[PATCH] PCI: Add ACS quirks for Broadcom BCM57412/57416 NICs
From: Michael Chan <michael.chan@broadcom.com>
Date: 2026-09-07 20:21:22
Also in:
linux-pci
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
From: Shantiprasad Shettar <redacted> The older Broadcom BCM57412/57416 NICs may be multi-function devices. While they don't advertise ACS capabilities, peer-to-peer transactions are not possible between the individual functions. So it is ok to treat them as fully isolated. Add ACS quirks for these 2 devices so the functions can be in independent IOMMU groups and attached individually to userspace applications using VFIO. Signed-off-by: Shantiprasad Shettar <redacted> Signed-off-by: Michael Chan <michael.chan@broadcom.com> --- drivers/pci/quirks.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index de9bbccda21f..191dbe87a09b 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c@@ -5182,7 +5182,9 @@ static const struct pci_dev_acs_enabled { { PCI_VENDOR_ID_AMPERE, 0xE00B, pci_quirk_xgene_acs }, { PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs }, /* Broadcom multi-function device */ + { PCI_VENDOR_ID_BROADCOM, 0x16D6, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0x16D7, pci_quirk_mf_endpoint_acs }, + { PCI_VENDOR_ID_BROADCOM, 0x16D8, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0x1750, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0x1751, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0x1752, pci_quirk_mf_endpoint_acs },
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2.51.0