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[ Upstream commit afd306a65cedb9589564bdb23a0c368abc4215fd ]
The Broadcom BCM5750x NICs may be multi-function devices. They do not
advertise ACS capability. Peer-to-peer transactions are not possible
between the individual functions, so it is safe to treat them as fully
isolated.
Add an ACS quirk for these devices so the functions can be in independent
IOMMU groups and attached individually to userspace applications using
VFIO.
Link: https://lore.kernel.org/r/1654796507-28610-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
e7170b5a28