Re: [PATCH vhost v4 02/15] vdpa: Add VHOST_BACKEND_F_CHANGEABLE_VQ_ADDR_IN_SUSPEND flag

Jason Wang
2023-12-20T04:06:06Z

On Wed, Dec 20, 2023 at 11:46 AM Jason Wang <jasowang@redhat.com> wrote:
>
> On Wed, Dec 20, 2023 at 2:09 AM Dragos Tatulea <dtatulea@nvidia.com> wrote:
> >
> > The virtio spec doesn't allow changing virtqueue addresses after
> > DRIVER_OK. Some devices do support this operation when the device is
> > suspended. The VHOST_BACKEND_F_CHANGEABLE_VQ_ADDR_IN_SUSPEND flag
> > advertises this support as a backend features.
>
> There's an ongoing effort in virtio spec to introduce the suspend state.
>
> So I wonder if it's better to just allow such behaviour?

Actually I mean, allow drivers to modify the parameters during suspend
without a new feature.

Thanks

>
> Thanks
>
>