Hi,
This series implements pnv-phb4 user devices for the powernv9 machine.
It also includes a couple of pnv-phb3 and pnv-phb3-root-port fixes that
were also applied for the pnv4 equivalents.
During the enablement I had to rollback from the previously added
support for user creatable pnv-phb4-pec devices. The most important
reason is user experience. PEC devices that doesn't spawn the PHB
devices will be just a placeholder to add PHBs, having no use of their
own as far as the user sees it. From this standpoint it makes more sense
to just create all PECs and attach the PHBs the user wants on them.
Patch 14 also describes technical reasons to rollback this support.
The series is rebased using Cedric's 'powernv-6.2' branch [1]i, which
includes the '[PATCH 0/5] ppc/pnv: Preliminary cleanups before user
created PHBs' patches [2].
[1] https://github.com/legoater/qemu/tree/powernv-6.2
[2] https://lists.gnu.org/archive/html/qemu-devel/2021-12/msg03810.html