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21ebbeda XG |
1 | #ifndef _ASM_X86_KVM_PAGE_TRACK_H |
2 | #define _ASM_X86_KVM_PAGE_TRACK_H | |
3 | ||
4 | enum kvm_page_track_mode { | |
5 | KVM_PAGE_TRACK_WRITE, | |
6 | KVM_PAGE_TRACK_MAX, | |
7 | }; | |
8 | ||
0eb05bf2 XG |
9 | /* |
10 | * The notifier represented by @kvm_page_track_notifier_node is linked into | |
11 | * the head which will be notified when guest is triggering the track event. | |
12 | * | |
13 | * Write access on the head is protected by kvm->mmu_lock, read access | |
14 | * is protected by track_srcu. | |
15 | */ | |
16 | struct kvm_page_track_notifier_head { | |
17 | struct srcu_struct track_srcu; | |
18 | struct hlist_head track_notifier_list; | |
19 | }; | |
20 | ||
21 | struct kvm_page_track_notifier_node { | |
22 | struct hlist_node node; | |
23 | ||
24 | /* | |
25 | * It is called when guest is writing the write-tracked page | |
26 | * and write emulation is finished at that time. | |
27 | * | |
28 | * @vcpu: the vcpu where the write access happened. | |
29 | * @gpa: the physical address written by guest. | |
30 | * @new: the data was written to the address. | |
31 | * @bytes: the written length. | |
32 | */ | |
33 | void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, | |
34 | int bytes); | |
35 | }; | |
36 | ||
37 | void kvm_page_track_init(struct kvm *kvm); | |
38 | ||
21ebbeda XG |
39 | void kvm_page_track_free_memslot(struct kvm_memory_slot *free, |
40 | struct kvm_memory_slot *dont); | |
41 | int kvm_page_track_create_memslot(struct kvm_memory_slot *slot, | |
42 | unsigned long npages); | |
f29d4d78 XG |
43 | |
44 | void kvm_slot_page_track_add_page(struct kvm *kvm, | |
45 | struct kvm_memory_slot *slot, gfn_t gfn, | |
46 | enum kvm_page_track_mode mode); | |
47 | void kvm_slot_page_track_remove_page(struct kvm *kvm, | |
48 | struct kvm_memory_slot *slot, gfn_t gfn, | |
49 | enum kvm_page_track_mode mode); | |
3d0c27ad XG |
50 | bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, |
51 | enum kvm_page_track_mode mode); | |
0eb05bf2 XG |
52 | |
53 | void | |
54 | kvm_page_track_register_notifier(struct kvm *kvm, | |
55 | struct kvm_page_track_notifier_node *n); | |
56 | void | |
57 | kvm_page_track_unregister_notifier(struct kvm *kvm, | |
58 | struct kvm_page_track_notifier_node *n); | |
59 | void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, | |
60 | int bytes); | |
21ebbeda | 61 | #endif |