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56 lines
1.4 KiB
56 lines
1.4 KiB
#ifndef _DMA_REMAPPING_H |
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#define _DMA_REMAPPING_H |
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/* |
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* VT-d hardware uses 4KiB page size regardless of host page size. |
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*/ |
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#define VTD_PAGE_SHIFT (12) |
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#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT) |
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#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT) |
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#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK) |
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#define VTD_STRIDE_SHIFT (9) |
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#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT) |
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#define DMA_PTE_READ (1) |
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#define DMA_PTE_WRITE (2) |
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#define DMA_PTE_LARGE_PAGE (1 << 7) |
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#define DMA_PTE_SNP (1 << 11) |
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#define CONTEXT_TT_MULTI_LEVEL 0 |
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#define CONTEXT_TT_DEV_IOTLB 1 |
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#define CONTEXT_TT_PASS_THROUGH 2 |
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/* Extended context entry types */ |
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#define CONTEXT_TT_PT_PASID 4 |
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#define CONTEXT_TT_PT_PASID_DEV_IOTLB 5 |
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#define CONTEXT_TT_MASK (7ULL << 2) |
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#define CONTEXT_DINVE (1ULL << 8) |
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#define CONTEXT_PRS (1ULL << 9) |
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#define CONTEXT_PASIDE (1ULL << 11) |
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struct intel_iommu; |
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struct dmar_domain; |
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struct root_entry; |
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#ifdef CONFIG_INTEL_IOMMU |
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extern int iommu_calculate_agaw(struct intel_iommu *iommu); |
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extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu); |
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extern int dmar_disabled; |
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extern int intel_iommu_enabled; |
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#else |
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static inline int iommu_calculate_agaw(struct intel_iommu *iommu) |
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{ |
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return 0; |
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} |
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static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu) |
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{ |
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return 0; |
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} |
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#define dmar_disabled (1) |
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#define intel_iommu_enabled (0) |
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#endif |
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#endif
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