Re: [Qemu-devel] [PATCH v6 18/18] intel_iommu: enable vfio devices

[Jason Wang <jasowang@redhat.com>]

On 2017年02月03日 16:22, Peter Xu wrote:
> This patch is based on Aviv Ben-David (<bd.aviv@gmail.com>)'s patch
> upstream:
>
>    "IOMMU: enable intel_iommu map and unmap notifiers"
>    https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html
>
> However I removed/fixed some content, and added my own codes.
>
> Instead of translate() every page for iotlb invalidations (which is
> slower), we walk the pages when needed and notify in a hook function.
>
> This patch enables vfio devices for VT-d emulation.
>
> And, since we already have vhost DMAR support via device-iotlb, a
> natural benefit that this patch brings is that vt-d enabled vhost can
> live even without ATS capability now. Though more tests are needed.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---

[...]

> -        vtd_page_walk(&ce, 0, ~0, vtd_replay_hook, (void *)n);
> +        vtd_page_walk(&ce, 0, ~0, vtd_replay_hook, (void *)n, false);

Should be ~0ULL too, with this fixed.

Reviewed-by: Jason Wang <jasowang@redhat.com>