On Wed, 20 Jun 2018 22:48:58 +0300 "Michael S. Tsirkin" <m...@redhat.com> wrote:
> On Wed, Jun 20, 2018 at 06:06:19PM +0200, Cornelia Huck wrote: > > In any case, I'm not sure anymore why we'd want the extra uuid. > > It's mostly so we can have e.g. multiple devices with same MAC > (which some people seem to want in order to then use > then with different containers). > > But it is also handy for when you assign a PF, since then you > can't set the MAC. > OK, so what about the following: - introduce a new feature bit, VIRTIO_NET_F_STANDBY_UUID that indicates that we have a new uuid field in the virtio-net config space - in QEMU, add a property for virtio-net that allows to specify a uuid, offer VIRTIO_NET_F_STANDBY_UUID if set - when configuring, set the property to the group UUID of the vfio-pci device - in the guest, use the uuid from the virtio-net device's config space if applicable; else, fall back to matching by MAC as done today That should work for all virtio transports.
