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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
21ebbeda XG |
2 | #ifndef _ASM_X86_KVM_PAGE_TRACK_H |
3 | #define _ASM_X86_KVM_PAGE_TRACK_H | |
4 | ||
5 | enum kvm_page_track_mode { | |
6 | KVM_PAGE_TRACK_WRITE, | |
7 | KVM_PAGE_TRACK_MAX, | |
8 | }; | |
9 | ||
0eb05bf2 XG |
10 | /* |
11 | * The notifier represented by @kvm_page_track_notifier_node is linked into | |
12 | * the head which will be notified when guest is triggering the track event. | |
13 | * | |
14 | * Write access on the head is protected by kvm->mmu_lock, read access | |
15 | * is protected by track_srcu. | |
16 | */ | |
17 | struct kvm_page_track_notifier_head { | |
18 | struct srcu_struct track_srcu; | |
19 | struct hlist_head track_notifier_list; | |
20 | }; | |
21 | ||
22 | struct kvm_page_track_notifier_node { | |
23 | struct hlist_node node; | |
24 | ||
25 | /* | |
26 | * It is called when guest is writing the write-tracked page | |
27 | * and write emulation is finished at that time. | |
28 | * | |
29 | * @vcpu: the vcpu where the write access happened. | |
30 | * @gpa: the physical address written by guest. | |
31 | * @new: the data was written to the address. | |
32 | * @bytes: the written length. | |
d126363d | 33 | * @node: this node |
0eb05bf2 XG |
34 | */ |
35 | void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, | |
d126363d | 36 | int bytes, struct kvm_page_track_notifier_node *node); |
ae7cd873 XC |
37 | /* |
38 | * It is called when memory slot is being moved or removed | |
39 | * users can drop write-protection for the pages in that memory slot | |
40 | * | |
41 | * @kvm: the kvm where memory slot being moved or removed | |
42 | * @slot: the memory slot being moved or removed | |
d126363d | 43 | * @node: this node |
ae7cd873 | 44 | */ |
d126363d JS |
45 | void (*track_flush_slot)(struct kvm *kvm, struct kvm_memory_slot *slot, |
46 | struct kvm_page_track_notifier_node *node); | |
0eb05bf2 XG |
47 | }; |
48 | ||
49 | void kvm_page_track_init(struct kvm *kvm); | |
2beb6dad | 50 | void kvm_page_track_cleanup(struct kvm *kvm); |
0eb05bf2 | 51 | |
21ebbeda XG |
52 | void kvm_page_track_free_memslot(struct kvm_memory_slot *free, |
53 | struct kvm_memory_slot *dont); | |
54 | int kvm_page_track_create_memslot(struct kvm_memory_slot *slot, | |
55 | unsigned long npages); | |
f29d4d78 XG |
56 | |
57 | void kvm_slot_page_track_add_page(struct kvm *kvm, | |
58 | struct kvm_memory_slot *slot, gfn_t gfn, | |
59 | enum kvm_page_track_mode mode); | |
60 | void kvm_slot_page_track_remove_page(struct kvm *kvm, | |
61 | struct kvm_memory_slot *slot, gfn_t gfn, | |
62 | enum kvm_page_track_mode mode); | |
3d0c27ad XG |
63 | bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, |
64 | enum kvm_page_track_mode mode); | |
0eb05bf2 XG |
65 | |
66 | void | |
67 | kvm_page_track_register_notifier(struct kvm *kvm, | |
68 | struct kvm_page_track_notifier_node *n); | |
69 | void | |
70 | kvm_page_track_unregister_notifier(struct kvm *kvm, | |
71 | struct kvm_page_track_notifier_node *n); | |
72 | void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, | |
73 | int bytes); | |
ae7cd873 | 74 | void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot); |
21ebbeda | 75 | #endif |