[VIRT-327 # Richard's upstream QEMU work ]

* tcg patch queue flush, including some VHE prereqs. * target/hppa patch queue flushing. * combined the two in-flight avr patch sets, hoping to move that project to completion. * patch review. * target/s390x local variable "leak" fix, to satisfy a static analyzer.

[VIRT-263 # ARMv8.1-VHE Virtual Host Extensions ]

* started rebasing, and addressing the collected comments from v4 in December.

r~