include/linux/amd-iommu.h

   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
  13 struct amd_iommu;
  14
  15 /*
  16  * This is mainly used to communicate information back-and-forth
  17  * between SVM and IOMMU for setting up and tearing down posted
  18  * interrupt
  19  */
  20 struct amd_iommu_pi_data {
  21         u32 ga_tag;
  22         u32 prev_ga_tag;
  23         u64 base;
  24         bool is_guest_mode;
  25         struct vcpu_data *vcpu_data;
  26         void *ir_data;
  27 };
  28
  29 #ifdef CONFIG_AMD_IOMMU
  30
  31 struct task_struct;
  32 struct pci_dev;
  33
  34 extern int amd_iommu_detect(void);
  35
  36 #else /* CONFIG_AMD_IOMMU */
  37
  38 static inline int amd_iommu_detect(void) { return -ENODEV; }
  39
  40 #endif /* CONFIG_AMD_IOMMU */
  41
  42 #if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)
  43
  44 /* IOMMU AVIC Function */
  45 extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));
  46
  47 extern int
  48 amd_iommu_update_ga(int cpu, bool is_run, void *data);
  49
  50 extern int amd_iommu_activate_guest_mode(void *data);
  51 extern int amd_iommu_deactivate_guest_mode(void *data);
  52
  53 #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
  54
  55 static inline int
  56 amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
  57 {
  58         return 0;
  59 }
  60
  61 static inline int
  62 amd_iommu_update_ga(int cpu, bool is_run, void *data)
  63 {
  64         return 0;
  65 }
  66
  67 static inline int amd_iommu_activate_guest_mode(void *data)
  68 {
  69         return 0;
  70 }
  71
  72 static inline int amd_iommu_deactivate_guest_mode(void *data)
  73 {
  74         return 0;
  75 }
  76 #endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
  77
  78 int amd_iommu_get_num_iommus(void);
  79 bool amd_iommu_pc_supported(void);
  80 u8 amd_iommu_pc_get_max_banks(unsigned int idx);
  81 u8 amd_iommu_pc_get_max_counters(unsigned int idx);
  82 int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
  83                 u64 *value);
  84 int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
  85                 u64 *value);
  86 struct amd_iommu *get_amd_iommu(unsigned int idx);
  87
  88 #ifdef CONFIG_KVM_AMD_SEV
  89 int amd_iommu_snp_disable(void);
  90 #else
  91 static inline int amd_iommu_snp_disable(void) { return 0; }
  92 #endif
  93
  94 #endif /* _ASM_X86_AMD_IOMMU_H */