Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _DMA_REMAPPING_H
3#define _DMA_REMAPPING_H
4
5/*
6 * VT-d hardware uses 4KiB page size regardless of host page size.
7 */
8#define VTD_PAGE_SHIFT (12)
9#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
10#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
11#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
12
13#define VTD_STRIDE_SHIFT (9)
14#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
15
16#define DMA_PTE_READ (1)
17#define DMA_PTE_WRITE (2)
18#define DMA_PTE_LARGE_PAGE (1 << 7)
19#define DMA_PTE_SNP (1 << 11)
20
21#define CONTEXT_TT_MULTI_LEVEL 0
22#define CONTEXT_TT_DEV_IOTLB 1
23#define CONTEXT_TT_PASS_THROUGH 2
24/* Extended context entry types */
25#define CONTEXT_TT_PT_PASID 4
26#define CONTEXT_TT_PT_PASID_DEV_IOTLB 5
27#define CONTEXT_TT_MASK (7ULL << 2)
28
29#define CONTEXT_DINVE (1ULL << 8)
30#define CONTEXT_PRS (1ULL << 9)
31#define CONTEXT_PASIDE (1ULL << 11)
32
33struct intel_iommu;
34struct dmar_domain;
35struct root_entry;
36
37
38#ifdef CONFIG_INTEL_IOMMU
39extern int iommu_calculate_agaw(struct intel_iommu *iommu);
40extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
41extern int dmar_disabled;
42extern int intel_iommu_enabled;
43extern int intel_iommu_tboot_noforce;
44#else
45static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
46{
47 return 0;
48}
49static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
50{
51 return 0;
52}
53#define dmar_disabled (1)
54#define intel_iommu_enabled (0)
55#endif
56
57
58#endif