[PATCH v4 0/8] Update hash MMU kernel mapping to be in sync with radix

[Aneesh Kumar K.V]

This patch series map all the kernel regions (vmalloc, IO and vmemmap) using
0xc top nibble address. This brings hash translation kernel mapping in sync with radix.
Each of these regions can now map 512TB. We use one context to map these
regions and hence the 512TB limit. We also update radix to use the same limit even though
we don't have context related restrictions there.

With this we have for 4K

 kernel vmalloc start   = 0xc008000000000000
 kernel IO start        = 0xc008100000000000
 kernel vmemmap start   = 0xc008200000000000

64K hash, 64K radix and 4k radix:

  kernel vmalloc start   = 0xc008000000000000
  kernel IO start        = 0xc00a000000000000
  kernel vmemmap start   = 0xc00c000000000000


Changes from v3:
* Make 4k page size hash translation vmalloc start address to be
  same as hash 64k and radix.

Aneesh Kumar K.V (8):
  powerpc/mm/hash64: Add a variable to track the end of IO mapping
  powerpc/mm/hash64: Map all the kernel regions in the same 0xc range
  powerpc/mm: Validate address values against different region limits
  powerpc/mm: Drop the unnecessary region check
  powerpc/mm/hash: Simplify the region id calculation.
  powerpc/mm: Print kernel map details to dmesg
  powerpc/mm/hash: Rename KERNEL_REGION_ID to LINEAR_MAP_REGION_ID
  powerpc/mm/hash/4K: Update the vmalloc start for hash 4K config

 arch/powerpc/include/asm/book3s/64/hash-4k.h  | 21 ++++
 arch/powerpc/include/asm/book3s/64/hash-64k.h | 12 +++
 arch/powerpc/include/asm/book3s/64/hash.h     | 95 ++++++++++++-------
 arch/powerpc/include/asm/book3s/64/mmu-hash.h | 42 ++++----
 arch/powerpc/include/asm/book3s/64/mmu.h      |  9 +-
 arch/powerpc/include/asm/book3s/64/pgtable.h  |  9 +-
 arch/powerpc/include/asm/book3s/64/radix.h    | 40 ++++----
 arch/powerpc/include/asm/page.h               | 11 ---
 arch/powerpc/kernel/setup-common.c            |  3 +
 arch/powerpc/kvm/book3s_hv_rm_xics.c          |  2 +-
 arch/powerpc/mm/copro_fault.c                 | 18 ++--
 arch/powerpc/mm/hash_utils_64.c               | 45 ++++++---
 arch/powerpc/mm/pgtable-hash64.c              | 13 ++-
 arch/powerpc/mm/pgtable-radix.c               | 24 ++++-
 arch/powerpc/mm/pgtable_64.c                  |  9 +-
 arch/powerpc/mm/ptdump/hashpagetable.c        |  2 +-
 arch/powerpc/mm/ptdump/ptdump.c               |  3 +-
 arch/powerpc/mm/slb.c                         | 26 +++--
 arch/powerpc/platforms/cell/spu_base.c        |  4 +-
 drivers/misc/cxl/fault.c                      |  2 +-
 drivers/misc/ocxl/link.c                      |  2 +-
 21 files changed, 254 insertions(+), 138 deletions(-)

-- 
2.20.1