KVM/MMU: Flush tlb directly in kvm_set_pte_rmapp()

This patch is to flush tlb directly in kvm_set_pte_rmapp()
function when Hyper-V remote TLB flush is available, returning 0
so that kvm_mmu_notifier_change_pte() does not flush again.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5a046f93a41a..fd61d715ebd6 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1776,6 +1776,11 @@ restart:
                 }
         }
 
+        if (need_flush && kvm_available_flush_tlb_with_range()) {
+                kvm_flush_remote_tlbs_with_address(kvm, gfn, 1);
+                return 0;
+        }
+
         return need_flush;
 }