From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1M0LY9-0001Z1-Es
	for qemu-devel@nongnu.org; Sat, 02 May 2009 16:11:05 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1M0LY6-0001Yl-2k
	for qemu-devel@nongnu.org; Sat, 02 May 2009 16:11:05 -0400
Received: from [199.232.76.173] (port=45166 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1M0LY5-0001Yi-P9
	for qemu-devel@nongnu.org; Sat, 02 May 2009 16:11:01 -0400
Received: from e39.co.us.ibm.com ([32.97.110.160]:57155)
	by monty-python.gnu.org with esmtps
	(TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60)
	(envelope-from <aliguori@us.ibm.com>) id 1M0LY5-00075H-Dv
	for qemu-devel@nongnu.org; Sat, 02 May 2009 16:11:01 -0400
Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com
	[9.17.195.227])
	by e39.co.us.ibm.com (8.13.1/8.13.1) with ESMTP id n42K60JU025653
	for <qemu-devel@nongnu.org>; Sat, 2 May 2009 14:06:00 -0600
Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168])
	by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id
	n42K9SZC094726
	for <qemu-devel@nongnu.org>; Sat, 2 May 2009 14:09:28 -0600
Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1])
	by d03av02.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id
	n42K9RI2016663
	for <qemu-devel@nongnu.org>; Sat, 2 May 2009 14:09:28 -0600
Message-ID: <49FCA877.6010105@us.ibm.com>
Date: Sat, 02 May 2009 15:09:27 -0500
From: Anthony Liguori <aliguori@us.ibm.com>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] Re: [PATCH  0/8] kvm: Fixes,
	cleanups and  livemigration
References: <20090501211717.24514.23246.stgit@mchn012c.ww002.siemens.net>
	<49FB7A40.1020005@us.ibm.com> <20090502074041.GB7198@redhat.com>
	<49FC4F90.1030901@codemonkey.ws>
	<20090502172308.GA13933@redhat.com> <49FC9B39.4080408@redhat.com>
	<20090502200754.GB13933@redhat.com>
In-Reply-To: <20090502200754.GB13933@redhat.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Gleb Natapov <gleb@redhat.com>
Cc: Jan Kiszka <jan.kiszka@web.de>, Avi Kivity <avi@redhat.com>, qemu-devel@nongnu.org

Gleb Natapov wrote:
> On Sat, May 02, 2009 at 10:12:57PM +0300, Avi Kivity wrote:
>   
>> Gleb Natapov wrote:
>>     
>>>> I think the right thing to do with this is introduce a kvm-cpu savevm 
>>>>  that stores this information since it isn't relevant to TCG.  I 
>>>> think  it's arguable whether you want instruction length there (can 
>>>> you get it  reliably on SVM?).
>>>>
>>>>     
>>>>         
>>> We can't get it on SVM without instruction decoding, but it is not required
>>> on SVM. It is absolutely essential for soft interrupt/exception injection
>>> on VMX and has to be a part of migratable state.
>>>   
>>>       
>> We need it in some neutral form so cross-vendor migration can work.
>>
>>     
> VMX->SVM No problem.
> SVM->VMX bad luck :)  We will have to decode instruction ourself. 
>   

Any reason to not just always decode the instruction then?

Regards,

Anthony Liguori