diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-12-23 11:25:53 -0800 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2021-01-16 10:57:21 -0800 |
| commit | d102f19a2085ac931cb998e6153b73248cca49f1 (patch) | |
| tree | 27dd4ac7a7840c7a9d462869482c6f9ad76fce3f /target/riscv/op_helper.c | |
| parent | 1a475d39ef5467ca432c91beb67e9009304bb0bc (diff) | |
target/riscv/pmp: Raise exception if no PMP entry is configured
As per the privilege specification, any access from S/U mode should fail
if no pmp region is configured.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20201223192553.332508-1-atish.patra@wdc.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'target/riscv/op_helper.c')
| -rw-r--r-- | target/riscv/op_helper.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index d55def76cf..1eddcb94de 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -150,6 +150,11 @@ 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)) { + riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC()); + } + target_ulong prev_virt = get_field(env->mstatus, MSTATUS_MPV); mstatus = set_field(mstatus, MSTATUS_MIE, get_field(mstatus, MSTATUS_MPIE)); |