From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [RFT] Fix for unhandled msr c0000081 problems under Intel cpus Date: Thu, 28 Dec 2006 15:02:23 +0100 Message-ID: <20061228140223.GA9418@elte.hu> References: <457FCBB9.5070800@qumranet.com> <45805400.3060308@mr511.de> <458117E4.4010807@qumranet.com> <45812407.7010803@qumranet.com> <20061228131445.GA1438@elte.hu> <4593C4CE.4040203@qumranet.com> <20061228132602.GA3392@elte.hu> <20061228134845.GA7446@elte.hu> <4593CD12.7010603@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: To: Avi Kivity Content-Disposition: inline In-Reply-To: <4593CD12.7010603-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org * Avi Kivity wrote: > >that did the trick. The only messages remaining are: > > > > kvm: unhandled wrmsr: 0xc1 > > inject_general_protection: rip 0xc011b8ae > > > > > > That's a performance counter. What guest triggers it? a 32-bit Linux bzImage: c011b8ae: 0f 30 wrmsr (gdb) list *0xc011b8ae 0xc011b8ae is in setup_apic_nmi_watchdog (include/asm/msr.h:36). 31 static inline void wrmsrl (unsigned long msr, unsigned long long val) 32 { 33 unsigned long lo, hi; 34 lo = (unsigned long) val; 35 hi = val >> 32; 36 wrmsr (msr, lo, hi); 37 } 38 39 /* wrmsr with exception handling */ 40 #define wrmsr_safe(msr,a,b) ({ int ret__; the guest also obviously crashes due to this #GPF. [ 2.6.20-rc2-rt2 kernel of course ;-) ] Ingo ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV