Re: [PATCH] xen: don't require virtio with grants for non-PV guests

[Juergen Gross <jgross@xxxxxxxx>]

On 15.06.22 15:43, Christoph Hellwig wrote:
> On Wed, Jun 15, 2022 at 02:53:54PM +0200, Juergen Gross wrote:
> > On 15.06.22 13:54, Christoph Hellwig wrote:
> > > On Wed, Jun 15, 2022 at 01:39:01PM +0200, Juergen Gross wrote:
> > > > No, it doesn't. I'm working on a qemu patch series enabling the qemu
> > > > based backends to support grants with virtio. The code is working fine
> > > > on x86, too (apart from the fact that the backends aren't ready yet).
> > > The code right now in mainline only ever sets the ops for DMA.  So
> > > I can't see how you could make it work.
> > Ah, you are right. I was using a guest with an older version of the series.
> > Sorry for the noise.
> No problem.  But whatever you end up using to enable the grant DMA
> ops n x86 should also require the platform access feature.  We already
> have that information so we can make use of it.
Yes, of course.


Juergen

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