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/types.h>
  23 #include <linux/spinlock_types.h>
  24
  25 #include <asm/kvm_types.h>
  26
  27 /*
  28  * Address types:
  29  *
  30  *  gva - guest virtual address
  31  *  gpa - guest physical address
  32  *  gfn - guest frame number
  33  *  hva - host virtual address
  34  *  hpa - host physical address
  35  *  hfn - host frame number
  36  */
  37
  38 typedef unsigned long  gva_t;
  39 typedef u64            gpa_t;
  40 typedef u64            gfn_t;
  41
  42 #define GPA_INVALID     (~(gpa_t)0)
  43
  44 typedef unsigned long  hva_t;
  45 typedef u64            hpa_t;
  46 typedef u64            hfn_t;
  47
  48 typedef hfn_t kvm_pfn_t;
  49
  50 enum pfn_cache_usage {
  51         KVM_GUEST_USES_PFN = BIT(0),
  52         KVM_HOST_USES_PFN  = BIT(1),
  53         KVM_GUEST_AND_HOST_USE_PFN = KVM_GUEST_USES_PFN | KVM_HOST_USES_PFN,
  54 };
  55
  56 struct gfn_to_hva_cache {
  57         u64 generation;
  58         gpa_t gpa;
  59         unsigned long hva;
  60         unsigned long len;
  61         struct kvm_memory_slot *memslot;
  62 };
  63
  64 struct gfn_to_pfn_cache {
  65         u64 generation;
  66         gpa_t gpa;
  67         unsigned long uhva;
  68         struct kvm_memory_slot *memslot;
  69         struct kvm_vcpu *vcpu;
  70         struct list_head list;
  71         rwlock_t lock;
  72         void *khva;
  73         kvm_pfn_t pfn;
  74         enum pfn_cache_usage usage;
  75         bool active;
  76         bool valid;
  77         bool dirty;
  78 };
  79
  80 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
  81 /*
  82  * Memory caches are used to preallocate memory ahead of various MMU flows,
  83  * e.g. page fault handlers.  Gracefully handling allocation failures deep in
  84  * MMU flows is problematic, as is triggering reclaim, I/O, etc... while
  85  * holding MMU locks.  Note, these caches act more like prefetch buffers than
  86  * classical caches, i.e. objects are not returned to the cache on being freed.
  87  */
  88 struct kvm_mmu_memory_cache {
  89         int nobjs;
  90         gfp_t gfp_zero;
  91         struct kmem_cache *kmem_cache;
  92         void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
  93 };
  94 #endif
  95
  96 #define HALT_POLL_HIST_COUNT                    32
  97
  98 struct kvm_vm_stat_generic {
  99         u64 remote_tlb_flush;
 100         u64 remote_tlb_flush_requests;
 101 };
 102
 103 struct kvm_vcpu_stat_generic {
 104         u64 halt_successful_poll;
 105         u64 halt_attempted_poll;
 106         u64 halt_poll_invalid;
 107         u64 halt_wakeup;
 108         u64 halt_poll_success_ns;
 109         u64 halt_poll_fail_ns;
 110         u64 halt_wait_ns;
 111         u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
 112         u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
 113         u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
 114         u64 blocking;
 115 };
 116
 117 #define KVM_STATS_NAME_SIZE     48
 118
 119 #endif /* __KVM_TYPES_H__ */