0,0 → 1,48 |
#ifndef _DMA_REMAPPING_H |
#define _DMA_REMAPPING_H |
|
/* |
* VT-d hardware uses 4KiB page size regardless of host page size. |
*/ |
#define VTD_PAGE_SHIFT (12) |
#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT) |
#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT) |
#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK) |
|
#define VTD_STRIDE_SHIFT (9) |
#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT) |
|
#define DMA_PTE_READ (1) |
#define DMA_PTE_WRITE (2) |
#define DMA_PTE_LARGE_PAGE (1 << 7) |
#define DMA_PTE_SNP (1 << 11) |
|
#define CONTEXT_TT_MULTI_LEVEL 0 |
#define CONTEXT_TT_DEV_IOTLB 1 |
#define CONTEXT_TT_PASS_THROUGH 2 |
|
struct intel_iommu; |
struct dmar_domain; |
struct root_entry; |
|
|
#ifdef CONFIG_INTEL_IOMMU |
extern int iommu_calculate_agaw(struct intel_iommu *iommu); |
extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu); |
extern int dmar_disabled; |
extern int intel_iommu_enabled; |
#else |
static inline int iommu_calculate_agaw(struct intel_iommu *iommu) |
{ |
return 0; |
} |
static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu) |
{ |
return 0; |
} |
#define dmar_disabled (1) |
#define intel_iommu_enabled (0) |
#endif |
|
|
#endif |