Xiao Guangrong | 21ebbed | 2016-02-24 17:51:09 +0800 | [diff] [blame] | 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 | |
Xiao Guangrong | 0eb05bf | 2016-02-24 17:51:13 +0800 | [diff] [blame] | 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); |
Paolo Bonzini | 3e8c6bd | 2017-03-27 17:53:50 +0200 | [diff] [blame] | 38 | void kvm_page_track_cleanup(struct kvm *kvm); |
Xiao Guangrong | 0eb05bf | 2016-02-24 17:51:13 +0800 | [diff] [blame] | 39 | |
Xiao Guangrong | 21ebbed | 2016-02-24 17:51:09 +0800 | [diff] [blame] | 40 | void kvm_page_track_free_memslot(struct kvm_memory_slot *free, |
| 41 | struct kvm_memory_slot *dont); |
| 42 | int kvm_page_track_create_memslot(struct kvm_memory_slot *slot, |
| 43 | unsigned long npages); |
Xiao Guangrong | f29d4d7 | 2016-02-24 17:51:10 +0800 | [diff] [blame] | 44 | |
| 45 | void kvm_slot_page_track_add_page(struct kvm *kvm, |
| 46 | struct kvm_memory_slot *slot, gfn_t gfn, |
| 47 | enum kvm_page_track_mode mode); |
| 48 | void kvm_slot_page_track_remove_page(struct kvm *kvm, |
| 49 | struct kvm_memory_slot *slot, gfn_t gfn, |
| 50 | enum kvm_page_track_mode mode); |
Xiao Guangrong | 3d0c27a | 2016-02-24 17:51:11 +0800 | [diff] [blame] | 51 | bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, |
| 52 | enum kvm_page_track_mode mode); |
Xiao Guangrong | 0eb05bf | 2016-02-24 17:51:13 +0800 | [diff] [blame] | 53 | |
| 54 | void |
| 55 | kvm_page_track_register_notifier(struct kvm *kvm, |
| 56 | struct kvm_page_track_notifier_node *n); |
| 57 | void |
| 58 | kvm_page_track_unregister_notifier(struct kvm *kvm, |
| 59 | struct kvm_page_track_notifier_node *n); |
| 60 | void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, |
| 61 | int bytes); |
Xiao Guangrong | 21ebbed | 2016-02-24 17:51:09 +0800 | [diff] [blame] | 62 | #endif |