include/linux/kvm_types.h

   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_gfn_range;
  10 struct kvm_interrupt;
  11 struct kvm_irq_routing_table;
  12 struct kvm_memory_slot;
  13 struct kvm_one_reg;
  14 struct kvm_run;
  15 struct kvm_userspace_memory_region;
  16 struct kvm_vcpu;
  17 struct kvm_vcpu_init;
  18 struct kvm_memslots;
  19
  20 enum kvm_mr_change;
  21
  22 #include <linux/bits.h>
  23 #include <linux/mutex.h>
  24 #include <linux/types.h>
  25 #include <linux/spinlock_types.h>
  26
  27 #include <asm/kvm_types.h>
  28
  29 /*
  30  * Address types:
  31  *
  32  *  gva - guest virtual address
  33  *  gpa - guest physical address
  34  *  gfn - guest frame number
  35  *  hva - host virtual address
  36  *  hpa - host physical address
  37  *  hfn - host frame number
  38  */
  39
  40 typedef unsigned long  gva_t;
  41 typedef u64            gpa_t;
  42 typedef u64            gfn_t;
  43
  44 #define INVALID_GPA     (~(gpa_t)0)
  45
  46 typedef unsigned long  hva_t;
  47 typedef u64            hpa_t;
  48 typedef u64            hfn_t;
  49
  50 typedef hfn_t kvm_pfn_t;
  51
  52 struct gfn_to_hva_cache {
  53         u64 generation;
  54         gpa_t gpa;
  55         unsigned long hva;
  56         unsigned long len;
  57         struct kvm_memory_slot *memslot;
  58 };
  59
  60 struct gfn_to_pfn_cache {
  61         u64 generation;
  62         gpa_t gpa;
  63         unsigned long uhva;
  64         struct kvm_memory_slot *memslot;
  65         struct kvm *kvm;
  66         struct list_head list;
  67         rwlock_t lock;
  68         struct mutex refresh_lock;
  69         void *khva;
  70         kvm_pfn_t pfn;
  71         bool active;
  72         bool valid;
  73 };
  74
  75 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
  76 /*
  77  * Memory caches are used to preallocate memory ahead of various MMU flows,
  78  * e.g. page fault handlers.  Gracefully handling allocation failures deep in
  79  * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
  80  * holding MMU locks.  Note, these caches act more like prefetch buffers than
  81  * classical caches, i.e. objects are not returned to the cache on being freed.
  82  *
  83  * The @capacity field and @objects array are lazily initialized when the cache
  84  * is topped up (__kvm_mmu_topup_memory_cache()).
  85  */
  86 struct kvm_mmu_memory_cache {
  87         gfp_t gfp_zero;
  88         gfp_t gfp_custom;
  89         u64 init_value;
  90         struct kmem_cache *kmem_cache;
  91         int capacity;
  92         int nobjs;
  93         void **objects;
  94 };
  95 #endif
  96
  97 #define HALT_POLL_HIST_COUNT                    32
  98
  99 struct kvm_vm_stat_generic {
 100         u64 remote_tlb_flush;
 101         u64 remote_tlb_flush_requests;
 102 };
 103
 104 struct kvm_vcpu_stat_generic {
 105         u64 halt_successful_poll;
 106         u64 halt_attempted_poll;
 107         u64 halt_poll_invalid;
 108         u64 halt_wakeup;
 109         u64 halt_poll_success_ns;
 110         u64 halt_poll_fail_ns;
 111         u64 halt_wait_ns;
 112         u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
 113         u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
 114         u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
 115         u64 blocking;
 116 };
 117
 118 #define KVM_STATS_NAME_SIZE     48
 119
 120 #endif /* __KVM_TYPES_H__ */