From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1NFBKa-0003k6-5Z
	for qemu-devel@nongnu.org; Mon, 30 Nov 2009 13:50:40 -0500
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1NFBKT-0003ar-Vj
	for qemu-devel@nongnu.org; Mon, 30 Nov 2009 13:50:38 -0500
Received: from [199.232.76.173] (port=60631 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1NFBKT-0003ah-Po
	for qemu-devel@nongnu.org; Mon, 30 Nov 2009 13:50:33 -0500
Received: from verein.lst.de ([213.95.11.210]:56236)
	by monty-python.gnu.org with esmtps
	(TLS-1.0:DHE_RSA_3DES_EDE_CBC_SHA1:24) (Exim 4.60)
	(envelope-from <hch@lst.de>) id 1NFBKT-0005PV-CN
	for qemu-devel@nongnu.org; Mon, 30 Nov 2009 13:50:33 -0500
Date: Mon, 30 Nov 2009 19:50:28 +0100
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [Qemu-devel] [PATCH 0/6] Fix -kernel with SeaBIOS v2
Message-ID: <20091130185028.GA1495@lst.de>
References: <20091120113113.GA26408@lst.de>
	<450764C8-F59A-411B-9733-07136D97981B@suse.de>
	<20091123202138.GA9879@lst.de>
	<5024501E-4BFD-4C6B-8455-20C406948C20@suse.de>
	<20091123213600.GA12479@lst.de> <4B0CFFD5.1010003@suse.de>
	<20091126114213.GA31527@lst.de> <4B0E6DD9.5030608@suse.de>
	<20091126121855.GA336@lst.de> <4B0E7376.3020907@suse.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4B0E7376.3020907@suse.de>
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: Alexander Graf <agraf@suse.de>
Cc: Juan Quintela <quintela@redhat.com>, Glauber Costa <glommer@redhat.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Avi Kivity <avi@redhat.com>, Christoph Hellwig <hch@lst.de>

On Thu, Nov 26, 2009 at 01:24:22PM +0100, Alexander Graf wrote:
> Hm - maybe worth a try to give it a -L to the source pc-bios directory
> anyways.

Doesn't change a thing.

> Sounds like your guest kernel is trying to access an x86_64 register?
> 
> You can of cause try insmod'ing kvm.ko with ignore_msrs=1. You hopefully
> don't need syscalls until you get into user space.

The option doesn't exist yet in 2.6.31 which I'm running on this box
because 2.6.32-rc has massive regressions for my workload.  I booted
into it again anyway to test the option - and interestingly enough
qemu with -enable-kvm boots just fine even without ignore_msrs=1.

Looks like the problem only happens with older kernels.