diff options
| author | Damien Le Moal <[email protected]> | 2023-01-28 10:39:51 +0900 |
|---|---|---|
| committer | Bjorn Helgaas <[email protected]> | 2023-01-30 09:59:15 -0600 |
| commit | 63ba51db24ed1b8f8088a897290eb6c036c5435d (patch) | |
| tree | 21a91a0f51dedc6a42df6903fc333b7959f154f0 | |
| parent | 1b929c02afd37871d5afb9d498426f83432e71c2 (diff) | |
PCI: Avoid FLR for AMD FCH AHCI adapters
PCI passthrough to VMs does not work with AMD FCH AHCI adapters: the guest
OS fails to correctly probe devices attached to the controller due to FIS
communication failures:
ata4: softreset failed (1st FIS failed)
...
ata4.00: qc timeout after 5000 msecs (cmd 0xec)
ata4.00: failed to IDENTIFY (I/O error, err_mask=0x4)
Forcing the "bus" reset method before unbinding & binding the adapter to
the vfio-pci driver solves this issue, e.g.:
echo "bus" > /sys/bus/pci/devices/<ID>/reset_method
gives a working guest OS, indicating that the default FLR reset method
doesn't work correctly.
Apply quirk_no_flr() to AMD FCH AHCI devices to work around this issue.
Link: https://lore.kernel.org/r/[email protected]
Reported-by: Niklas Cassel <[email protected]>
Signed-off-by: Damien Le Moal <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Cc: [email protected]
| -rw-r--r-- | drivers/pci/quirks.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 285acc4aaccc..20ac67d59034 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5340,6 +5340,7 @@ static void quirk_no_flr(struct pci_dev *dev) DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1487, quirk_no_flr); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x148c, quirk_no_flr); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x149c, quirk_no_flr); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x7901, quirk_no_flr); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_no_flr); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_no_flr); |