Re: [PATCH v2 2/5] target/riscv: Update cur_pmmask/base when xl changes

[LIU Zhiwei <zhiwei_liu@linux.alibaba.com>]

On 2023/3/29 11:23, Weiwei Li wrote:
> write_mstatus() can only change current xl when in debug mode.
> And we need update cur_pmmask/base in this case.
>
> Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
> Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
> ---
>   target/riscv/csr.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/csr.c b/target/riscv/csr.c
> index d522efc0b6..43b9ad4500 100644
> --- a/target/riscv/csr.c
> +++ b/target/riscv/csr.c
> @@ -1277,8 +1277,15 @@ static RISCVException write_mstatus(CPURISCVState *env, int csrno,
>           mstatus = set_field(mstatus, MSTATUS64_SXL, xl);
>       }
>       env->mstatus = mstatus;
> -    env->xl = cpu_recompute_xl(env);
>   
> +    /*
> +     * Except in debug mode, UXL/SXL can only be modified by higher
> +     * privilege mode. So xl will not be changed in normal mode.
> +     */
> +    if (env->debugger) {
> +        env->xl = cpu_recompute_xl(env);
> +        riscv_cpu_update_mask(env);
> +    }
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>

Zhiwei
>       return RISCV_EXCP_NONE;
>   }
>