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iommu/amd: Do not set amd_iommu_pgtable in pass-through mode

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Since AMD IOMMU page table is not used in passthrough mode, switching to
v1 page table is not required.

Therefore, remove redundant amd_iommu_pgtable update and misleading
warning message.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20230921092147.5930-7-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2023-09-21 09:21:39 +00:00 committed by Joerg Roedel
parent 206fb06dc5
commit 4c721d6a08
1 changed files with 0 additions and 3 deletions
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3
drivers/iommu/amd/init.c
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@ -2134,9 +2134,6 @@ static int __init iommu_init_pci(struct amd_iommu *iommu)
!iommu_feature(iommu, FEATURE_GT)) {
pr_warn("Cannot enable v2 page table for DMA-API. Fallback to v1.\n");
amd_iommu_pgtable = AMD_IOMMU_V1;
} else if (iommu_default_passthrough()) {
pr_warn("V2 page table doesn't support passthrough mode. Fallback to v1.\n");
amd_iommu_pgtable = AMD_IOMMU_V1;
}
}