[VIRT-241 # QEMU ARMv8.x support ]

The new ARM ARM was released (DDI0487 D_a) including ARMv8.4. Add jira cards for all of the v8.4 features. Rearrange all of the stories into a hierarchy so that it's easier to track which cards belong to which architecture revision.

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

Working my way through this rather large extension: * Cleanup (most) direct uses of hcr_el2. * Add new hypervisor virtual timer. * Add contextidr_el2 and use it in breakpoint matching. * Add system register aliasing and redirection. * Added a new mmu_idx for the NS EL2&0 regime; working through all the places that should be handled.

[Upstream]

Posted kvm-vs-idregs patch set v3.

r~