[libvirt] [Qemu-devel] [PATCH v2] vhost-user: define conventions for vhost-user backends

[Marc-André Lureau]

Hi

On Fri, Oct 5, 2018 at 7:59 PM Hoffmann, Gerd <kraxel at redhat.com> wrote:
>
>   Hi,
>
> > For example, "virgl" support may not be implemented. This
> > --print-capabilities is a simple way to check what the backend
> > implements.
>
> What is the expected behavior in case virgl is implemented by the
> backend, but not available (due to lack of 3d hardware in the host for
> example) ?

I would say either it fails at runtime, or the backend doesn't announce it.

Would you want something else?