diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-08-25 09:39:35 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-09-07 17:12:34 +0300 |
| commit | be1af02b277417be735d8513195e5ba1bc3c3a3d (patch) | |
| tree | db5c40d13bc8297329d8dd6d16f8bd3fffb5ad75 /drivers/iommu | |
| parent | 43312b710b11a085ec81eb7d1878f8858045ae2b (diff) | |
| download | linux-be1af02b277417be735d8513195e5ba1bc3c3a3d.tar.xz | |
iommu/amd: Update sanity check when enable PRI/ATS for IOMMU v1 table
Currently, PPR/ATS can be enabled only if the domain is type
identity mapping. However, when allowing the IOMMU v2 page table
to be used for DMA-API, the check is no longer valid.
Update the sanity check to only apply for when using AMD_IOMMU_V1
page table mode.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220825063939.8360-6-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 771709d1dfff..c882b06e2360 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1694,7 +1694,7 @@ static void pdev_iommuv2_disable(struct pci_dev *pdev) pci_disable_pasid(pdev); } -static int pdev_iommuv2_enable(struct pci_dev *pdev) +static int pdev_pri_ats_enable(struct pci_dev *pdev) { int ret; @@ -1757,11 +1757,19 @@ static int attach_device(struct device *dev, struct iommu_domain *def_domain = iommu_get_dma_domain(dev); ret = -EINVAL; - if (def_domain->type != IOMMU_DOMAIN_IDENTITY) + + /* + * In case of using AMD_IOMMU_V1 page table mode and the device + * is enabling for PPR/ATS support (using v2 table), + * we need to make sure that the domain type is identity map. + */ + if ((amd_iommu_pgtable == AMD_IOMMU_V1) && + def_domain->type != IOMMU_DOMAIN_IDENTITY) { goto out; + } if (dev_data->iommu_v2) { - if (pdev_iommuv2_enable(pdev) != 0) + if (pdev_pri_ats_enable(pdev) != 0) goto out; dev_data->ats.enabled = true; |