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 }; 78 79 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE 80 /* 81 * Memory caches are used to preallocate memory ahead of various MMU flows, 82 * e.g. page fault handlers. Gracefully handling allocation failures deep in 83 * MMU flows is problematic, as is triggering reclaim, I/O, etc... while 84 * holding MMU locks. Note, these caches act more like prefetch buffers than 85 * classical caches, i.e. objects are not returned to the cache on being freed. 86 */ 87 struct kvm_mmu_memory_cache { 88 int nobjs; 89 gfp_t gfp_zero; 90 struct kmem_cache *kmem_cache; 91 void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE]; 92 }; 93 #endif 94 95 #define HALT_POLL_HIST_COUNT 32 96 97 struct kvm_vm_stat_generic { 98 u64 remote_tlb_flush; 99 u64 remote_tlb_flush_requests; 100 }; 101 102 struct kvm_vcpu_stat_generic { 103 u64 halt_successful_poll; 104 u64 halt_attempted_poll; 105 u64 halt_poll_invalid; 106 u64 halt_wakeup; 107 u64 halt_poll_success_ns; 108 u64 halt_poll_fail_ns; 109 u64 halt_wait_ns; 110 u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT]; 111 u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT]; 112 u64 halt_wait_hist[HALT_POLL_HIST_COUNT]; 113 u64 blocking; 114 }; 115 116 #define KVM_STATS_NAME_SIZE 48 117 118 #endif /* __KVM_TYPES_H__ */ 119