Bug#707257: linux-image-3.8-1-686-pae: KVM crashes with "entry failed, hardware error 0x80000021"

[Stefan Pietsch <stefan.pietsch@lsexperts.de>]

On 23.06.2013 09:51, Gleb Natapov wrote:
> On Thu, Jun 20, 2013 at 07:01:49PM +0200, Stefan Pietsch wrote:
>>> Can you provide the output of 25391454e73e3156202264eb3c473825afe4bc94
>>> and emulate_invalid_guest_state=0. Also run "x/20i $pc-20" in qemu
>>> monitor after the hang.
>>
>>
>> 25391454e73e3156202264eb3c473825afe4bc94
>>  emulate_invalid_guest_state=0
>>
> Very interesting. Looks like somewhere during TPR access FS
> register gets corrupted. Can you remove /usr/share/kvm/kvmvapic.bin
> and try again? This will disable some code paths during TPR access and
> will narrow down the issue.


Doing this, qemu complains
"Could not open option rom 'kvmvapic.bin': No such file or directory",
but the virtual machine boots successful with
emulate_invalid_guest_state=0 and emulate_invalid_guest_state=1.

kvmvapic.bin comes with Debian package "seabios 1.7.2-3".