[PATCH v11 0/9] powerpc: Further Strict RWX support

[Jordan Niethe]

Adding more Strict RWX support on powerpc, in particular Strict Module RWX.
Thanks for all of the feedback everyone.
It is now rebased on linux-next.

For reference the previous revision is available here: 
https://lore.kernel.org/linuxppc-dev/20210330045132.722243-1-jniethe5@gmail.com/

The changes in v11 for each patch:

Christophe Leroy (2):
  powerpc/mm: implement set_memory_attr()
  powerpc/32: use set_memory_attr()

Jordan Niethe (4):
  powerpc/lib/code-patching: Set up Strict RWX patching earlier
  powerpc: Always define MODULES_{VADDR,END}
    v11: - Consider more places MODULES_VADDR was being used
  powerpc/bpf: Remove bpf_jit_free()
    v11: - New to series
  powerpc/bpf: Write protect JIT code
    v11: - Remove CONFIG_STRICT_MODULE_RWX conditional

Russell Currey (3):
  powerpc/mm: Implement set_memory() routines
    v11: - Update copywrite dates
         - Allow set memory functions to be used without Strict RW
         - Hash: Disallow certain regions and add comment explaining why
         - Have change_page_attr() take function pointers to manipulate ptes
         - Clarify change_page_attr()'s comment
         - Radix: Add ptesync after set_pte_at()
  powerpc/kprobes: Mark newly allocated probes as ROX
    v11: Neaten up
  powerpc: Set ARCH_HAS_STRICT_MODULE_RWX
    v11: Neaten up

Some patches were dropped from this revision:
  powerpc/mm/ptdump: debugfs handler for W+X checks at runtime
    - Will use Christophe's generic ptdump series
  powerpc/configs: Enable STRICT_MODULE_RWX in skiroot_defconfig
    - Will enable STRICT_MODULE_RWX by default later


 arch/powerpc/Kconfig                  |   2 +
 arch/powerpc/include/asm/pgtable.h    |  11 ++
 arch/powerpc/include/asm/set_memory.h |  12 +++
 arch/powerpc/kernel/kprobes.c         |  11 ++
 arch/powerpc/kernel/module.c          |  14 +--
 arch/powerpc/lib/code-patching.c      |  12 +--
 arch/powerpc/mm/Makefile              |   2 +-
 arch/powerpc/mm/kasan/kasan_init_32.c |  10 +-
 arch/powerpc/mm/pageattr.c            | 138 ++++++++++++++++++++++++++
 arch/powerpc/mm/pgtable_32.c          |  60 ++---------
 arch/powerpc/mm/ptdump/ptdump.c       |   4 +-
 arch/powerpc/net/bpf_jit_comp.c       |  13 +--
 12 files changed, 204 insertions(+), 85 deletions(-)
 create mode 100644 arch/powerpc/include/asm/set_memory.h
 create mode 100644 arch/powerpc/mm/pageattr.c

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2.25.1