From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: "KVM internal error. Suberror: 1" with ancient 2.4 kernel as
 guest
Date: Tue, 31 Aug 2010 18:49:07 +0300
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Cc: Marcelo Tosatti <mtosatti@redhat.com>, kvm@vger.kernel.org
To: Jiri Kosina <jkosina@suse.cz>
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  On 08/31/2010 05:32 PM, Jiri Kosina wrote:
> (qemu) x/5i $eip
> 0x00000000c027a841:  movq   (%esi),%mm0
> 0x00000000c027a844:  movq   0x8(%esi),%mm1
> 0x00000000c027a848:  movq   0x10(%esi),%mm2
> 0x00000000c027a84c:  movq   0x18(%esi),%mm3
> 0x00000000c027a850:  movq   %mm0,(%edx)
> ===
>
> Is there any issue with emulating MMX?
>

Yes.  MMX is not currently emulated.

If there's a command line option to disable the use of MMX you can try 
it, otherwise wait for it to be implemented (or implement it yourself).  
I'll try to do it for 2.6.37, but can't promise anything.