1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __KVM_X86_PAGE_TRACK_H 3 #define __KVM_X86_PAGE_TRACK_H 4 5 #include <linux/kvm_host.h> 6 7 #include <asm/kvm_page_track.h> 8 9 10 bool kvm_page_track_write_tracking_enabled(struct kvm *kvm); 11 int kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot); 12 13 void kvm_page_track_free_memslot(struct kvm_memory_slot *slot); 14 int kvm_page_track_create_memslot(struct kvm *kvm, 15 struct kvm_memory_slot *slot, 16 unsigned long npages); 17 18 void __kvm_write_track_add_gfn(struct kvm *kvm, struct kvm_memory_slot *slot, 19 gfn_t gfn); 20 void __kvm_write_track_remove_gfn(struct kvm *kvm, 21 struct kvm_memory_slot *slot, gfn_t gfn); 22 23 bool kvm_gfn_is_write_tracked(struct kvm *kvm, 24 const struct kvm_memory_slot *slot, gfn_t gfn); 25 26 #ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING 27 int kvm_page_track_init(struct kvm *kvm); 28 void kvm_page_track_cleanup(struct kvm *kvm); 29 30 void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa, const u8 *new, int bytes); 31 void kvm_page_track_delete_slot(struct kvm *kvm, struct kvm_memory_slot *slot); 32 33 static inline bool kvm_page_track_has_external_user(struct kvm *kvm) 34 { 35 return !hlist_empty(&kvm->arch.track_notifier_head.track_notifier_list); 36 } 37 #else 38 static inline int kvm_page_track_init(struct kvm *kvm) { return 0; } 39 static inline void kvm_page_track_cleanup(struct kvm *kvm) { } 40 41 static inline void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa, 42 const u8 *new, int bytes) { } 43 static inline void kvm_page_track_delete_slot(struct kvm *kvm, 44 struct kvm_memory_slot *slot) { } 45 46 static inline bool kvm_page_track_has_external_user(struct kvm *kvm) { return false; } 47 48 #endif /* CONFIG_KVM_EXTERNAL_WRITE_TRACKING */ 49 50 static inline void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, 51 const u8 *new, int bytes) 52 { 53 __kvm_page_track_write(vcpu->kvm, gpa, new, bytes); 54 55 kvm_mmu_track_write(vcpu, gpa, new, bytes); 56 } 57 58 #endif /* __KVM_X86_PAGE_TRACK_H */ 59