Re: [RFC PATCH 0/7] vfio/pci: SR-IOV support

[Christoph Hellwig]

On Tue, Feb 04, 2020 at 04:05:34PM -0700, Alex Williamson wrote:
> We address this in a few ways in this series.  First, we can use a bus
> notifier and the driver_override facility to make sure VFs are bound
> to the vfio-pci driver by default.  This should eliminate the chance
> that a VF is accidentally bound and used by host drivers.  We don't
> however remove the ability for a host admin to change this override.

That is just such a bad idea.  Using VFs in the host is a perfectly
valid use case that you are breaking.