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 10bool kvm_page_track_write_tracking_enabled(struct kvm *kvm); 11int kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot); 12 13void kvm_page_track_free_memslot(struct kvm_memory_slot *slot); 14int kvm_page_track_create_memslot(struct kvm *kvm, 15 struct kvm_memory_slot *slot, 16 unsigned long npages); 17 18void __kvm_write_track_add_gfn(struct kvm *kvm, struct kvm_memory_slot *slot, 19 gfn_t gfn); 20void __kvm_write_track_remove_gfn(struct kvm *kvm, 21 struct kvm_memory_slot *slot, gfn_t gfn); 22 23bool 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 27int kvm_page_track_init(struct kvm *kvm); 28void kvm_page_track_cleanup(struct kvm *kvm); 29 30void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa, const u8 *new, int bytes); 31void kvm_page_track_delete_slot(struct kvm *kvm, struct kvm_memory_slot *slot); 32 33static 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 38static inline int kvm_page_track_init(struct kvm *kvm) { return 0; } 39static inline void kvm_page_track_cleanup(struct kvm *kvm) { } 40 41static inline void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa, 42 const u8 *new, int bytes) { } 43static inline void kvm_page_track_delete_slot(struct kvm *kvm, 44 struct kvm_memory_slot *slot) { } 45 46static inline bool kvm_page_track_has_external_user(struct kvm *kvm) { return false; } 47 48#endif /* CONFIG_KVM_EXTERNAL_WRITE_TRACKING */ 49 50static 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