From: Vasant Hegde <vasant.hegde@amd.com>
To: <iommu@lists.linux.dev>, <joro@8bytes.org>
Cc: <suravee.suthikulpanit@amd.com>, <wei.huang2@amd.com>,
<jsnitsel@redhat.com>, <jgg@ziepe.ca>,
Vasant Hegde <vasant.hegde@amd.com>,
Jason Gunthorpe <jgg@nvidia.com>
Subject: [PATCH v6 06/14] iommu/amd: Do not set amd_iommu_pgtable in pass-through mode
Date: Thu, 21 Sep 2023 09:21:39 +0000 [thread overview]
Message-ID: <20230921092147.5930-7-vasant.hegde@amd.com> (raw)
In-Reply-To: <20230921092147.5930-1-vasant.hegde@amd.com>
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>
---
drivers/iommu/amd/init.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 852e40b13d20..2b01dfde6cab 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -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;
}
}
--
2.31.1
next prev parent reply other threads:[~2023-09-21 9:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-21 9:21 [PATCH v6 00/14] iommu/amd: SVA Support (Part 1) - cleanup/refactoring Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 01/14] iommu/amd: Remove unused amd_io_pgtable.pt_root variable Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 02/14] iommu/amd: Consolidate timeout pre-define to amd_iommu_type.h Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 03/14] iommu/amd: Consolidate logic to allocate protection domain Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 04/14] iommu/amd: Refactor protection domain allocation code Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 05/14] iommu/amd: Introduce helper functions for managing GCR3 table Vasant Hegde
2023-09-21 9:21 ` Vasant Hegde [this message]
2023-09-21 9:21 ` [PATCH v6 07/14] iommu/amd: Miscellaneous clean up when free domain Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 08/14] iommu/amd: Consolidate feature detection and reporting logic Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 09/14] iommu/amd: Modify logic for checking GT and PPR features Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 10/14] iommu/amd: Rename ats related variables Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 11/14] iommu/amd: Introduce iommu_dev_data.ppr Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 12/14] iommu/amd: Introduce iommu_dev_data.flags to track device capabilities Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 13/14] iommu/amd: Enable device ATS/PASID/PRI capabilities independently Vasant Hegde
2023-09-21 9:21 ` [PATCH v6 14/14] iommu/amd: Initialize iommu_device->max_pasids Vasant Hegde
2023-09-21 9:49 ` [PATCH v6 00/14] iommu/amd: SVA Support (Part 1) - cleanup/refactoring Vasant Hegde
2023-09-21 17:21 ` Jason Gunthorpe
2023-09-25 10:40 ` Joerg Roedel
2023-09-25 11:02 ` Vasant Hegde
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