Commit 432bd6cb authored Jan 31, 2007 by Avi Kivity Committed by Linus Torvalds Feb 01, 2007

[PATCH] KVM: fix lockup on 32-bit intel hosts with nx disabled in the bios



Intel hosts, without long mode, and with nx support disabled in the bios
have an efer that is readable but not writable.  This causes a lockup on
switch to guest mode (even though it should exit with reason 34 according
to the documentation).

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 6a4c24ec

drivers/kvm/vmx.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1116,6 +1116,8 @@ static int vmx_vcpu_setup(struct kvm_vcpu *vcpu)

		if (rdmsr_safe(index, &data_low, &data_high) < 0)
		continue;
		if (wrmsr_safe(index, data_low, data_high) < 0)
		continue;
		data = data_low \| ((u64)data_high << 32);
		vcpu->host_msrs[j].index = index;
		vcpu->host_msrs[j].reserved = 0;

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