diff options
Diffstat (limited to 'arch/x86/kvm/page_track.c')
| -rw-r--r-- | arch/x86/kvm/page_track.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kvm/page_track.c b/arch/x86/kvm/page_track.c index 11f76436f74f..b431539c3714 100644 --- a/arch/x86/kvm/page_track.c +++ b/arch/x86/kvm/page_track.c @@ -142,12 +142,17 @@ void kvm_slot_page_track_remove_page(struct kvm *kvm, bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, enum kvm_page_track_mode mode) { - struct kvm_memory_slot *slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); - int index = gfn_to_index(gfn, slot->base_gfn, PT_PAGE_TABLE_LEVEL); + struct kvm_memory_slot *slot; + int index; if (WARN_ON(!page_track_mode_is_valid(mode))) return false; + slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); + if (!slot) + return false; + + index = gfn_to_index(gfn, slot->base_gfn, PT_PAGE_TABLE_LEVEL); return !!ACCESS_ONCE(slot->arch.gfn_track[mode][index]); } |