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