1/* SPDX-License-Identifier: GPL-2.0-only */
2
3#ifndef __KVM_TYPES_H__
4#define __KVM_TYPES_H__
5
6#include <linux/bits.h>
7#include <linux/export.h>
8#include <linux/types.h>
9#include <asm/kvm_types.h>
10
11#ifdef KVM_SUB_MODULES
12#define EXPORT_SYMBOL_FOR_KVM_INTERNAL(symbol) \
13 EXPORT_SYMBOL_FOR_MODULES(symbol, __stringify(KVM_SUB_MODULES))
14#define EXPORT_SYMBOL_FOR_KVM(symbol) \
15 EXPORT_SYMBOL_FOR_MODULES(symbol, "kvm," __stringify(KVM_SUB_MODULES))
16#else
17#define EXPORT_SYMBOL_FOR_KVM_INTERNAL(symbol)
18/*
19 * Allow architectures to provide a custom EXPORT_SYMBOL_FOR_KVM, but only
20 * if there are no submodules, e.g. to allow suppressing exports if KVM=m, but
21 * kvm.ko won't actually be built (due to lack of at least one submodule).
22 */
23#ifndef EXPORT_SYMBOL_FOR_KVM
24#if IS_MODULE(CONFIG_KVM)
25#define EXPORT_SYMBOL_FOR_KVM(symbol) EXPORT_SYMBOL_FOR_MODULES(symbol, "kvm")
26#else
27#define EXPORT_SYMBOL_FOR_KVM(symbol)
28#endif /* IS_MODULE(CONFIG_KVM) */
29#endif /* EXPORT_SYMBOL_FOR_KVM */
30#endif
31
32#ifndef __ASSEMBLER__
33
34#include <linux/mutex.h>
35#include <linux/spinlock_types.h>
36
37struct kvm;
38struct kvm_async_pf;
39struct kvm_device_ops;
40struct kvm_gfn_range;
41struct kvm_interrupt;
42struct kvm_irq_routing_table;
43struct kvm_memory_slot;
44struct kvm_one_reg;
45struct kvm_run;
46struct kvm_userspace_memory_region;
47struct kvm_vcpu;
48struct kvm_vcpu_init;
49struct kvm_memslots;
50
51enum kvm_mr_change;
52
53/*
54 * Address types:
55 *
56 * gva - guest virtual address
57 * gpa - guest physical address
58 * gfn - guest frame number
59 * hva - host virtual address
60 * hpa - host physical address
61 * hfn - host frame number
62 */
63
64typedef unsigned long gva_t;
65typedef u64 gpa_t;
66typedef u64 gfn_t;
67
68#define INVALID_GPA (~(gpa_t)0)
69
70typedef unsigned long hva_t;
71typedef u64 hpa_t;
72typedef u64 hfn_t;
73
74typedef hfn_t kvm_pfn_t;
75
76struct gfn_to_hva_cache {
77 u64 generation;
78 gpa_t gpa;
79 unsigned long hva;
80 unsigned long len;
81 struct kvm_memory_slot *memslot;
82};
83
84struct gfn_to_pfn_cache {
85 u64 generation;
86 gpa_t gpa;
87 unsigned long uhva;
88 struct kvm_memory_slot *memslot;
89 struct kvm *kvm;
90 struct list_head list;
91 rwlock_t lock;
92 struct mutex refresh_lock;
93 void *khva;
94 kvm_pfn_t pfn;
95 bool active;
96 bool valid;
97};
98
99#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
100/*
101 * Memory caches are used to preallocate memory ahead of various MMU flows,
102 * e.g. page fault handlers. Gracefully handling allocation failures deep in
103 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
104 * holding MMU locks. Note, these caches act more like prefetch buffers than
105 * classical caches, i.e. objects are not returned to the cache on being freed.
106 *
107 * The @capacity field and @objects array are lazily initialized when the cache
108 * is topped up (__kvm_mmu_topup_memory_cache()).
109 */
110struct kvm_mmu_memory_cache {
111 gfp_t gfp_zero;
112 gfp_t gfp_custom;
113 u64 init_value;
114 struct kmem_cache *kmem_cache;
115 int capacity;
116 int nobjs;
117 void **objects;
118};
119#endif
120
121#define HALT_POLL_HIST_COUNT 32
122
123struct kvm_vm_stat_generic {
124 u64 remote_tlb_flush;
125 u64 remote_tlb_flush_requests;
126};
127
128struct kvm_vcpu_stat_generic {
129 u64 halt_successful_poll;
130 u64 halt_attempted_poll;
131 u64 halt_poll_invalid;
132 u64 halt_wakeup;
133 u64 halt_poll_success_ns;
134 u64 halt_poll_fail_ns;
135 u64 halt_wait_ns;
136 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
137 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
138 u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
139 u64 blocking;
140};
141
142#define KVM_STATS_NAME_SIZE 48
143#endif /* !__ASSEMBLER__ */
144
145#endif /* __KVM_TYPES_H__ */
146

source code of linux/include/linux/kvm_types.h