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    SubjectRe: [RFC v2] /dev/iommu uAPI proposal
    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

    Jason

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