Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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#else
15#define EXPORT_SYMBOL_FOR_KVM_INTERNAL(symbol)
16#endif
17
18#ifndef __ASSEMBLER__
19
20#include <linux/mutex.h>
21#include <linux/spinlock_types.h>
22
23struct kvm;
24struct kvm_async_pf;
25struct kvm_device_ops;
26struct kvm_gfn_range;
27struct kvm_interrupt;
28struct kvm_irq_routing_table;
29struct kvm_memory_slot;
30struct kvm_one_reg;
31struct kvm_run;
32struct kvm_userspace_memory_region;
33struct kvm_vcpu;
34struct kvm_vcpu_init;
35struct kvm_memslots;
36
37enum kvm_mr_change;
38
39/*
40 * Address types:
41 *
42 * gva - guest virtual address
43 * gpa - guest physical address
44 * gfn - guest frame number
45 * hva - host virtual address
46 * hpa - host physical address
47 * hfn - host frame number
48 */
49
50typedef unsigned long gva_t;
51typedef u64 gpa_t;
52typedef u64 gfn_t;
53
54#define INVALID_GPA (~(gpa_t)0)
55
56typedef unsigned long hva_t;
57typedef u64 hpa_t;
58typedef u64 hfn_t;
59
60typedef hfn_t kvm_pfn_t;
61
62struct gfn_to_hva_cache {
63 u64 generation;
64 gpa_t gpa;
65 unsigned long hva;
66 unsigned long len;
67 struct kvm_memory_slot *memslot;
68};
69
70struct gfn_to_pfn_cache {
71 u64 generation;
72 gpa_t gpa;
73 unsigned long uhva;
74 struct kvm_memory_slot *memslot;
75 struct kvm *kvm;
76 struct list_head list;
77 rwlock_t lock;
78 struct mutex refresh_lock;
79 void *khva;
80 kvm_pfn_t pfn;
81 bool active;
82 bool valid;
83};
84
85#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
86/*
87 * Memory caches are used to preallocate memory ahead of various MMU flows,
88 * e.g. page fault handlers. Gracefully handling allocation failures deep in
89 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
90 * holding MMU locks. Note, these caches act more like prefetch buffers than
91 * classical caches, i.e. objects are not returned to the cache on being freed.
92 *
93 * The @capacity field and @objects array are lazily initialized when the cache
94 * is topped up (__kvm_mmu_topup_memory_cache()).
95 */
96struct kvm_mmu_memory_cache {
97 gfp_t gfp_zero;
98 gfp_t gfp_custom;
99 u64 init_value;
100 struct kmem_cache *kmem_cache;
101 int capacity;
102 int nobjs;
103 void **objects;
104};
105#endif
106
107#define HALT_POLL_HIST_COUNT 32
108
109struct kvm_vm_stat_generic {
110 u64 remote_tlb_flush;
111 u64 remote_tlb_flush_requests;
112};
113
114struct kvm_vcpu_stat_generic {
115 u64 halt_successful_poll;
116 u64 halt_attempted_poll;
117 u64 halt_poll_invalid;
118 u64 halt_wakeup;
119 u64 halt_poll_success_ns;
120 u64 halt_poll_fail_ns;
121 u64 halt_wait_ns;
122 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
123 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
124 u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
125 u64 blocking;
126};
127
128#define KVM_STATS_NAME_SIZE 48
129#endif /* !__ASSEMBLER__ */
130
131#endif /* __KVM_TYPES_H__ */