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| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2023-09-21 12:21:41 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-09-25 13:39:03 +0300 |
| commit | 7b7563a93437ef945c829538da28f0095f1603ec (patch) | |
| tree | 91b5bcf1ca72bbcc1663267c6e8b05ce35bbda6a /drivers/iommu/amd/amd_iommu_types.h | |
| parent | 45677ab1e5ca65622b35cc231c5d31c699cfaefe (diff) | |
| download | linux-7b7563a93437ef945c829538da28f0095f1603ec.tar.xz | |
iommu/amd: Consolidate feature detection and reporting logic
Currently, IOMMU driver assumes capabilities on all IOMMU instances to be
homogeneous. During early_amd_iommu_init(), the driver probes all IVHD
blocks and do sanity check to make sure that only features common among all
IOMMU instances are supported. This is tracked in the global amd_iommu_efr
and amd_iommu_efr2, which should be used whenever the driver need to check
hardware capabilities.
Therefore, introduce check_feature() and check_feature2(), and modify
the driver to adopt the new helper functions.
In addition, clean up the print_iommu_info() to avoid reporting redundant
EFR/EFR2 for each IOMMU instance.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@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/20230921092147.5930-9-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd/amd_iommu_types.h')
| -rw-r--r-- | drivers/iommu/amd/amd_iommu_types.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index a8d264026f7f..22bdfb0ddfb7 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -897,6 +897,10 @@ extern bool amd_iommu_force_isolation; /* Max levels of glxval supported */ extern int amd_iommu_max_glx_val; +/* Global EFR and EFR2 registers */ +extern u64 amd_iommu_efr; +extern u64 amd_iommu_efr2; + /* * This function flushes all internal caches of * the IOMMU used by this driver. |