Merge branch 'misc.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-2.6-microblaze.git] / include / linux / kvm_types.h
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 struct 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  */
71 struct 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 #define HALT_POLL_HIST_COUNT                    32
80
81 struct kvm_vm_stat_generic {
82         u64 remote_tlb_flush;
83         u64 remote_tlb_flush_requests;
84 };
85
86 struct kvm_vcpu_stat_generic {
87         u64 halt_successful_poll;
88         u64 halt_attempted_poll;
89         u64 halt_poll_invalid;
90         u64 halt_wakeup;
91         u64 halt_poll_success_ns;
92         u64 halt_poll_fail_ns;
93         u64 halt_wait_ns;
94         u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
95         u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
96         u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
97 };
98
99 #define KVM_STATS_NAME_SIZE     48
100
101 #endif /* __KVM_TYPES_H__ */