KVM: MMU: Add drop_large_spte() helper

To clarify spte fetching code, move large spte handling into a helper.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5a6019a534a3..b75d6cb44ab6 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1492,6 +1492,14 @@ static void link_shadow_page(u64 *sptep, struct kvm_mmu_page *sp)
         __set_spte(sptep, spte);
 }
 
+static void drop_large_spte(struct kvm_vcpu *vcpu, u64 *sptep)
+{
+        if (is_large_pte(*sptep)) {
+                drop_spte(vcpu->kvm, sptep, shadow_trap_nonpresent_pte);
+                kvm_flush_remote_tlbs(vcpu->kvm);
+        }
+}
+
 static void kvm_mmu_page_unlink_children(struct kvm *kvm,
                                          struct kvm_mmu_page *sp)
 {