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
56struct 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 */
71struct 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
80#endif /* __KVM_TYPES_H__ */