121ebbedaSXiao Guangrong #ifndef _ASM_X86_KVM_PAGE_TRACK_H 221ebbedaSXiao Guangrong #define _ASM_X86_KVM_PAGE_TRACK_H 321ebbedaSXiao Guangrong 421ebbedaSXiao Guangrong enum kvm_page_track_mode { 521ebbedaSXiao Guangrong KVM_PAGE_TRACK_WRITE, 621ebbedaSXiao Guangrong KVM_PAGE_TRACK_MAX, 721ebbedaSXiao Guangrong }; 821ebbedaSXiao Guangrong 90eb05bf2SXiao Guangrong /* 100eb05bf2SXiao Guangrong * The notifier represented by @kvm_page_track_notifier_node is linked into 110eb05bf2SXiao Guangrong * the head which will be notified when guest is triggering the track event. 120eb05bf2SXiao Guangrong * 130eb05bf2SXiao Guangrong * Write access on the head is protected by kvm->mmu_lock, read access 140eb05bf2SXiao Guangrong * is protected by track_srcu. 150eb05bf2SXiao Guangrong */ 160eb05bf2SXiao Guangrong struct kvm_page_track_notifier_head { 170eb05bf2SXiao Guangrong struct srcu_struct track_srcu; 180eb05bf2SXiao Guangrong struct hlist_head track_notifier_list; 190eb05bf2SXiao Guangrong }; 200eb05bf2SXiao Guangrong 210eb05bf2SXiao Guangrong struct kvm_page_track_notifier_node { 220eb05bf2SXiao Guangrong struct hlist_node node; 230eb05bf2SXiao Guangrong 240eb05bf2SXiao Guangrong /* 250eb05bf2SXiao Guangrong * It is called when guest is writing the write-tracked page 260eb05bf2SXiao Guangrong * and write emulation is finished at that time. 270eb05bf2SXiao Guangrong * 280eb05bf2SXiao Guangrong * @vcpu: the vcpu where the write access happened. 290eb05bf2SXiao Guangrong * @gpa: the physical address written by guest. 300eb05bf2SXiao Guangrong * @new: the data was written to the address. 310eb05bf2SXiao Guangrong * @bytes: the written length. 32d126363dSJike Song * @node: this node 330eb05bf2SXiao Guangrong */ 340eb05bf2SXiao Guangrong void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, 35d126363dSJike Song int bytes, struct kvm_page_track_notifier_node *node); 36ae7cd873SXiaoguang Chen /* 37ae7cd873SXiaoguang Chen * It is called when memory slot is being moved or removed 38ae7cd873SXiaoguang Chen * users can drop write-protection for the pages in that memory slot 39ae7cd873SXiaoguang Chen * 40ae7cd873SXiaoguang Chen * @kvm: the kvm where memory slot being moved or removed 41ae7cd873SXiaoguang Chen * @slot: the memory slot being moved or removed 42d126363dSJike Song * @node: this node 43ae7cd873SXiaoguang Chen */ 44d126363dSJike Song void (*track_flush_slot)(struct kvm *kvm, struct kvm_memory_slot *slot, 45d126363dSJike Song struct kvm_page_track_notifier_node *node); 460eb05bf2SXiao Guangrong }; 470eb05bf2SXiao Guangrong 480eb05bf2SXiao Guangrong void kvm_page_track_init(struct kvm *kvm); 490eb05bf2SXiao Guangrong 5021ebbedaSXiao Guangrong void kvm_page_track_free_memslot(struct kvm_memory_slot *free, 5121ebbedaSXiao Guangrong struct kvm_memory_slot *dont); 5221ebbedaSXiao Guangrong int kvm_page_track_create_memslot(struct kvm_memory_slot *slot, 5321ebbedaSXiao Guangrong unsigned long npages); 54f29d4d78SXiao Guangrong 55f29d4d78SXiao Guangrong void kvm_slot_page_track_add_page(struct kvm *kvm, 56f29d4d78SXiao Guangrong struct kvm_memory_slot *slot, gfn_t gfn, 57f29d4d78SXiao Guangrong enum kvm_page_track_mode mode); 58f29d4d78SXiao Guangrong void kvm_slot_page_track_remove_page(struct kvm *kvm, 59f29d4d78SXiao Guangrong struct kvm_memory_slot *slot, gfn_t gfn, 60f29d4d78SXiao Guangrong enum kvm_page_track_mode mode); 613d0c27adSXiao Guangrong bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, 623d0c27adSXiao Guangrong enum kvm_page_track_mode mode); 630eb05bf2SXiao Guangrong 640eb05bf2SXiao Guangrong void 650eb05bf2SXiao Guangrong kvm_page_track_register_notifier(struct kvm *kvm, 660eb05bf2SXiao Guangrong struct kvm_page_track_notifier_node *n); 670eb05bf2SXiao Guangrong void 680eb05bf2SXiao Guangrong kvm_page_track_unregister_notifier(struct kvm *kvm, 690eb05bf2SXiao Guangrong struct kvm_page_track_notifier_node *n); 700eb05bf2SXiao Guangrong void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, 710eb05bf2SXiao Guangrong int bytes); 72ae7cd873SXiaoguang Chen void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot); 7321ebbedaSXiao Guangrong #endif 74