From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: Bug#707257: linux-image-3.8-1-686-pae: KVM crashes with "entry
 failed, hardware error 0x80000021"
Date: Sun, 23 Jun 2013 10:51:17 +0300
Message-ID: <20130623075117.GN5832@redhat.com>
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Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Ben Hutchings <ben@decadent.org.uk>, kvm@vger.kernel.org,
	707257@bugs.debian.org
To: Stefan Pietsch <stefan.pietsch@lsexperts.de>
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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.

--
			Gleb.