Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fix from Joerg Roedel:
"Fix an AMD IOMMU issue where the driver didn't correctly setup the
exclusion range in the hardware registers, resulting in exclusion
ranges being one page too big.
This can cause data corruption of the address of that last page is
used by DMA operations"
* tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Set exclusion range correctly
+1
-1
+1
-1
drivers/iommu/amd_iommu_init.c
+1
-1
drivers/iommu/amd_iommu_init.c
···
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static void iommu_set_exclusion_range(struct amd_iommu *iommu)
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{
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u64 start = iommu->exclusion_start & PAGE_MASK;
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-
u64 limit = (start + iommu->exclusion_length) & PAGE_MASK;
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+
u64 limit = (start + iommu->exclusion_length - 1) & PAGE_MASK;
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u64 entry;
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if (!iommu->exclusion_start)