Re: [EXTERNAL] Re: [PATCH v2 0/2] vhost-vdpa: Add support for NO-IOMMU mode

Michael S. Tsirkin
2024-10-20T00:16:53Z

On Wed, Oct 16, 2024 at 11:16:08PM -0700, Christoph Hellwig wrote:
> On Wed, Oct 16, 2024 at 01:41:51PM -0400, Michael S. Tsirkin wrote:
> > It's basically because vfio does, so we have to follow suit.
>
> That's a very bold argument, especially without any rationale of
>
> a) why you need to match the feature set

Because people want to move from some vendor specific solution with vfio
to a standard vdpa compatible one with vdpa.

We could just block them since we don't support tainted kernels anyway,
but it's a step in the right direction since it allows moving to
virtio, and the kernel is tained so no big support costs (although
qe costs do exist, as with any code).

> b) how even adding it to vfio was agood idea

That ship has sailed.

--
MST