[ Upstream commit a18615b1cfc04f00548c60eb9a77e0ce56e848fd ]
Due to a hardware issue in A and B steppings of Intel IPU E2000, it expects wrong endianness in ATS invalidation message body. This problem can lead to outdated translations being returned as valid and finally cause system instability.
To prevent such issues, add quirk_intel_e2000_no_ats() to disable ATS for vulnerable IPU E2000 devices.
Link: https://lore.kernel.org/r/20230908143606.685930-3-bartosz.pawlowski@intel.co... Signed-off-by: Bartosz Pawlowski bartosz.pawlowski@intel.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Reviewed-by: Alexander Lobakin aleksander.lobakin@intel.com --- drivers/pci/quirks.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 20180894f82d..eb507751c115 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5212,6 +5212,25 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7312, quirk_amd_harvest_no_ats); /* AMD Navi14 dGPU */ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7341, quirk_amd_harvest_no_ats); + +/* + * Intel IPU E2000 revisions before C0 implement incorrect endianness + * in ATS Invalidate Request message body. Disable ATS for those devices. + */ +static void quirk_intel_e2000_no_ats(struct pci_dev *pdev) +{ + if (pdev->revision < 0x20) + quirk_no_ats(pdev); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1451, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1452, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1453, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1454, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1455, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1457, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1459, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x145a, quirk_intel_e2000_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x145c, quirk_intel_e2000_no_ats); #endif /* CONFIG_PCI_ATS */
/* Freescale PCIe doesn't support MSI in RC mode */