[PATCH v7 0/5] Use per-CPU temporary mappings for patching on Radix MMU

[Jordan Niethe <jniethe5@gmail.com>]

This is a revision of Chris' series to introduces a per cpu temporary mm to be
used for patching with strict rwx on radix mmus.

The previous version of the series is here:
https://lore.kernel.org/linuxppc-dev/20210911022904.30962-1-cmr@bluescreens.de/

v7: - introduce helper functions for clearing and restoring breakpoint
      registers when using the temporary mm
    - use a new patch_instruction_mm() function instead of needing repeated
      conditionals and a struct to save state to work within
      do_patch_instruction() 
    - include a ptesync after setting the pte

Christopher M. Riedl (4):
  powerpc/64s: Introduce temporary mm for Radix MMU
  powerpc: Rework and improve STRICT_KERNEL_RWX patching
  powerpc: Use WARN_ON and fix check in poking_init
  powerpc/64s: Initialize and use a temporary mm for patching on Radix

Jordan Niethe (1):
  powerpc: Allow clearing and restoring registers independent of saved
    breakpoint state

 arch/powerpc/include/asm/debug.h |   2 +
 arch/powerpc/kernel/process.c    |  36 ++++++-
 arch/powerpc/lib/code-patching.c | 162 +++++++++++++++++++++++++++----
 3 files changed, 176 insertions(+), 24 deletions(-)

-- 
2.25.1