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_interrupt;
10 struct kvm_irq_routing_table;
11 struct kvm_memory_slot;
12 struct kvm_one_reg;
13 struct kvm_run;
14 struct kvm_userspace_memory_region;
15 struct kvm_vcpu;
16 struct kvm_vcpu_init;
17 struct kvm_memslots;
18 
19 enum 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 
36 typedef unsigned long  gva_t;
37 typedef u64            gpa_t;
38 typedef u64            gfn_t;
39 
40 #define GPA_INVALID	(~(gpa_t)0)
41 
42 typedef unsigned long  hva_t;
43 typedef u64            hpa_t;
44 typedef u64            hfn_t;
45 
46 typedef hfn_t kvm_pfn_t;
47 
48 struct 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 
56 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
57 /*
58  * Memory caches are used to preallocate memory ahead of various MMU flows,
59  * e.g. page fault handlers.  Gracefully handling allocation failures deep in
60  * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
61  * holding MMU locks.  Note, these caches act more like prefetch buffers than
62  * classical caches, i.e. objects are not returned to the cache on being freed.
63  */
64 struct kvm_mmu_memory_cache {
65 	int nobjs;
66 	gfp_t gfp_zero;
67 	struct kmem_cache *kmem_cache;
68 	void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
69 };
70 #endif
71 
72 #define HALT_POLL_HIST_COUNT			32
73 
74 struct kvm_vm_stat_generic {
75 	u64 remote_tlb_flush;
76 	u64 remote_tlb_flush_requests;
77 };
78 
79 struct kvm_vcpu_stat_generic {
80 	u64 halt_successful_poll;
81 	u64 halt_attempted_poll;
82 	u64 halt_poll_invalid;
83 	u64 halt_wakeup;
84 	u64 halt_poll_success_ns;
85 	u64 halt_poll_fail_ns;
86 	u64 halt_wait_ns;
87 	u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
88 	u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
89 	u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
90 };
91 
92 #define KVM_STATS_NAME_SIZE	48
93 
94 #endif /* __KVM_TYPES_H__ */
95