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[PATCH] target/riscv/pmp: fix no pmp illegal intrs
From: |
Nikita Shubin |
Subject: |
[PATCH] target/riscv/pmp: fix no pmp illegal intrs |
Date: |
Tue, 14 Dec 2021 12:26:59 +0300 |
From: Nikita Shubin <n.shubin@yadro.com>
As per the privilege specification, any access from S/U mode should fail
if no pmp region is configured and pmp is present, othwerwise access
should succeed.
Fixes: d102f19a208 (target/riscv/pmp: Raise exception if no PMP entry is
configured)
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
---
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 ee7c24efe7..58d992e98a 100644
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -146,7 +146,8 @@ target_ulong helper_mret(CPURISCVState *env, target_ulong
cpu_pc_deb)
uint64_t mstatus = env->mstatus;
target_ulong prev_priv = get_field(mstatus, MSTATUS_MPP);
- if (!pmp_get_num_rules(env) && (prev_priv != PRV_M)) {
+ if (riscv_feature(env, RISCV_FEATURE_PMP) &&
+ !pmp_get_num_rules(env) && (prev_priv != PRV_M)) {
riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
}
--
2.31.1
- [PATCH] target/riscv/pmp: fix no pmp illegal intrs,
Nikita Shubin <=