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authorAvi Kivity <avi@redhat.com>2009-08-27 13:37:06 +0300
committerAvi Kivity <avi@redhat.com>2009-09-10 10:46:56 +0300
commit60f24784a92c25c269a5e741a8ce8ff63e887be8 (patch)
treee14483c4f507bad1756b8ce82f2f73b0190b026f /arch
parent5dadbfd64724c41716d4fc82df6f01b023d5b15d (diff)
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 <avi@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/mmu.c3
1 files changed, 3 insertions, 0 deletions
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);