With this patch, Freescale ppc64 CPU modesl could be recognized.

virsh # cpu-models ppc64
POWERPC_e6500
POWERPC_e5500
power8
power8e
power7+
power7
power6
POWER8_v1.0
POWER7+_v2.1
POWER7_v2.3
POWER7_v2.1
POWER7

virsh # capabilities
<capabilities>
  <host>
    <uuid>5a54efa6-20dc-4da7-b271-0b7fb7062cb8</uuid>
    <cpu>
      <arch>ppc64</arch>
      <model>POWERPC_e6500</model>
      <vendor>Freescale</vendor>