From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Live migration fails due to c/s 20627
Date: Tue, 15 Dec 2009 10:25:45 -0800
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To: "Xu, Dongxiao" <dongxiao.xu@intel.com>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, "kurt.hackel@oracle.com" <kurt.hackel@oracle.com>, "Dugger,
	Donald D" <donald.d.dugger@intel.com>, Keir Fraser <keir.fraser@eu.citrix.com>, "Nakajima,
	Jun" <jun.nakajima@intel.com>, "Zhang, Xiantao" <xiantao.zhang@intel.com>
List-Id: xen-devel@lists.xenproject.org

On 12/15/2009 09:24 AM, Xu, Dongxiao wrote:
> If CPU has rdtsc but no rdtscp, then the VM exec control bit in VMCS
> won't be turned on. Therefore if rdtscp instruction runs, it will encounter
> invalid op code directly but no VMEXIT.
>    

Ah, right.  You'd need to make that particular illegal instruction vmexit.

     J