Re: [PATCH vfio 11/11] vfio/virtio: Introduce a vfio driver over virtio devices

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On Thu, Sep 21, 2023 at 05:01:21PM -0300, Jason Gunthorpe wrote:
> On Thu, Sep 21, 2023 at 01:58:32PM -0600, Alex Williamson wrote:
> > > +static const struct pci_device_id virtiovf_pci_table[] = {
> > 
> > libvirt will blindly use this driver for all devices matching this as
> > we've discussed how it should make use of modules.alias.  I don't think
> > this driver should be squatting on devices where it doesn't add value
> > and it's not clear whether this is adding or subtracting value in all
> > cases for the one NIC that it modifies.  How should libvirt choose when
> > and where to use this driver?  What regressions are we going to see
> > with VMs that previously saw "modern" virtio-net devices and now see a
> > legacy compatible device?  Thanks,
> Maybe this approach needs to use a subsystem ID match?
> Jason

Maybe make users load it manually?

Please don't bind to virtio by default, you will break
all guests.


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