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    SubjectRe: [PATCH v4 29/32] vfio-pci/zdev: add DTSM to clp group capability
    On Tue, Mar 15, 2022 at 10:39:18AM -0400, Matthew Rosato wrote:
    > > That is something that should be modeled as a nested iommu domain.
    > >
    > > Querying the formats and any control logic for this should be on the
    > > iommu side not built into VFIO.
    >
    > I agree that the DTSM is really controlled by what the IOMMU domain can
    > support (e.g. what guest table formats it can actually operate on) and so
    > the DTSM value should come from there vs out of KVM; but is there harm in
    > including the query response data here along with the rest of the response
    > information for 'query this zPCI group'?

    'Harm'? No, but I think it is wrong encapsulation and layering.

    Jason

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