diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/iommu/intel-iommu.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 2a165010a1c1..4c780efff169 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c | |||
@@ -78,6 +78,24 @@ | |||
78 | #define LEVEL_STRIDE (9) | 78 | #define LEVEL_STRIDE (9) |
79 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) | 79 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) |
80 | 80 | ||
81 | /* | ||
82 | * This bitmap is used to advertise the page sizes our hardware support | ||
83 | * to the IOMMU core, which will then use this information to split | ||
84 | * physically contiguous memory regions it is mapping into page sizes | ||
85 | * that we support. | ||
86 | * | ||
87 | * Traditionally the IOMMU core just handed us the mappings directly, | ||
88 | * after making sure the size is an order of a 4KiB page and that the | ||
89 | * mapping has natural alignment. | ||
90 | * | ||
91 | * To retain this behavior, we currently advertise that we support | ||
92 | * all page sizes that are an order of 4KiB. | ||
93 | * | ||
94 | * If at some point we'd like to utilize the IOMMU core's new behavior, | ||
95 | * we could change this to advertise the real page sizes we support. | ||
96 | */ | ||
97 | #define INTEL_IOMMU_PGSIZES (~0xFFFUL) | ||
98 | |||
81 | static inline int agaw_to_level(int agaw) | 99 | static inline int agaw_to_level(int agaw) |
82 | { | 100 | { |
83 | return agaw + 2; | 101 | return agaw + 2; |
@@ -4066,6 +4084,7 @@ static struct iommu_ops intel_iommu_ops = { | |||
4066 | .unmap = intel_iommu_unmap, | 4084 | .unmap = intel_iommu_unmap, |
4067 | .iova_to_phys = intel_iommu_iova_to_phys, | 4085 | .iova_to_phys = intel_iommu_iova_to_phys, |
4068 | .domain_has_cap = intel_iommu_domain_has_cap, | 4086 | .domain_has_cap = intel_iommu_domain_has_cap, |
4087 | .pgsize_bitmap = INTEL_IOMMU_PGSIZES, | ||
4069 | }; | 4088 | }; |
4070 | 4089 | ||
4071 | static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) | 4090 | static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) |