[RFC PATCH v2 0/3] KASAN for nohash PPC32

[Christophe Leroy]

This serie adds KASAN support to nohash PPC32

Tested on 8xx

Changes in v2:
- Rebased.
- Using __set_pte_at() to build the early table.
- Worked around and got rid of the patch adding asm/page.h in asm/pgtable-types.h
    ==> might be fixed independently but needed for this serie.

In principle, this should also work on the 603. For now I have not been
able to boot, it stops before early console is active, so I'm quite blind at the
moment and don't really know what's wrong. Any idea ?

For hash32 (not 603), it cannot work as is because due to HASHPTE flag, we
can't use the same pagetable for several PGD entries.

Christophe Leroy (3):
  powerpc/mm: prepare kernel for KAsan on PPC32
  powerpc/32: Move early_init() in a separate file
  powerpc/nohash32: Add KASAN support

 arch/powerpc/Kconfig                         |  1 +
 arch/powerpc/include/asm/kasan.h             | 22 +++++++++
 arch/powerpc/include/asm/nohash/32/pgtable.h |  2 +
 arch/powerpc/include/asm/ppc_asm.h           |  5 ++
 arch/powerpc/include/asm/setup.h             |  5 ++
 arch/powerpc/include/asm/string.h            | 14 ++++++
 arch/powerpc/kernel/Makefile                 |  5 +-
 arch/powerpc/kernel/cputable.c               |  4 +-
 arch/powerpc/kernel/early_32.c               | 35 +++++++++++++
 arch/powerpc/kernel/setup-common.c           |  2 +
 arch/powerpc/kernel/setup_32.c               | 31 ++----------
 arch/powerpc/lib/Makefile                    |  2 +
 arch/powerpc/lib/copy_32.S                   |  9 ++--
 arch/powerpc/mm/Makefile                     |  3 ++
 arch/powerpc/mm/dump_linuxpagetables.c       |  8 +++
 arch/powerpc/mm/kasan_init.c                 | 73 ++++++++++++++++++++++++++++
 arch/powerpc/mm/mem.c                        |  4 ++
 17 files changed, 191 insertions(+), 34 deletions(-)
 create mode 100644 arch/powerpc/include/asm/kasan.h
 create mode 100644 arch/powerpc/kernel/early_32.c
 create mode 100644 arch/powerpc/mm/kasan_init.c

-- 
2.13.3