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 
80 #endif /* __KVM_TYPES_H__ */
81