[Qemu-devel] [Bug 1037675] [NEW] Guest Kernel Panic if using "-cpu host" in qemu-kvm 1.1.1

[Till Schäfer]

Public bug reported:

After Upgrading to qemu-kvm-1.1.1-r1 from version 1.0.1-r1 my virtual
machines (running gentoo linux) panic at intel_pmu_init. (detailed
information including stacktrace are in the uploaded screenshot). When i
remove the "-cpu host" option, the system starts normally.

the command line from whicht the system is bootet:

qemu-kvm -vnc :7 -usbdevice tablet -daemonize -m 256 -drive
file=/data/virtual_machines/wgs-l08.img,if=virtio  -boot c -k de -net
nic,model=virtio,macaddr=12:12:00:12:34:63,vlan=0 -net
tap,ifname=qtap6,script=no,downscript=no,vlan=0 -smp 2 -enable-kvm -cpu
host -monitor unix:/var/run/qemu-kvm/wgs-l08.monitor,server,nowait

also reported on gentoo bug tracker (with some more details of the
host): https://bugs.gentoo.org/show_bug.cgi?id=431640

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1037675

Title:
  Guest Kernel Panic if using "-cpu host" in qemu-kvm 1.1.1

Status in QEMU:
  New

Bug description:
  After Upgrading to qemu-kvm-1.1.1-r1 from version 1.0.1-r1 my virtual
  machines (running gentoo linux) panic at intel_pmu_init. (detailed
  information including stacktrace are in the uploaded screenshot). When
  i remove the "-cpu host" option, the system starts normally.

  the command line from whicht the system is bootet:

  qemu-kvm -vnc :7 -usbdevice tablet -daemonize -m 256 -drive
  file=/data/virtual_machines/wgs-l08.img,if=virtio  -boot c -k de -net
  nic,model=virtio,macaddr=12:12:00:12:34:63,vlan=0 -net
  tap,ifname=qtap6,script=no,downscript=no,vlan=0 -smp 2 -enable-kvm
  -cpu host -monitor unix:/var/run/qemu-
  kvm/wgs-l08.monitor,server,nowait

  also reported on gentoo bug tracker (with some more details of the
  host): https://bugs.gentoo.org/show_bug.cgi?id=431640

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