Re: [PATCH] linux-user/riscv: Add Zicboz block size to hwprobe

[Daniel Henrique Barboza]

On 11/10/23 14:37, Palmer Dabbelt wrote:
> Support for probing the Zicboz block size landed in Linux 6.6, which was
> released a few weeks ago.  This provides the user-configured block size
> when Zicboz is enabled.
>
> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
> ---

Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>


>   linux-user/syscall.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 65ac3ac796..7caacf43d6 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -8808,6 +8808,8 @@ static int do_getdents64(abi_long dirfd, abi_long arg2, 
> abi_long count)
>   #define     RISCV_HWPROBE_MISALIGNED_UNSUPPORTED (4 << 0)
>   #define     RISCV_HWPROBE_MISALIGNED_MASK        (7 << 0)
>   
> +#define RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE 6
> +
>   struct riscv_hwprobe {
>       abi_llong  key;
>       abi_ullong value;
> @@ -8860,6 +8862,10 @@ static void risc_hwprobe_fill_pairs(CPURISCVState *env,
>           case RISCV_HWPROBE_KEY_CPUPERF_0:
>               __put_user(RISCV_HWPROBE_MISALIGNED_FAST, &pair->value);
>               break;
> +        case RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE:
> +            value = cfg->ext_zicboz ? cfg->cboz_blocksize : 0;
> +            __put_user(value, &pair->value);
> +            break;
>           default:
>               __put_user(-1, &pair->key);
>               break;