From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: use of PMU in guest generates messages in host Date: Thu, 12 Jan 2012 08:26:46 +0200 Message-ID: <20120112062646.GQ2167@redhat.com> References: <4F0DF57B.5040500@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: KVM mailing list To: David Ahern Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63952 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751102Ab2ALG0s (ORCPT ); Thu, 12 Jan 2012 01:26:48 -0500 Content-Disposition: inline In-Reply-To: <4F0DF57B.5040500@gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, Jan 11, 2012 at 01:47:55PM -0700, David Ahern wrote: > Using latest kernel tree (e343a895a9f342f239c5e3c5ffc6c0b1707e6244) > which has KVM bits for using PMU in the guest. Host and guest are both > running Fedora 16, 64-bit, with this kernel. > > Running this command in the guest: > perf stat -ddd -- openssl speed aes > > Generates this in the host: > [74728.221863] kvm_set_msr_common: 2760 callbacks suppressed > [74728.221950] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.222115] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.222858] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.223018] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.223851] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.224009] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.224843] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.224997] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701 > [74728.225842] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f001 > [74728.226010] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f001 > This is MSR_OFFCORE_RSP_0 MSR which is not (yet?) supported. What is your host cpu and qemu command line? -- Gleb.