Commit 4c721d6a authored by Vasant Hegde's avatar Vasant Hegde Committed by Joerg Roedel
Browse files

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



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: default avatarVasant Hegde <vasant.hegde@amd.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarJerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20230921092147.5930-7-vasant.hegde@amd.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 206fb06d

drivers/iommu/amd/init.c

+0 −3
Original line number Diff line number Diff line
@@ -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;

		}

	}