Re: [RFC 0/4] Enable virtio-fs on s390x

[Halil Pasic]

On Thu, 25 Jun 2020 12:17:55 +0200
Cornelia Huck <cohuck@redhat.com> wrote:

> On Thu, 25 Jun 2020 12:04:26 +0200
> Marc Hartmayer <mhartmay@linux.ibm.com> wrote:
> 
> > This RFC is about enabling virtio-fs on s390x. For that we need
> >  + some shim code (first patch), and we need
> >  + libvhost-user to deal with virtio endiannes as mandated by the spec.
> >  
> > The second part is trickier, because unlike QEMU we are not certain
> > about the guest's native endianness, which is needed to handle the
> > legacy-interface appropriately. In fact, this is the reason why just
> > RFC.
> > 
> > One of the open questions is whether to build separate versions, one
> > for guest little endian and one for guest big endian, or do we want
> > something like a command line option? (Digression on the libvirt
> > modeling)
> > 
> > A third option would be to refuse legacy altogether.
> 
> The third option looks the most tempting to me. It is a new device, so
> I don't think there's much of a case to be made for pre-virtio-1
> support?
> 
> 

Yes, virtio-fs is a new device, but libvhost-user is not specific to
virtio-fs.

Regards,
Halil