From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 9/9] KVM: x86: smsw emulation is incorrect in 64-bit mode
Date: Thu, 05 Jun 2014 08:04:22 -0700
Message-ID: <539086F6.8000004@zytor.com>
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Cc: Nadav Amit <namit@cs.technion.ac.il>, gleb@kernel.org,
	tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org
To: Nadav Amit <nadav.amit@gmail.com>,
	Paolo Bonzini <pbonzini@redhat.com>
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On 06/05/2014 08:02 AM, Nadav Amit wrote:
>> I'm sorry, I'm missing the place where 64-bit mode is taken into account?
> It is not, since on 32-bit mode the high-order 16 bits of a register destination are undefined. 
> If I recall correctly, in this case the high-order 16-bits on native
system actually reflect the high-order 16-bits of CR0.

This sounds like something that really should be verified
experimentally.  The above claim seems... odd.

	-hpa