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_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/bits.h>
  22 #include <linux/mutex.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock_types.h>
  25
  26 #include <asm/kvm_types.h>
  27
  28 /*
  29  * Address types:
  30  *
  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
  37  */
  38
  39 typedef unsigned long  gva_t;
  40 typedef u64            gpa_t;
  41 typedef u64            gfn_t;
  42
  43 #define GPA_INVALID     (~(gpa_t)0)
  44
  45 typedef unsigned long  hva_t;
  46 typedef u64            hpa_t;
  47 typedef u64            hfn_t;
  48
  49 typedef hfn_t kvm_pfn_t;
  50
  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,
  55 };
  56
  57 struct gfn_to_hva_cache {
  58         u64 generation;
  59         gpa_t gpa;
  60         unsigned long hva;
  61         unsigned long len;
  62         struct kvm_memory_slot *memslot;
  63 };
  64
  65 struct gfn_to_pfn_cache {
  66         u64 generation;
  67         gpa_t gpa;
  68         unsigned long uhva;
  69         struct kvm_memory_slot *memslot;
  70         struct kvm_vcpu *vcpu;
  71         struct list_head list;
  72         rwlock_t lock;
  73         struct mutex refresh_lock;
  74         void *khva;
  75         kvm_pfn_t pfn;
  76         enum pfn_cache_usage usage;
  77         bool active;
  78         bool valid;
  79 };
  80
  81 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
  82 /*
  83  * Memory caches are used to preallocate memory ahead of various MMU flows,
  84  * e.g. page fault handlers.  Gracefully handling allocation failures deep in
  85  * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
  86  * holding MMU locks.  Note, these caches act more like prefetch buffers than
  87  * classical caches, i.e. objects are not returned to the cache on being freed.
  88  */
  89 struct kvm_mmu_memory_cache {
  90         int nobjs;
  91         gfp_t gfp_zero;
  92         struct kmem_cache *kmem_cache;
  93         void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
  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__ */