xref: /linux/include/linux/kvm_types.h (revision f4b0c4b508364fde023e4f7b9f23f7e38c663dfe)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #ifndef __KVM_TYPES_H__
4 #define __KVM_TYPES_H__
5 
6 struct kvm;
7 struct kvm_async_pf;
8 struct kvm_device_ops;
9 struct kvm_gfn_range;
10 struct kvm_interrupt;
11 struct kvm_irq_routing_table;
12 struct kvm_memory_slot;
13 struct kvm_one_reg;
14 struct kvm_run;
15 struct kvm_userspace_memory_region;
16 struct kvm_vcpu;
17 struct kvm_vcpu_init;
18 struct kvm_memslots;
19 
20 enum 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 
40 typedef unsigned long  gva_t;
41 typedef u64            gpa_t;
42 typedef u64            gfn_t;
43 
44 #define INVALID_GPA	(~(gpa_t)0)
45 
46 typedef unsigned long  hva_t;
47 typedef u64            hpa_t;
48 typedef u64            hfn_t;
49 
50 typedef hfn_t kvm_pfn_t;
51 
52 struct 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 
60 struct 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  */
86 struct kvm_mmu_memory_cache {
87 	gfp_t gfp_zero;
88 	gfp_t gfp_custom;
89 	u64 init_value;
90 	struct kmem_cache *kmem_cache;
91 	int capacity;
92 	int nobjs;
93 	void **objects;
94 };
95 #endif
96 
97 #define HALT_POLL_HIST_COUNT			32
98 
99 struct kvm_vm_stat_generic {
100 	u64 remote_tlb_flush;
101 	u64 remote_tlb_flush_requests;
102 };
103 
104 struct kvm_vcpu_stat_generic {
105 	u64 halt_successful_poll;
106 	u64 halt_attempted_poll;
107 	u64 halt_poll_invalid;
108 	u64 halt_wakeup;
109 	u64 halt_poll_success_ns;
110 	u64 halt_poll_fail_ns;
111 	u64 halt_wait_ns;
112 	u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
113 	u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
114 	u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
115 	u64 blocking;
116 };
117 
118 #define KVM_STATS_NAME_SIZE	48
119 
120 #endif /* __KVM_TYPES_H__ */
121