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authorAvi Kivity <avi@qumranet.com>2007-07-25 09:22:12 +0300
committerAvi Kivity <avi@qumranet.com>2007-07-25 14:31:13 +0300
commit4c981b43d7ec18818754bf85b829865abd0ce340 (patch)
tree2db7c22e03393e32ea4cdb0d55e5d13c71ed2ef2 /drivers/kvm
parent7cfa4b0a43286b1da3afa4f5f99d52e65a8f30fc (diff)
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 <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm')
-rw-r--r--drivers/kvm/kvm_main.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index a8d8db8e3cc..96856097d15 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");
}
}