VIR_MIGRATE_PARAM_PERSIST_XML was introduced into libvirt by b028e9d7c2f0f7713ba102d01aece13ee72136a1 and first included in the v1.3.4 release that came out in May of 2016.
In terms of which versions of Nova are impacted we've never provided VIR_MIGRATE_PARAM_PERSIST_XML so *any* version running alongside libvirt >= v1.3.4 would be as we don't cap the max supported version of libvirt for each release.
VIR_MIGRATE_ PARAM_PERSIST_ XML was introduced into libvirt by b028e9d7c2f0f77 13ba102d01aece1 3ee72136a1 and first included in the v1.3.4 release that came out in May of 2016.
In terms of which versions of Nova are impacted we've never provided VIR_MIGRATE_ PARAM_PERSIST_ XML so *any* version running alongside libvirt >= v1.3.4 would be as we don't cap the max supported version of libvirt for each release.