diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2023-09-21 12:21:42 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-09-25 13:39:04 +0300 |
| commit | e339b51c13ffb2173ea28679547f3abca7f4d76a (patch) | |
| tree | 1c0230ae36855ff817279090071bb7fbbfd10d89 /drivers/iommu/amd/amd_iommu.h | |
| parent | 7b7563a93437ef945c829538da28f0095f1603ec (diff) | |
| download | linux-e339b51c13ffb2173ea28679547f3abca7f4d76a.tar.xz | |
iommu/amd: Modify logic for checking GT and PPR features
In order to support v2 page table, IOMMU driver need to check if the
hardware can support Guest Translation (GT) and Peripheral Page Request
(PPR) features. Currently, IOMMU driver uses global (amd_iommu_v2_present)
and per-iommu (struct amd_iommu.is_iommu_v2) variables to track the
features. There variables area redundant since we could simply just check
the global EFR mask.
Therefore, replace it with a helper function with appropriate name.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
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/20230921092147.5930-10-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd/amd_iommu.h')
| -rw-r--r-- | drivers/iommu/amd/amd_iommu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index e1b0eeead074..5395a21215b9 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -102,6 +102,12 @@ static inline int check_feature_gpt_level(void) return ((amd_iommu_efr >> FEATURE_GATS_SHIFT) & FEATURE_GATS_MASK); } +static inline bool amd_iommu_gt_ppr_supported(void) +{ + return (check_feature(FEATURE_GT) && + check_feature(FEATURE_PPR)); +} + static inline u64 iommu_virt_to_phys(void *vaddr) { return (u64)__sme_set(virt_to_phys(vaddr)); |