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 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 -- 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
