On Thu, Jul 12, 2018 at 04:33:04PM -0600, Alex Williamson wrote: > We expect to receive PFs with SR-IOV disabled, however some host > drivers leave SR-IOV enabled at unbind. This puts us in a state where > we can potentially assign both the PF and the VF, leading to both > functionality as well as security concerns due to lack of managing the > SR-IOV state as well as vendor dependent isolation from the PF to VF. > If we were to attempt to actively disable SR-IOV on driver probe, we > risk VF bound drivers blocking, potentially risking live lock > scenarios. Therefore simply refuse to bind to PFs with SR-IOV enabled > with a warning message indicating the issue. Users can resolve this > by re-binding to the host driver and disabling SR-IOV before > attempting to use the device with vfio-pci. > > Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Reviewed-by: Peter Xu <peterx@xxxxxxxxxx> -- Peter Xu
