Linux kernel mirror (for testing)
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linux
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
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 */
64struct 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
74struct kvm_vm_stat_generic {
75 u64 remote_tlb_flush;
76 u64 remote_tlb_flush_requests;
77};
78
79struct 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__ */