On Thu, Jun 3, 2010 at 10:23 AM, Dave Young <hidave.darkstar@xxxxxxxxx> wrote: > On Thu, Jun 3, 2010 at 9:34 AM, Dave Young <hidave.darkstar@xxxxxxxxx> wrote: >> On Wed, Jun 2, 2010 at 8:45 PM, Andre Przywara <andre.przywara@xxxxxxx> wrote: >>> Dave Young wrote: >>>> >>>> Hi, >>>> >>>> With today's git version (qemu-kvm), I got following message in kernel >>>> dmesg >>>> >>>> [168344.215605] kvm: 27289: cpu0 unhandled wrmsr: 0x198 data 0 >>> >>> Are you sure about that? >> >> Sure >> >> 0x198 is an Intel architectural perfmon MSR and it >>> is read-only. The Linux kernel source I grep'ed obeys this and does only >>> rdmsr. >>> You can work around this by changing the error to a warning with: >>> # modprobe kvm ignore_msrs=1 >> >> with this param, appear following warning: >> kvm: 28520: cpu0 ignored wrmsr: 0x198 data 0 >> >>> >>> I'd like to see more details about the guest Linux kernel, at least the >>> version you used to see why there is a wrmsr on this address. Best is you >>> provide the kernel (just the vmlinuz file) somewhere so that we can >>> reproduce this. Also the qemu-kvm command line would be interesting. >> >> Actually I tried different guest image, recreate this problem is easy. >> >> one of them is slackware 13.0 kernel version 2.6.29.6, you can download from: >> http://www.slackware.at/data/slackware64-13.0/kernels/huge.s/ >> >> kvm cmdline: >> qemu-system-x86_64 -net nic -net tap,ifname=tap0,script=no slack64.img >> >>> >>> Regards, >>> Andre. >>> >>>> >>>> bash-3.1$ /home/dave/tmp/qemu-system-x86_64 --version >>>> QEMU emulator version 0.12.50 (qemu-kvm-devel), Copyright (c) >>>> 2003-2008 Fabrice Bellard > > Another problem with this build is I can not boot from virtio-blk, cmdline: > qemu-system-x86_64 -boot c -drive file=slack64.img,if-virtio,boot=on typo, if=virtio > > qemu just complain about: > Could not read the boot disk > > Anything missing by me? > >>>> >>>> >>>> bash-3.1$ uname -a >>>> Linux darkstar 2.6.35-rc1 #35 SMP Mon May 31 16:50:15 CST 2010 x86_64 >>>> Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz GenuineIntel GNU/Linux >>>> >>>> host distribution is slackware64-13.0 >>>> >>>> 0.12.3 works well >>>> >>>> BTW the guest is a tiny core linux image >>>> >>> >>> -- >>> Andre Przywara >>> AMD-Operating System Research Center (OSRC), Dresden, Germany >>> Tel: +49 351 448-3567-12 >>> >>> -- >>> To unsubscribe from this list: send the line "unsubscribe kvm" in >>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> >> >> >> -- >> Regards >> dave >> > > > > -- > Regards > dave > -- Regards dave -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
