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UBUNTU: SAUCE: iommu: intel-ipu: use IOMMU passthrough mode for Intel IPUs on Raptor Lake

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BugLink: https://bugs.launchpad.net/bugs/1989041

Intel IPU(Image Processing Unit) has its own (IO)MMU hardware,
The IPU driver allocates its own page table that is not mapped
via the DMA, and thus the Intel IOMMU driver blocks access giving
this error: DMAR: DRHD: handling fault status reg 3 DMAR:
[DMA Read] Request device [00:05.0] PASID ffffffff
fault addr 76406000 [fault reason 06] PTE Read access is not set
As IPU is not an external facing device which is not risky, so use
IOMMU passthrough mode for Intel IPUs.

(backported from https://github.com/intel/ipu6-drivers/blob/89c6b99e4bec00a04b53f37cd8c3c01ce824a4ab/patch/IOMMU-passthrough-for-intel-ipu.diff)
Signed-off-by: You-Sheng Yang <vicamo.yang@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
This commit is contained in:
zouxiaoh
2022-02-23 10:21:25 +08:00
committed by Paolo Pisati
parent f0ba482060
commit 25fbe6525b
1 changed files with 2 additions and 1 deletions
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drivers/iommu/intel/iommu.c
+2 -1
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@@ -39,7 +39,8 @@
#define IS_USB_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_SERIAL_USB)
#define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA)
#define IS_INTEL_IPU(pdev) ((pdev)->vendor == PCI_VENDOR_ID_INTEL && \
((pdev)->device == 0x9a19 || \
((pdev)->device == 0xa75d || \
(pdev)->device == 0x9a19 || \
(pdev)->device == 0x9a39 || \
(pdev)->device == 0x4e19 || \
(pdev)->device == 0x465d || \