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: Mon, 10 Sep 2012 13:47:41 +0200 Message-ID: <504DD35D.7010806@dlhnet.de> References: <5034F587.4000403@dlhnet.de> <5048BA0F.3070300@redhat.com> <504DC9BC.1060407@dlhnet.de> <504DCF1A.1@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Avi Kivity , "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" To: Paolo Bonzini Return-path: Received: from ssl.dlhnet.de ([91.198.192.8]:39669 "EHLO ssl.dlh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756872Ab2IJLrm (ORCPT ); Mon, 10 Sep 2012 07:47:42 -0400 In-Reply-To: <504DCF1A.1@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 09/10/12 13:29, Paolo Bonzini wrote: > Il 10/09/2012 13:06, Peter Lieven ha scritto: >> qemu-kvm-1.0.1-5107 [007] 410771.148000: kvm_entry: vcpu 0 >> qemu-kvm-1.0.1-5107 [007] 410771.148000: kvm_exit: reason MSR_READ rip >> 0x11478 info 0 0 >> qemu-kvm-1.0.1-5107 [007] 410771.148000: kvm_msr: msr_read 194 = 0x0 (#GP) >> qemu-kvm-1.0.1-5107 [007] 410771.148000: kvm_inj_exception: #GP (0x0) >> qemu-kvm-1.0.1-5107 [007] 410771.148000: kvm_entry: vcpu 0 >> qemu-kvm-1.0.1-5107 [007] 410771.148000: kvm_exit: reason TRIPLE_FAULT >> rip 0x11478 info 0 0 > Memory controller MSR: > > static float getNHMmultiplier(void) > { > unsigned int msr_lo, msr_hi; > float coef; > > /* Find multiplier (by MSR) */ > /* First, check if Flexible Ratio is Enabled */ > rdmsr(0x194, msr_lo, msr_hi); > if((msr_lo>> 16)& 1){ > coef = (msr_lo>> 8)& 0xFF; > } else { > rdmsr(0xCE, msr_lo, msr_hi); > coef = (msr_lo>> 8)& 0xFF; > } > > return coef; > } > > Looks like we need to emulate it since memtest only looks at the cpuid > to detect an integrated memory controller. What does this return for you? > > 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 I/O error. Peter