Re: [Xen-devel] [PATCHv1] xen/evtchn: add IOCTL_EVTCHN_RESTRICT

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.07.16 at 16:57, <david.vrabel@xxxxxxxxxx> wrote:
> @@ -553,6 +570,27 @@ static long evtchn_ioctl(struct file *file,
>               break;
>       }
>  
> +     case IOCTL_EVTCHN_RESTRICT_DOMID: {
> +             struct ioctl_evtchn_restrict_domid ierd;
> +
> +             rc = -EACCES;
> +             if (u->restrict_domid != UNRESTRICTED_DOMID)
> +                     break;
> +
> +             rc = -EFAULT;
> +             if (copy_from_user(&ierd, uarg, sizeof(ierd)))
> +                 break;
> +
> +             rc = -EINVAL;
> +             if (ierd.domid == 0 || ierd.domid >= DOMID_FIRST_RESERVED)
> +                     break;

Any reason you special case Dom0 here, but not the conceptually
more general hardware and/or control domain?

Jan


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