From 60f24784a92c25c269a5e741a8ce8ff63e887be8 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Thu, 27 Aug 2009 13:37:06 +0300 Subject: KVM: Optimize kvm_mmu_unprotect_page_virt() for tdp We know no pages are protected, so we can short-circuit the whole thing (including fairly nasty guest memory accesses). Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 6f38178af92..eca41ae9f45 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2694,6 +2694,9 @@ int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva) gpa_t gpa; int r; + if (tdp_enabled) + return 0; + gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gva); spin_lock(&vcpu->kvm->mmu_lock); -- cgit v1.2.3-70-g09d2