Re: [Xen-devel] [PATCH v11 04/23] x86: refactor psr: L3 CAT: implement main data structures, CPU init and free flows.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.05.17 at 10:44, <yi.y.sun@xxxxxxxxxxxxxxx> wrote:
> +static void cat_init_feature(const struct cpuid_leaf *regs,
> +                             struct feat_node *feat,
> +                             struct psr_socket_info *info,
> +                             enum psr_feat_type type)
> +{
> +    /* No valid value so do not enable feature. */
> +    if ( !regs->a || !regs->d )
> +        return;
> +
> +    feat->cbm_len = (regs->a & CAT_CBM_LEN_MASK) + 1;
> +    feat->cos_max = min(opt_cos_max, regs->d & CAT_COS_MAX_MASK);
> +
> +    switch ( type )
> +    {
> +    case PSR_SOCKET_L3_CAT:
> +        /* cos=0 is reserved as default cbm(all bits within cbm_len are 1). 
> */
> +        feat->cos_reg_val[0] = cat_default_val(feat->cbm_len);
> +
> +        break;
> +
> +    default:
> +        return;
> +    }
> +
> +    /* Add this feature into array. */
> +    info->features[type] = feat;
> +
> +    if ( !opt_cpu_info )
> +        return;
> +
> +    printk(XENLOG_INFO "%s CAT: enabled on socket %u, cos_max:%u, 
> cbm_len:%u\n",
> +           ((type == PSR_SOCKET_L3_CAT) ? "L3" : "L2"),
> +           cpu_to_socket(smp_processor_id()), feat->cos_max, feat->cbm_len);
> +}

Btw, I don't think there should be any mention of L2 CAT here just yet.

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel