PCI: Add ACS quirk for Emulex NICs
As Skyhawk and BE3-R (both multi-function devices) don't advertise the PCI-ACS capability, the vfio driver places all the functions of these devices in a single IOMMU group. Attaching (via PCI-passthru) two different Skyhawk/BE3-R partitions (nPAR, Flex, etc. PFs) using vfio, to different guests doesn't work as vfio only allows functions in *different* IOMMU groups to be assigned to different guests. As peer-to-peer access between PFs in Skyhawk/BE3-R is not possible, we can treat them as "fully isolated" even though the device doesn't advertise ACS. Add a PCI quirk for Skyhawk and BE3-R chips to fix this problem. Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com> Signed-off-by: Sathya Perla <sathya.perla@emulex.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Alex Williamson <alex.williamson@redhat.com>
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