From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jes Sorensen Subject: Re: [PATCH] Write to read-only msr MSR_IA32_PERF_STATUS is harmless, ignore it! Date: Wed, 01 Sep 2010 10:42:00 +0200 Message-ID: <4C7E11D8.1060202@redhat.com> References: <1283257029-24102-1-git-send-email-Jes.Sorensen@redhat.com> <4C7D2DA6.40105@redhat.com> <4C7D2EDE.7020708@redhat.com> <20100831200200.GA14098@amt.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Avi Kivity , kvm@vger.kernel.org To: Marcelo Tosatti Return-path: Received: from mx1.redhat.com ([209.132.183.28]:34155 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751274Ab0IAImD (ORCPT ); Wed, 1 Sep 2010 04:42:03 -0400 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o818g3Nm028022 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 1 Sep 2010 04:42:03 -0400 In-Reply-To: <20100831200200.GA14098@amt.cnet> Sender: kvm-owner@vger.kernel.org List-ID: On 08/31/10 22:02, Marcelo Tosatti wrote: > On Tue, Aug 31, 2010 at 06:33:34PM +0200, Jes Sorensen wrote: >> which makes no sense to me, but given it's x86, I am not sure if it >> could have come from the BIOS or something during reboot? > > kvm_reset_msrs in qemu-kvm-x86.c. Interesting, I hadn't thought KVM would be able to cause itself to trap writes like this. Avi's patch looks good though :) Cheers, Jes