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    SubjectRe: [PATCH] uio_pci_generic does not export memory resources
    On Fri, Jun 08, 2012 at 11:11:16AM -0600, Alex Williamson wrote:
    > On Fri, 2012-06-08 at 18:44 +0200, Hans J. Koch wrote:
    > > On Fri, Jun 08, 2012 at 06:16:18PM +0200, Andreas Hartmann wrote:
    > > > Hi Dominic,
    > > >
    > > > Dominic Eschweiler wrote:
    > > > > Am Freitag, den 08.06.2012, 08:16 -0600 schrieb Alex Williamson:
    > > > >> Yes, thanks Jan. This is exactly what VFIO does. VFIO provides
    > > > >> secure config space access, resource access, DMA mapping services, and
    > > > >> full interrupt support to userspace.
    > >
    > > VFIO is not a "better UIO". It *requires* an IOMMU. Dominic didn't say on
    > > what CPU he's working, so it's not clear if he can use VFIO at all.
    > >
    > > UIO is intended for general use with devices that have mappable registers
    > > and don't fit into any other subsystem. No more, no less.
    >
    > VFIO is a secure UIO.

    A secure UIO *for VFs*. I think that's why it's called VFIO :).
    Other stuff sometimes also works but no real guarantees, though
    VFIO tries to make sure you don't burn yourself too badly
    if it breaks.

    --
    MST


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