From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Roedel, Joerg" Subject: Re: DOS VM problem with QEMU-KVM and newer kernels Date: Mon, 16 Apr 2012 12:30:27 +0200 Message-ID: <20120416103026.GV2428@amd.com> References: <4F871FB6.4020906@wiesinger.com> <4F8A988A.2000009@redhat.com> <4F8BF3A1.8090200@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: Avi Kivity , Gerhard Wiesinger , "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" , Kevin Wolf To: Jan Kiszka Return-path: Received: from va3ehsobe004.messaging.microsoft.com ([216.32.180.14]:20007 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752198Ab2DPKai (ORCPT ); Mon, 16 Apr 2012 06:30:38 -0400 Content-Disposition: inline In-Reply-To: <4F8BF3A1.8090200@siemens.com> Sender: kvm-owner@vger.kernel.org List-ID: On Mon, Apr 16, 2012 at 12:25:37PM +0200, Jan Kiszka wrote: > On 2012-04-15 11:44, Avi Kivity wrote: > > Jan, Joerg, was an AMD erratum published for the bug? > > It wasn't an erratum but a documented feature limitation in the AMD > architecture that was simply ignored by the old code. Right. But there is an erratum on K8 (only) which Kevin ran into. It is documented as Erratum 701 and the bug is that no EXITINTINFO is stored on a task-switch intercept on K8. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632