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

[Till Schäfer]

sorry for the not very usefull information i provides above.

i will try to reproduce the the failure with a vailla kernel (host) in
a few days. currently the server is in use and cannot be restarted.

the kernel panic was in the guest (thought this is clear by "my vm
panic"). If it is reproducable with a vannilla kernel (host) i will
provide more detailed information here. the vm is using a 3.3.8 gentoo
kernel (not hardened).

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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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