diff options
Diffstat (limited to 'drivers/iommu/amd_iommu_types.h')
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index e400fbe..55ba46b 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -98,7 +98,12 @@ #define FEATURE_GLXVAL_SHIFT 14 #define FEATURE_GLXVAL_MASK (0x03ULL << FEATURE_GLXVAL_SHIFT) -#define PASID_MASK 0x000fffff +/* Note: + * The current driver only support 16-bit PASID. + * Currently, hardware only implement upto 16-bit PASID + * even though the spec says it could have upto 20 bits. + */ +#define PASID_MASK 0x0000ffff /* MMIO status bits */ #define MMIO_STATUS_EVT_INT_MASK (1 << 1) @@ -696,8 +701,8 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap; */ extern u32 amd_iommu_unmap_flush; -/* Smallest number of PASIDs supported by any IOMMU in the system */ -extern u32 amd_iommu_max_pasids; +/* Smallest max PASID supported by any IOMMU in the system */ +extern u32 amd_iommu_max_pasid; extern bool amd_iommu_v2_present; |
