Re: [Qemu-devel] [PATCH v2 21/22] s390x/tcg: Allow linux-user to use vector instructions

[Laurent Vivier]

Le 03/06/2019 à 11:06, David Hildenbrand a écrit :
> Once we unlock S390_FEAT_VECTOR for TCG, we want linux-user to be
> able to make use of it.
> 
> Reviewed-by: Richard Henderson <address@hidden>
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
>  target/s390x/cpu.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
> index b1df63d82c..6af1a1530f 100644
> --- a/target/s390x/cpu.c
> +++ b/target/s390x/cpu.c
> @@ -145,6 +145,9 @@ static void s390_cpu_full_reset(CPUState *s)
>  #if defined(CONFIG_USER_ONLY)
>      /* user mode should always be allowed to use the full FPU */
>      env->cregs[0] |= CR0_AFP;
> +    if (s390_has_feat(S390_FEAT_VECTOR)) {
> +        env->cregs[0] |= CR0_VECTOR;
> +    }
>  #endif
>  
>      /* architectured initial value for Breaking-Event-Address register */
> 

Do we need to add some hwcaps in linux-user/elfload.c (HWCAP_S390_VXRS,
HWCAP_S390_VXRS_EXT,...)?

Thanks,
Laurent