Re: [Xen-devel] [PATCH v6 06/14] x86: expose CBM length and COS number information

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.04.15 at 11:55, <chao.p.peng@xxxxxxxxxxxxxxx> wrote:
> --- a/xen/arch/x86/sysctl.c
> +++ b/xen/arch/x86/sysctl.c
> @@ -171,6 +171,24 @@ long arch_do_sysctl(
>  
>          break;
>  
> +    case XEN_SYSCTL_psr_cat_op:
> +        switch ( sysctl->u.psr_cat_op.cmd )
> +        {
> +        case XEN_SYSCTL_PSR_CAT_get_l3_info:
> +            ret = psr_get_cat_l3_info(sysctl->u.psr_cat_op.target,
> +                                      
> &sysctl->u.psr_cat_op.u.l3_info.cbm_len,
> +                                      
> &sysctl->u.psr_cat_op.u.l3_info.cos_max);
> +
> +            if ( !ret && __copy_to_guest(u_sysctl, sysctl, 1) )

Can't this be __copy_field_to_guest() for just the u.psr_cat_op part?

Jan


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