Fix LP: #1418221
This is just a hack, but seems functional.
Index: libvirt-1.2.12/src/qemu/qemu_capabilities.c
===================================================================
--- libvirt-1.2.12.orig/src/qemu/qemu_capabilities.c
+++ libvirt-1.2.12/src/qemu/qemu_capabilities.c
@@ -1886,6 +1886,9 @@ int virQEMUCapsGetDefaultVersion(virCaps
         return 0;
 
     hostarch = virArchFromHost();
+    if (hostarch == VIR_ARCH_PPC64LE)
+        hostarch = VIR_ARCH_PPC64;
+
     if ((binary = virCapabilitiesDefaultGuestEmulator(caps,
                                                       "hvm",
                                                       hostarch,