As per our policy, the next officially supported Virt SIG Xen version will be 4.8. However, with 4.7 coming soon, I’ve ported the patchqueue over to 4.7rc4 and given it a spin. If you want to help testing for the upstream 4.7 release, do give it a spin and report any regressions.
Please note that this version WILL NOT SUPPORTED. 4.6 is still the officially-supported version until 4.8 comes out (probably in around 6