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authorLan Tianyu <Tianyu.Lan@microsoft.com>2018-12-06 21:21:11 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2018-12-21 11:28:42 +0100
commit0cf853c5e238edf503ebda2fe541e6f4a3d5bd40 (patch)
treec0eae846bf3caf92069a7f90b6e7162d3b253d03 /virt/kvm/kvm_main.c
parent748c0e312fce983bd7854b369b192e24dce90878 (diff)
downloadlinux-0cf853c5e238edf503ebda2fe541e6f4a3d5bd40.tar.gz
KVM/MMU: Move tlb flush in kvm_set_pte_rmapp() to kvm_mmu_notifier_change_pte()
This patch is to move tlb flush in kvm_set_pte_rmapp() to kvm_mmu_notifier_change_pte() in order to avoid redundant tlb flush. Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index f90ceab3840e..cf7cc0554094 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -354,7 +354,10 @@ static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
idx = srcu_read_lock(&kvm->srcu);
spin_lock(&kvm->mmu_lock);
kvm->mmu_notifier_seq++;
- kvm_set_spte_hva(kvm, address, pte);
+
+ if (kvm_set_spte_hva(kvm, address, pte))
+ kvm_flush_remote_tlbs(kvm);
+
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
}