstatus = set_field(mstatus, MSTATUS_SIE,
get_field(mstatus, MSTATUS_SPIE));
mstatus = set_field(mstatus, MSTATUS_SPIE, 1);
mstatus = set_field(mstatus, MSTATUS_SPP, PRV_U);
env->mstatus = mstatus;
}
riscv_cpu_set_mode(env, prev_priv);