https://github.com/torvalds/linux
Revision 7fc961cf7ffcb130c4e93ee9a5628134f9de700a authored by Tina Zhang on 16 November 2022, 05:15:44 UTC, committed by Joerg Roedel on 19 November 2022, 09:46:52 UTC
SRS cap is the hardware cap telling if the hardware IOMMU can support
requests seeking supervisor privilege or not. SRE bit in scalable-mode
PASID table entry is treated as Reserved(0) for implementation not
supporting SRS cap.
Checking SRS cap before setting SRE bit can avoid the non-recoverable
fault of "Non-zero reserved field set in PASID Table Entry" caused by
setting SRE bit while there is no SRS cap support. The fault messages
look like below:
DMAR: DRHD: handling fault status reg 2
DMAR: [DMA Read NO_PASID] Request device [00:0d.0] fault addr 0x1154e1000
[fault reason 0x5a]
SM: Non-zero reserved field set in PASID Table Entry
Fixes: 6f7db75e1c46 ("iommu/vt-d: Add second level page table interface")
Cc: stable@vger.kernel.org
Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Link: https://lore.kernel.org/r/20221115070346.1112273-1-tina.zhang@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20221116051544.26540-3-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
1 parent 242b0aa
Tip revision: 7fc961cf7ffcb130c4e93ee9a5628134f9de700a authored by Tina Zhang on 16 November 2022, 05:15:44 UTC
iommu/vt-d: Set SRE bit only when hardware has SRS cap
iommu/vt-d: Set SRE bit only when hardware has SRS cap
Tip revision: 7fc961c
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| io_uring | ||
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| lib | ||
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| rust | ||
| samples | ||
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| security | ||
| sound | ||
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| .clang-format | -rw-r--r-- | 19.9 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 151 bytes |
| .gitattributes | -rw-r--r-- | 62 bytes |
| .gitignore | -rw-r--r-- | 2.0 KB |
| .mailmap | -rw-r--r-- | 24.2 KB |
| .rustfmt.toml | -rw-r--r-- | 369 bytes |
| COPYING | -rw-r--r-- | 496 bytes |
| CREDITS | -rw-r--r-- | 99.2 KB |
| Kbuild | -rw-r--r-- | 2.5 KB |
| Kconfig | -rw-r--r-- | 555 bytes |
| MAINTAINERS | -rw-r--r-- | 671.3 KB |
| Makefile | -rw-r--r-- | 69.0 KB |
| README | -rw-r--r-- | 727 bytes |
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