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 * The @capacity field and @objects array are lazily initialized when the cache 90 * is topped up (__kvm_mmu_topup_memory_cache()). 91 */ 92 struct kvm_mmu_memory_cache { 93 int nobjs; 94 gfp_t gfp_zero; 95 gfp_t gfp_custom; 96 struct kmem_cache *kmem_cache; 97 int capacity; 98 void **objects; 99 }; 100 #endif 101 102 #define HALT_POLL_HIST_COUNT 32 103 104 struct kvm_vm_stat_generic { 105 u64 remote_tlb_flush; 106 u64 remote_tlb_flush_requests; 107 }; 108 109 struct kvm_vcpu_stat_generic { 110 u64 halt_successful_poll; 111 u64 halt_attempted_poll; 112 u64 halt_poll_invalid; 113 u64 halt_wakeup; 114 u64 halt_poll_success_ns; 115 u64 halt_poll_fail_ns; 116 u64 halt_wait_ns; 117 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT]; 118 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT]; 119 u64 halt_wait_hist[HALT_POLL_HIST_COUNT]; 120 u64 blocking; 121 }; 122 123 #define KVM_STATS_NAME_SIZE 48 124 125 #endif /* __KVM_TYPES_H__ */ 126