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.