Re: [PATCH v2 01/22] target/riscv: Fix trap cause for RV32 HS-mode CSR access from RV64 HS-mode

[Alistair Francis]

On Thu, Sep 2, 2021 at 9:36 PM Anup Patel <anup.pa...@wdc.com> wrote:
>
> We should be returning illegal instruction trap when RV64 HS-mode tries
> to access RV32 HS-mode CSR.
>
> Fixes: d6f20dacea51 ("target/riscv: Fix 32-bit HS mode access permissions")
> Signed-off-by: Anup Patel <anup.pa...@wdc.com>

Reviewed-by: Alistair Francis <alistair.fran...@wdc.com>

Alistair

> ---
>  target/riscv/csr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/riscv/csr.c b/target/riscv/csr.c
> index 50a2c3a3b4..1f13d1042d 100644
> --- a/target/riscv/csr.c
> +++ b/target/riscv/csr.c
> @@ -181,7 +181,7 @@ static RISCVException hmode(CPURISCVState *env, int csrno)
>  static RISCVException hmode32(CPURISCVState *env, int csrno)
>  {
>      if (!riscv_cpu_is_32bit(env)) {
> -        if (riscv_cpu_virt_enabled(env)) {
> +        if (!riscv_cpu_virt_enabled(env)) {
>              return RISCV_EXCP_ILLEGAL_INST;
>          } else {
>              return RISCV_EXCP_VIRT_INSTRUCTION_FAULT;
> --
> 2.25.1
>
>