1 /* SPDX-License-Identifier: GPL-2.0-only */
3 #ifndef __KVM_TYPES_H__
4 #define __KVM_TYPES_H__
10 struct kvm_irq_routing_table;
11 struct kvm_memory_slot;
14 struct kvm_userspace_memory_region;
21 #include <linux/bits.h>
22 #include <linux/mutex.h>
23 #include <linux/types.h>
24 #include <linux/spinlock_types.h>
26 #include <asm/kvm_types.h>
31 * gva - guest virtual address
32 * gpa - guest physical address
33 * gfn - guest frame number
34 * hva - host virtual address
35 * hpa - host physical address
36 * hfn - host frame number
39 typedef unsigned long gva_t;
43 #define INVALID_GPA (~(gpa_t)0)
45 typedef unsigned long hva_t;
49 typedef hfn_t kvm_pfn_t;
51 enum pfn_cache_usage {
52 KVM_GUEST_USES_PFN = BIT(0),
53 KVM_HOST_USES_PFN = BIT(1),
54 KVM_GUEST_AND_HOST_USE_PFN = KVM_GUEST_USES_PFN | KVM_HOST_USES_PFN,
57 struct gfn_to_hva_cache {
62 struct kvm_memory_slot *memslot;
65 struct gfn_to_pfn_cache {
69 struct kvm_memory_slot *memslot;
71 struct kvm_vcpu *vcpu;
72 struct list_head list;
74 struct mutex refresh_lock;
77 enum pfn_cache_usage usage;
82 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
84 * Memory caches are used to preallocate memory ahead of various MMU flows,
85 * e.g. page fault handlers. Gracefully handling allocation failures deep in
86 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
87 * holding MMU locks. Note, these caches act more like prefetch buffers than
88 * classical caches, i.e. objects are not returned to the cache on being freed.
90 * The @capacity field and @objects array are lazily initialized when the cache
91 * is topped up (__kvm_mmu_topup_memory_cache()).
93 struct kvm_mmu_memory_cache {
96 struct kmem_cache *kmem_cache;
103 #define HALT_POLL_HIST_COUNT 32
105 struct kvm_vm_stat_generic {
106 u64 remote_tlb_flush;
107 u64 remote_tlb_flush_requests;
110 struct kvm_vcpu_stat_generic {
111 u64 halt_successful_poll;
112 u64 halt_attempted_poll;
113 u64 halt_poll_invalid;
115 u64 halt_poll_success_ns;
116 u64 halt_poll_fail_ns;
118 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
119 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
120 u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
124 #define KVM_STATS_NAME_SIZE 48
126 #endif /* __KVM_TYPES_H__ */