[VIRT-339 # ARMv8.5-BTI, Branch Target Identification ]

Posted v6. Some review from Dave Martin; will need at least one further revision, and to wait til the kernel patches land.

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

Fix a reported bug in pauth Auth results. Fix a reported bug in vector variable shift.

Review Peter's vfp decodetree patch set. Review of v18 of target/rx. Never-ending, it seems... Review of some target/ppc vector patches.

Posted v4 of CPUNegativeOffsetState. This looks ready to pull.

r~