Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2
3#ifndef __KVM_TYPES_H__
4#define __KVM_TYPES_H__
5
6struct kvm;
7struct kvm_async_pf;
8struct kvm_device_ops;
9struct kvm_gfn_range;
10struct kvm_interrupt;
11struct kvm_irq_routing_table;
12struct kvm_memory_slot;
13struct kvm_one_reg;
14struct kvm_run;
15struct kvm_userspace_memory_region;
16struct kvm_vcpu;
17struct kvm_vcpu_init;
18struct kvm_memslots;
19
20enum kvm_mr_change;
21
22#include <linux/bits.h>
23#include <linux/mutex.h>
24#include <linux/types.h>
25#include <linux/spinlock_types.h>
26
27#include <asm/kvm_types.h>
28
29/*
30 * Address types:
31 *
32 * gva - guest virtual address
33 * gpa - guest physical address
34 * gfn - guest frame number
35 * hva - host virtual address
36 * hpa - host physical address
37 * hfn - host frame number
38 */
39
40typedef unsigned long gva_t;
41typedef u64 gpa_t;
42typedef u64 gfn_t;
43
44#define INVALID_GPA (~(gpa_t)0)
45
46typedef unsigned long hva_t;
47typedef u64 hpa_t;
48typedef u64 hfn_t;
49
50typedef hfn_t kvm_pfn_t;
51
52enum pfn_cache_usage {
53 KVM_GUEST_USES_PFN = BIT(0),
54 KVM_HOST_USES_PFN = BIT(1),
55 KVM_GUEST_AND_HOST_USE_PFN = KVM_GUEST_USES_PFN | KVM_HOST_USES_PFN,
56};
57
58struct gfn_to_hva_cache {
59 u64 generation;
60 gpa_t gpa;
61 unsigned long hva;
62 unsigned long len;
63 struct kvm_memory_slot *memslot;
64};
65
66struct gfn_to_pfn_cache {
67 u64 generation;
68 gpa_t gpa;
69 unsigned long uhva;
70 struct kvm_memory_slot *memslot;
71 struct kvm *kvm;
72 struct kvm_vcpu *vcpu;
73 struct list_head list;
74 rwlock_t lock;
75 struct mutex refresh_lock;
76 void *khva;
77 kvm_pfn_t pfn;
78 enum pfn_cache_usage usage;
79 bool active;
80 bool valid;
81};
82
83#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
84/*
85 * Memory caches are used to preallocate memory ahead of various MMU flows,
86 * e.g. page fault handlers. Gracefully handling allocation failures deep in
87 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
88 * holding MMU locks. Note, these caches act more like prefetch buffers than
89 * classical caches, i.e. objects are not returned to the cache on being freed.
90 *
91 * The @capacity field and @objects array are lazily initialized when the cache
92 * is topped up (__kvm_mmu_topup_memory_cache()).
93 */
94struct kvm_mmu_memory_cache {
95 gfp_t gfp_zero;
96 gfp_t gfp_custom;
97 struct kmem_cache *kmem_cache;
98 int capacity;
99 int nobjs;
100 void **objects;
101};
102#endif
103
104#define HALT_POLL_HIST_COUNT 32
105
106struct kvm_vm_stat_generic {
107 u64 remote_tlb_flush;
108 u64 remote_tlb_flush_requests;
109};
110
111struct kvm_vcpu_stat_generic {
112 u64 halt_successful_poll;
113 u64 halt_attempted_poll;
114 u64 halt_poll_invalid;
115 u64 halt_wakeup;
116 u64 halt_poll_success_ns;
117 u64 halt_poll_fail_ns;
118 u64 halt_wait_ns;
119 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
120 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
121 u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
122 u64 blocking;
123};
124
125#define KVM_STATS_NAME_SIZE 48
126
127#endif /* __KVM_TYPES_H__ */