I have the same issue.
Apparently there are patches for this error, which only affects intel:
http://www.gossamer-threads.com/lists/xen/devel/185593
For logging the output is the same as in the above thread:
Xen call trace
=========xsave_init + 0x6d/0x1f0
init_intel + 0x13d/0x380
generic_identity + 0x39/0x190
identify_cpu + 0xe2/0x250
__start_xen + 0x2ec6/0x3340
__high_start + 0xa1/0xa3
Error message:
==========Panic on CPU 0:
Xen BUG at i387.c:159
For more info:
http://wiki.xensource.com/xenwiki/Xen4.0
In Xen 4.0.1 there's a bug in HVM guest save/restore/livemigration on
Intel CPUs, related to XSAVE feature. As a workaround you can add
"no-xsave" as an option to Xen command line in grub.conf. This issue
is fixed in Xen 4.0.2-rc1-pre with this patch:
http://xenbits.xen.org/xen-4.0-testing.hg?rev/16867267ac12 .
--
Marcus Furlong
