From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Lieven Subject: Re: memtest 4.20+ does not work with -cpu host Date: Thu, 13 Sep 2012 09:53:09 +0200 Message-ID: <505190E5.9080008@dlhnet.de> References: <5034F587.4000403@dlhnet.de> <5048BA0F.3070300@redhat.com> <504DC9BC.1060407@dlhnet.de> <504DCF1A.1@redhat.com> <504DD483.6050104@dlhnet.de> <504DD9F5.2040300@redhat.com> <20120910122120.GA20907@redhat.com> <504DDD37.5000804@dlhnet.de> <504DDDDA.9040001@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Gleb Natapov , Paolo Bonzini , "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" To: Avi Kivity Return-path: Received: from ssl.dlhnet.de ([91.198.192.8]:56622 "EHLO ssl.dlh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751489Ab2IMHxM (ORCPT ); Thu, 13 Sep 2012 03:53:12 -0400 In-Reply-To: <504DDDDA.9040001@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 10.09.2012 14:32, Avi Kivity wrote: > On 09/10/2012 03:29 PM, Peter Lieven wrote: >> On 09/10/12 14:21, Gleb Natapov wrote: >>> On Mon, Sep 10, 2012 at 02:15:49PM +0200, Paolo Bonzini wrote: >>>> Il 10/09/2012 13:52, Peter Lieven ha scritto: >>>>>> dd if=/dev/cpu/0/msr skip=$((0x194)) bs=8 count=1 | xxd >>>>>> dd if=/dev/cpu/0/msr skip=$((0xCE)) bs=8 count=1 | xxd >>>>> it only works without the skip. but the msr device returns all zeroes. >>>> Hmm, the strange API of the MSR device doesn't work well with dd (dd >>>> skips to 0x194 * 8 because bs is 8. You can try this program: >>>> >>> There is rdmsr/wrmsr in msr-tools. >> rdmsr returns it cannot read those MSRs. regardless if I use -cpu host >> or -cpu qemu64. > On the host. > > did you get my output? #rdmsr -0 0x194 0000000000011100 #rdmsr -0 0xce 00000c0004011103 cheers, peter