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iommupt/x86: Set the dirty bit only for writable PTEs

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AMD and VTD are historically different here, adopt the VTD version of
setting the D bit only on writable PTEs as it makes more sense.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Jason Gunthorpe
2025-10-23 15:22:34 -03:00
committed by Joerg Roedel
parent 5448c1558f
commit 1978fac281
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/generic_pt/fmt/x86_64.h
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@@ -192,9 +192,9 @@ static inline int x86_64_pt_iommu_set_prot(struct pt_common *common,
{
u64 pte;
pte = X86_64_FMT_U | X86_64_FMT_A | X86_64_FMT_D;
pte = X86_64_FMT_U | X86_64_FMT_A;
if (iommu_prot & IOMMU_WRITE)
pte |= X86_64_FMT_RW;
pte |= X86_64_FMT_RW | X86_64_FMT_D;
/*
* Ideally we'd have an IOMMU_ENCRYPTED flag set by higher levels to