[Qemu-devel] [Bug 1285708] [NEW] FreeBSD Guest crash on boot due to xsave instruction issue

[Qemu-devel] [Bug 1285708] [NEW] FreeBSD Guest crash on boot due to xsave instruction issue

[Jesse Pretorius]

Public bug reported:

When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
with the following command:

kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
-net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
core2duo,+xsave

The FreeBSD Guest will kernel crash on boot with the following error:

panic: CPU0 does not support X87 or SSE: 0

When launching the guest without the cpu flags, it works just fine.

This bug has been resolved in source: https://lkml.org/lkml/2014/2/22/58

Can this fix be included in Precise ASAP!

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Jesse Pretorius]

** Also affects: qemu-kvm
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New
Status in qemu-kvm:
  New
Status in “qemu” package in Ubuntu:
  New

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Serge Hallyn]

Thanks for reporting this bug.  Given the lkml.org fix, I assume this is
in fact a kernel bug, so assigning it as such.

This is presumably fix-released in utopic, but SRU-able to precise and
trusty's backport kernels.  I'm not clearn on how that process works, so
leaving it like this.

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: qemu (Ubuntu)

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  New

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Missing required logs.

[Brad Figg]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1285708

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Chris J Arges]

$ git tag --contains 56c103ec040b1944c8866f79aa768265c0dd2986
v3.15-rc1

The patch in question is already in 3.16 / Utopic.

I can reproduce this easily in Trusty.

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
       Status: Incomplete => Fix Released

** Changed in: linux (Ubuntu Trusty)
       Status: New => In Progress

** Changed in: linux (Ubuntu Trusty)
     Assignee: (unassigned) => Chris J Arges (arges)

** Changed in: linux (Ubuntu Trusty)
   Importance: Undecided => Medium

** Also affects: linux (Ubuntu Precise)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Precise)
     Assignee: (unassigned) => Chris J Arges (arges)

** Changed in: linux (Ubuntu Precise)
   Importance: Undecided => Medium

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  New
Status in “linux” source package in Trusty:
  In Progress

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Chris J Arges]

As a workaround use the 'host' cpu type so the proper bits are enabled:
 -cpu host,+xsave

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  New
Status in “linux” source package in Trusty:
  In Progress

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Chris J Arges]

** Changed in: linux (Ubuntu Precise)
       Status: New => Won't Fix

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  New
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Won't Fix
Status in “linux” source package in Trusty:
  In Progress

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Paolo Bonzini]

You don't need "+xsave", "-cpu host" just works.

The bug is invalid. You are requesting a CPU that doesn't exist (a
core2duo that supports XSAVE), and the guest's behavior is probably not
going to be well defined.


** Changed in: qemu
       Status: New => Invalid

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  Invalid
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Won't Fix
Status in “linux” source package in Trusty:
  In Progress

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Jesse Pretorius]

Quite right - our workaround was to switch to using the host
capabilities instead of the compatibility fallback. However, the
decision for a compatibility fallback was automatically made and
included the above combination. I don't know where that bug should sit.

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  Invalid
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Won't Fix
Status in “linux” source package in Trusty:
  In Progress

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Chris J Arges]

Testing with the identified patch doesn't solve the issue, in addition
looking at the cpu flags (core2duo +xsave) this may not be a valid
configuration since xsave assumes additional features will be there
(instead of creating an older cpu model with xsave.) Therefore I believe
this is a configuration issue.

The comment above in #4 assumes your host has the correct cpu features, you can always run something like:
kvm -cpu host,+xsave,check   to check if are issues with the host plus additional features settings. In addition I've been able to use '-cpu SandyBridge,+xsave' and this also works.

Marking this 'Won't Fix' as there is a clear workaround (use another CPU
model), and this configuration may not be valid.

Thanks

** Changed in: linux (Ubuntu Trusty)
       Status: In Progress => Won't Fix

** Changed in: linux (Ubuntu)
       Status: Fix Released => Invalid

** Changed in: linux (Ubuntu Precise)
   Importance: Medium => Undecided

** Changed in: linux (Ubuntu Trusty)
   Importance: Medium => Undecided

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  Invalid
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Invalid
Status in “linux” source package in Precise:
  Won't Fix
Status in “linux” source package in Trusty:
  Won't Fix

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions

[Qemu-devel] [Bug 1285708] Re: FreeBSD Guest crash on boot due to xsave instruction issue

[Chris J Arges]

I should have refreshed my browser before commenting. : ) Thanks Jesse
and Paolo.

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Title:
  FreeBSD Guest crash on boot due to xsave instruction issue

Status in QEMU:
  Invalid
Status in qemu-kvm:
  New
Status in “linux” package in Ubuntu:
  Invalid
Status in “linux” source package in Precise:
  Won't Fix
Status in “linux” source package in Trusty:
  Won't Fix

Bug description:
  When trying to boot a working FreeBSD 9.1/9.2 guest on a kvm/qemu host
  with the following command:

  kvm -m 256 -cdrom FreeBSD-9.2-RELEASE-amd64-disc1.iso -drive
  file=FreeBSD-9.2-RELEASE-amd64.qcow2,if=virtio -net nic,model=virtio
  -net user -nographic -vnc :10 -enable-kvm -balloon virtio -cpu
  core2duo,+xsave

  The FreeBSD Guest will kernel crash on boot with the following error:

  panic: CPU0 does not support X87 or SSE: 0

  When launching the guest without the cpu flags, it works just fine.

  This bug has been resolved in source:
  https://lkml.org/lkml/2014/2/22/58

  Can this fix be included in Precise ASAP!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1285708/+subscriptions