Re: [RFC] Upstreaming virtio-wayland (or an alternative)

[Gerd Hoffmann <kraxel@redhat.com>]

  Hi,

> > Because wayland benefits from allocation and sharing of
> > virtio-gpu buffers, a virtio-gpu combo device simplifies access to
> > those buffers, whereas the separate virtio devices as implemented in
> > crosvm requires bridging of resource handles (in guest kernel) and FDs
> > (in crosvm).
> 
> I must admit I'm not a huge fan of integrating a protocol-agnostic
> message passing interface (with FD-passing support) to virtio-gpu.
> Sounds like something that could be re-used without virtio-gpu being
> involved to me.

Agree.

> As for the resource bridging thing, that's more or less
> what I proposed with the generic interface to translate resource handles
> (what I called VFDs) to local FDs.

Yes, I think it makes sense to figure a sensible way to translate/manage
resource handles and have multiple virtio device work together.  What if
you want pass a handle to a virtio-fs file instead of a virtio-gpu
dma-buf between host and guest?

cheers,
  Gerd