arch/x86/kvm/mmu/page_track.h

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