On Thu, Jul 15, 2021 at 09:48:13AM -0300, Jason Gunthorpe wrote: > On Thu, Jul 15, 2021 at 06:49:54AM +0000, Tian, Kevin wrote: > > > No. You are right on this case. I don't think there is a way to > > differentiate one mdev from the other if they come from the > > same parent and attached by the same guest process. In this > > case the fault could be reported on either mdev (e.g. the first > > matching one) to get it fixed in the guest. > > If the IOMMU can't distinguish the two mdevs they are not isolated > and would have to share a group. Since group sharing is not supported > today this seems like a non-issue Does this mean we have to prevent 2 mdev's from same pdev being assigned to the same guest?
