1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
4 * Author: Joerg Roedel <joerg.roedel@amd.com>
5 * Leo Duran <leo.duran@amd.com>
6 */
7
8#ifndef _ASM_X86_AMD_IOMMU_H
9#define _ASM_X86_AMD_IOMMU_H
10
11#include <linux/types.h>
12
13struct amd_iommu;
14
15#ifdef CONFIG_AMD_IOMMU
16
17struct task_struct;
18struct pci_dev;
19
20extern void amd_iommu_detect(void);
21
22#else /* CONFIG_AMD_IOMMU */
23
24static inline void amd_iommu_detect(void) { }
25
26#endif /* CONFIG_AMD_IOMMU */
27
28#if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)
29
30/* IOMMU AVIC Function */
31extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));
32
33extern int amd_iommu_update_ga(void *data, int cpu, bool ga_log_intr);
34extern int amd_iommu_activate_guest_mode(void *data, int cpu, bool ga_log_intr);
35extern int amd_iommu_deactivate_guest_mode(void *data);
36
37#else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
38
39static inline int
40amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
41{
42 return 0;
43}
44
45static inline int amd_iommu_update_ga(void *data, int cpu, bool ga_log_intr)
46{
47 return 0;
48}
49
50static inline int amd_iommu_activate_guest_mode(void *data, int cpu, bool ga_log_intr)
51{
52 return 0;
53}
54
55static inline int amd_iommu_deactivate_guest_mode(void *data)
56{
57 return 0;
58}
59#endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
60
61int amd_iommu_get_num_iommus(void);
62bool amd_iommu_pc_supported(void);
63u8 amd_iommu_pc_get_max_banks(unsigned int idx);
64u8 amd_iommu_pc_get_max_counters(unsigned int idx);
65int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
66 u64 *value);
67int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
68 u64 *value);
69struct amd_iommu *get_amd_iommu(unsigned int idx);
70
71#ifdef CONFIG_KVM_AMD_SEV
72int amd_iommu_snp_disable(void);
73extern bool amd_iommu_sev_tio_supported(void);
74#else
75static inline int amd_iommu_snp_disable(void) { return 0; }
76static inline bool amd_iommu_sev_tio_supported(void) { return false; }
77#endif
78
79#endif /* _ASM_X86_AMD_IOMMU_H */
80

source code of linux/include/linux/amd-iommu.h