PCI: Disable ATS for specific Intel IPU E2000 devices

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[ Upstream commit a18615b1cf ]

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outdated translations being returned as valid and finally cause system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.com
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Bartosz Pawlowski 2023-09-08 14:36:06 +00:00 • committed by Greg Kroah-Hartman

parent d3ca6149ee

commit 1edfc5bfde

1 changed files with 19 additions and 0 deletions

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drivers/pci/quirks.c

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