kvm_types.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2
  3#ifndef __KVM_TYPES_H__
  4#define __KVM_TYPES_H__
  5
  6#include <linux/bits.h>
  7#include <linux/export.h>
  8#include <linux/types.h>
  9#include <asm/kvm_types.h>
 10
 11#ifdef KVM_SUB_MODULES
 12#define EXPORT_SYMBOL_FOR_KVM_INTERNAL(symbol) \
 13	EXPORT_SYMBOL_FOR_MODULES(symbol, __stringify(KVM_SUB_MODULES))
 14#define EXPORT_SYMBOL_FOR_KVM(symbol) \
 15	EXPORT_SYMBOL_FOR_MODULES(symbol, "kvm," __stringify(KVM_SUB_MODULES))
 16#else
 17#define EXPORT_SYMBOL_FOR_KVM_INTERNAL(symbol)
 18/*
 19 * Allow architectures to provide a custom EXPORT_SYMBOL_FOR_KVM, but only
 20 * if there are no submodules, e.g. to allow suppressing exports if KVM=m, but
 21 * kvm.ko won't actually be built (due to lack of at least one submodule).
 22 */
 23#ifndef EXPORT_SYMBOL_FOR_KVM
 24#if IS_MODULE(CONFIG_KVM)
 25#define EXPORT_SYMBOL_FOR_KVM(symbol) EXPORT_SYMBOL_FOR_MODULES(symbol, "kvm")
 26#else
 27#define EXPORT_SYMBOL_FOR_KVM(symbol)
 28#endif /* IS_MODULE(CONFIG_KVM) */
 29#endif /* EXPORT_SYMBOL_FOR_KVM */
 30#endif
 31
 32#ifndef __ASSEMBLER__
 33
 34#include <linux/mutex.h>
 35#include <linux/spinlock_types.h>
 36
 37struct kvm;
 38struct kvm_async_pf;
 39struct kvm_device_ops;
 40struct kvm_gfn_range;
 41struct kvm_interrupt;
 42struct kvm_irq_routing_table;
 43struct kvm_memory_slot;
 44struct kvm_one_reg;
 45struct kvm_run;
 46struct kvm_userspace_memory_region;
 47struct kvm_vcpu;
 48struct kvm_vcpu_init;
 49struct kvm_memslots;
 50
 51enum kvm_mr_change;
 52
 53/*
 54 * Address types:
 55 *
 56 *  gva - guest virtual address
 57 *  gpa - guest physical address
 58 *  gfn - guest frame number
 59 *  hva - host virtual address
 60 *  hpa - host physical address
 61 *  hfn - host frame number
 62 */
 63
 64typedef unsigned long  gva_t;
 65typedef u64            gpa_t;
 66typedef u64            gfn_t;
 67
 68#define INVALID_GPA	(~(gpa_t)0)
 69
 70typedef unsigned long  hva_t;
 71typedef u64            hpa_t;
 72typedef u64            hfn_t;
 73
 74typedef hfn_t kvm_pfn_t;
 75
 76struct gfn_to_hva_cache {
 77	u64 generation;
 78	gpa_t gpa;
 79	unsigned long hva;
 80	unsigned long len;
 81	struct kvm_memory_slot *memslot;
 82};
 83
 84struct gfn_to_pfn_cache {
 85	u64 generation;
 86	gpa_t gpa;
 87	unsigned long uhva;
 88	struct kvm_memory_slot *memslot;
 89	struct kvm *kvm;
 90	struct list_head list;
 91	rwlock_t lock;
 92	struct mutex refresh_lock;
 93	void *khva;
 94	kvm_pfn_t pfn;
 95	bool active;
 96	bool valid;
 97};
 98
 99#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
100/*
101 * Memory caches are used to preallocate memory ahead of various MMU flows,
102 * e.g. page fault handlers.  Gracefully handling allocation failures deep in
103 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
104 * holding MMU locks.  Note, these caches act more like prefetch buffers than
105 * classical caches, i.e. objects are not returned to the cache on being freed.
106 *
107 * The @capacity field and @objects array are lazily initialized when the cache
108 * is topped up (__kvm_mmu_topup_memory_cache()).
109 */
110struct kvm_mmu_memory_cache {
111	gfp_t gfp_zero;
112	gfp_t gfp_custom;
113	u64 init_value;
114	struct kmem_cache *kmem_cache;
115	int capacity;
116	int nobjs;
117	void **objects;
118};
119#endif
120
121#define HALT_POLL_HIST_COUNT			32
122
123struct kvm_vm_stat_generic {
124	u64 remote_tlb_flush;
125	u64 remote_tlb_flush_requests;
126};
127
128struct kvm_vcpu_stat_generic {
129	u64 halt_successful_poll;
130	u64 halt_attempted_poll;
131	u64 halt_poll_invalid;
132	u64 halt_wakeup;
133	u64 halt_poll_success_ns;
134	u64 halt_poll_fail_ns;
135	u64 halt_wait_ns;
136	u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
137	u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
138	u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
139	u64 blocking;
140};
141
142#define KVM_STATS_NAME_SIZE	48
143#endif /* !__ASSEMBLER__ */
144
145#endif /* __KVM_TYPES_H__ */