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Commit 6a3763d1 authored by Vasundhara Volam's avatar Vasundhara Volam Committed by Bjorn Helgaas
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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: default avatarVasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: default avatarSathya Perla <sathya.perla@emulex.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Acked-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent d84f3174

drivers/pci/quirks.c

+2 −0
Original line number Diff line number Diff line
@@ -3748,6 +3748,8 @@ static const struct pci_dev_acs_enabled { 
	{ PCI_VENDOR_ID_INTEL, 0x1551, pci_quirk_mf_endpoint_acs },

	{ PCI_VENDOR_ID_INTEL, 0x1558, pci_quirk_mf_endpoint_acs },

	{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },

	{ 0x19a2, 0x710, pci_quirk_mf_endpoint_acs }, /* Emulex BE3-R */

	{ 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */

	{ 0 }

};