Re: [Qemu-devel] [PATCH] virtio: Provide version-specific variants of virtio PCI devices

[Gerd Hoffmann]

  Hi,

> I don't know.  The `disable-modern` option already exists but I
> don't know who would want to use it.

Compat property for old (2.6 & older) machine types.

> > Right - maybe a flag to disable modern interface is enough.
> > We thus get two types:
> > - transitional (legacy)
> > - non-transitional (modern)
> > which matches spec nicely.
> 
> I would agree with the removal of virtio-*-0.9 only if we decide
> to drop support for disable-modern=true.

See above.  We can't drop disable-modern.

> If we still want to provide a legacy-only virtio device, it should be
> a separate device type.

I can't see a reason why we should provide legacy-only virtio devices.

cheers,
  Gerd