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