Commit a81aba14 authored Aug 21, 2012 by Avi Kivity Committed by Marcelo Tosatti Aug 27, 2012

KVM: VMX: Ignore segment G and D bits when considering whether we can virtualize



We will enter the guest with G and D cleared; as real hardware ignores D in
real mode, and G is taken care of by the limit test, we allow more code to
run in vm86 mode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

parent ce566803

arch/x86/kvm/vmx.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3320,7 +3320,7 @@ static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
		return false;
		if (var.limit < 0xffff)
		return false;
		if ((ar \| (3 << AR_DPL_SHIFT)) != 0xf3)
		if (((ar \| (3 << AR_DPL_SHIFT)) & ~(AR_G_MASK \| AR_DB_MASK)) != 0xf3)
		return false;

		return true;