From 4c981b43d7ec18818754bf85b829865abd0ce340 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Wed, 25 Jul 2007 09:22:12 +0300 Subject: [PATCH] KVM: Fix removal of nx capability from guest cpuid Testing the wrong bit caused kvm not to disable nx on the guest when it is disabled on the host (an mmu optimization relies on the nx bits being the same in the guest and host). This allows Windows to boot when nx is disabled on te host (e.g. when host pae is disabled). Signed-off-by: Avi Kivity --- drivers/kvm/kvm_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index a8d8db8e3c..96856097d1 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2432,9 +2432,9 @@ static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) break; } } - if (entry && (entry->edx & EFER_NX) && !(efer & EFER_NX)) { + if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { entry->edx &= ~(1 << 20); - printk(KERN_INFO ": guest NX capability removed\n"); + printk(KERN_INFO "kvm: guest NX capability removed\n"); } } -- 2.39.5