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__ */
120