diff options
| -rw-r--r-- | drivers/iommu/amd/amd_iommu.h | 7 | ||||
| -rw-r--r-- | drivers/iommu/amd/init.c | 3 |
2 files changed, 7 insertions, 3 deletions
diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index 6386fa4556d9..3b6c6332b09f 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -118,9 +118,14 @@ static inline bool check_feature2(u64 mask) return (amd_iommu_efr2 & mask); } +static inline bool amd_iommu_v2_pgtbl_supported(void) +{ + return (check_feature(FEATURE_GIOSUP) && check_feature(FEATURE_GT)); +} + static inline bool amd_iommu_gt_ppr_supported(void) { - return (check_feature(FEATURE_GT) && + return (amd_iommu_v2_pgtbl_supported() && check_feature(FEATURE_PPR) && check_feature(FEATURE_EPHSUP)); } diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 43131c3a2172..7ae478d95e2b 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -2071,8 +2071,7 @@ static int __init iommu_init_pci(struct amd_iommu *iommu) init_iommu_perf_ctr(iommu); if (amd_iommu_pgtable == AMD_IOMMU_V2) { - if (!check_feature(FEATURE_GIOSUP) || - !check_feature(FEATURE_GT)) { + if (!amd_iommu_v2_pgtbl_supported()) { pr_warn("Cannot enable v2 page table for DMA-API. Fallback to v1.\n"); amd_iommu_pgtable = AMD_IOMMU_V1; } |