On Mon, 19 Apr 2021 10:47:24 +0000 (UTC), Christophe Leroy wrote:

This series converts powerpc to generic PTDUMP.

For that, we first need to add missing hugepd support
to pagewalk and ptdump.

v2:
- Reworked the pagewalk modification to add locking and check ops->pte_entry
- Modified powerpc early IO mapping to have gaps between mappings
- Removed the logic that checked for contiguous physical memory
- Removed the articial level calculation in ptdump_pte_entry(), level 4 is ok for all.
- Removed page_size argument to note_page()

[...]

Patches 2 and 4 pplied to powerpc/next.

[2/4] powerpc/mm: Leave a gap between early allocated IO areas
      https://git.kernel.org/powerpc/c/57307f1b6edd781fba2bf9f7ec5f4d17a881ea54
[3/4] powerpc/mm: Properly coalesce pages in ptdump
      https://git.kernel.org/powerpc/c/6ca6512c716afd6e37281372c4c35aa6afd71d10

cheers