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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2025-05-20 15:58:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-27 11:11:21 +0100 |
| commit | fb5873b779dd5858123c19bbd6959566771e2e83 (patch) | |
| tree | 7020bad831fc6bdd2da73b3dffa486eb25d19245 /drivers/video | |
| parent | 81c64c2f84ab581d1c45dbbbca941c13128faee6 (diff) | |
| download | linux-fb5873b779dd5858123c19bbd6959566771e2e83.tar.gz linux-fb5873b779dd5858123c19bbd6959566771e2e83.tar.bz2 linux-fb5873b779dd5858123c19bbd6959566771e2e83.zip | |
iommu/vt-d: Restore context entry setup order for aliased devices
commit 320302baed05c6456164652541f23d2a96522c06 upstream.
Commit 2031c469f816 ("iommu/vt-d: Add support for static identity domain")
changed the context entry setup during domain attachment from a
set-and-check policy to a clear-and-reset approach. This inadvertently
introduced a regression affecting PCI aliased devices behind PCIe-to-PCI
bridges.
Specifically, keyboard and touchpad stopped working on several Apple
Macbooks with below messages:
kernel: platform pxa2xx-spi.3: Adding to iommu group 20
kernel: input: Apple SPI Keyboard as
/devices/pci0000:00/0000:00:1e.3/pxa2xx-spi.3/spi_master/spi2/spi-APP000D:00/input/input0
kernel: DMAR: DRHD: handling fault status reg 3
kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr
0xffffa000 [fault reason 0x06] PTE Read access is not set
kernel: DMAR: DRHD: handling fault status reg 3
kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr
0xffffa000 [fault reason 0x06] PTE Read access is not set
kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00
kernel: DMAR: DRHD: handling fault status reg 3
kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr
0xffffa000 [fault reason 0x06] PTE Read access is not set
kernel: DMAR: DRHD: handling fault status reg 3
kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00
Fix this by restoring the previous context setup order.
Fixes: 2031c469f816 ("iommu/vt-d: Add support for static identity domain")
Closes: https://lore.kernel.org/all/4dada48a-c5dd-4c30-9c85-5b03b0aa01f0@bfh.ch/
Cc: stable@vger.kernel.org
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20250514060523.2862195-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20250520075849.755012-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/video')
0 files changed, 0 insertions, 0 deletions