Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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/bits.h>
22#include <linux/types.h>
23#include <linux/spinlock_types.h>
24
25#include <asm/kvm_types.h>
26
27/*
28 * Address types:
29 *
30 * gva - guest virtual address
31 * gpa - guest physical address
32 * gfn - guest frame number
33 * hva - host virtual address
34 * hpa - host physical address
35 * hfn - host frame number
36 */
37
38typedef unsigned long gva_t;
39typedef u64 gpa_t;
40typedef u64 gfn_t;
41
42#define GPA_INVALID (~(gpa_t)0)
43
44typedef unsigned long hva_t;
45typedef u64 hpa_t;
46typedef u64 hfn_t;
47
48typedef hfn_t kvm_pfn_t;
49
50enum pfn_cache_usage {
51 KVM_GUEST_USES_PFN = BIT(0),
52 KVM_HOST_USES_PFN = BIT(1),
53 KVM_GUEST_AND_HOST_USE_PFN = KVM_GUEST_USES_PFN | KVM_HOST_USES_PFN,
54};
55
56struct gfn_to_hva_cache {
57 u64 generation;
58 gpa_t gpa;
59 unsigned long hva;
60 unsigned long len;
61 struct kvm_memory_slot *memslot;
62};
63
64struct gfn_to_pfn_cache {
65 u64 generation;
66 gpa_t gpa;
67 unsigned long uhva;
68 struct kvm_memory_slot *memslot;
69 struct kvm_vcpu *vcpu;
70 struct list_head list;
71 rwlock_t lock;
72 void *khva;
73 kvm_pfn_t pfn;
74 enum pfn_cache_usage usage;
75 bool active;
76 bool valid;
77};
78
79#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
80/*
81 * Memory caches are used to preallocate memory ahead of various MMU flows,
82 * e.g. page fault handlers. Gracefully handling allocation failures deep in
83 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
84 * holding MMU locks. Note, these caches act more like prefetch buffers than
85 * classical caches, i.e. objects are not returned to the cache on being freed.
86 */
87struct kvm_mmu_memory_cache {
88 int nobjs;
89 gfp_t gfp_zero;
90 struct kmem_cache *kmem_cache;
91 void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
92};
93#endif
94
95#define HALT_POLL_HIST_COUNT 32
96
97struct kvm_vm_stat_generic {
98 u64 remote_tlb_flush;
99 u64 remote_tlb_flush_requests;
100};
101
102struct kvm_vcpu_stat_generic {
103 u64 halt_successful_poll;
104 u64 halt_attempted_poll;
105 u64 halt_poll_invalid;
106 u64 halt_wakeup;
107 u64 halt_poll_success_ns;
108 u64 halt_poll_fail_ns;
109 u64 halt_wait_ns;
110 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
111 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
112 u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
113 u64 blocking;
114};
115
116#define KVM_STATS_NAME_SIZE 48
117
118#endif /* __KVM_TYPES_H__ */