Re: [virtio-dev] Re: [PATCH V2 2/2] virtio-pci: add PASID configuration extended capability

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Jan 13, 2022 at 02:53:36PM +0000, Stefan Hajnoczi wrote:
> On Thu, Jan 13, 2022 at 05:45:11AM -0500, Michael S. Tsirkin wrote:
> > On Thu, Jan 13, 2022 at 10:32:11AM +0000, Stefan Hajnoczi wrote:
> > > > So my understanding is that instead of delaying the response to read
> > > > it's better to simply present the previous PASID value if there're any
> > > > pending transactions of previous PASID value. The driver can then
> > > > choose to poll or using timers etc.
> > 
> > Don't we limit these changes to before DRIVER_OK?
> > If we do then no previous transactions can exist.
> 
> Not sure if that's possible for the vDPA virtqueue assignment use case
> where one large VIRTIO device provides virtqueues for many smaller vDPA
> devices?
> 
> Stefan

Then I guess queue must be stopped?

-- 
MST