This bug has been copied from bug #866999 and has been proposed
to be backported to 6.3 z-stream (EUS).
Sent for review: http://post-office.corp.redhat.com/archives/rhvirt-patches/2012-October/msg01258.html
Verified on libvirt-0.9.10-21.el6_3.6.x86_64 (rhel6.3).
The VM's xml given by "virsh capabilities" now contains the cpu topology:
<topology sockets='1' cores='1' threads='1'/>
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.