This series implements livepatch on PPC32 and implements
CONFIG_DYNAMIC_FTRACE_WITH_ARGS to simplify ftracing.

v2:
- Fix problem with strict modules RWX
- Convert powerpc to CONFIG_DYNAMIC_FTRACE_WITH_ARGS
- Convert function graph tracing to C
- Refactor PPC32 versus PPC64

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

Christophe Leroy (13):
  livepatch: Fix build failure on 32 bits processors
  tracing: Fix selftest config check for function graph start up test
  powerpc/module_32: Fix livepatching for RO modules
  powerpc/ftrace: Add support for livepatch to PPC32
  powerpc/ftrace: Don't save again LR in ftrace_regs_caller() on PPC32
  powerpc/ftrace: Simplify PPC32's return_to_handler()
  powerpc/ftrace: Prepare PPC32's ftrace_caller() for
    CONFIG_DYNAMIC_FTRACE_WITH_ARGS
  powerpc/ftrace: Prepare PPC64's ftrace_caller() for
    CONFIG_DYNAMIC_FTRACE_WITH_ARGS
  powerpc/ftrace: Implement CONFIG_DYNAMIC_FTRACE_WITH_ARGS
  powerpc/ftrace: Refactor ftrace_{en/dis}able_ftrace_graph_caller
  powerpc/ftrace: directly call of function graph tracer by ftrace
    caller
  powerpc/ftrace: Prepare ftrace_64_mprofile.S for reuse by PPC32
  powerpc/ftrace: Remove ftrace_32.S

 arch/powerpc/Kconfig                          |   7 +-
 arch/powerpc/include/asm/ftrace.h             |  62 +++---
 arch/powerpc/include/asm/livepatch.h          |  12 +-
 arch/powerpc/include/asm/thread_info.h        |   2 +-
 arch/powerpc/kernel/asm-offsets.c             |   2 +-
 arch/powerpc/kernel/module_32.c               |  44 +++--
 arch/powerpc/kernel/trace/Makefile            |   7 +-
 arch/powerpc/kernel/trace/ftrace.c            |  32 +--
 arch/powerpc/kernel/trace/ftrace_32.S         | 187 ------------------
 .../trace/{ftrace_64.S => ftrace_low.S}       |  14 ++
 ...ftrace_64_mprofile.S => ftrace_mprofile.S} | 158 +++++++--------
 kernel/livepatch/core.c                       |   4 +-
 kernel/trace/trace_selftest.c                 |   6 +-
 13 files changed, 178 insertions(+), 359 deletions(-)
 delete mode 100644 arch/powerpc/kernel/trace/ftrace_32.S
 rename arch/powerpc/kernel/trace/{ftrace_64.S => ftrace_low.S} (85%)
 rename arch/powerpc/kernel/trace/{ftrace_64_mprofile.S => ftrace_mprofile.S} (75%)

-- 
2.33.1

On Mon, 20 Dec 2021 16:37:58 +0000, Christophe Leroy wrote:
> This series implements livepatch on PPC32 and implements
> CONFIG_DYNAMIC_FTRACE_WITH_ARGS to simplify ftracing.
> 
> v2:
> - Fix problem with strict modules RWX
> - Convert powerpc to CONFIG_DYNAMIC_FTRACE_WITH_ARGS
> - Convert function graph tracing to C
> - Refactor PPC32 versus PPC64
> 
> [...]

Patches 1 and 3-13 applied to powerpc/next.

[01/13] livepatch: Fix build failure on 32 bits processors
        https://git.kernel.org/powerpc/c/2f293651eca3eacaeb56747dede31edace7329d2
[03/13] powerpc/module_32: Fix livepatching for RO modules
        https://git.kernel.org/powerpc/c/0c850965d6909d39fd69d6a3602bb62b48cad417
[04/13] powerpc/ftrace: Add support for livepatch to PPC32
        https://git.kernel.org/powerpc/c/a4520b25276500f1abcfc55d24f1251b7b08eff6
[05/13] powerpc/ftrace: Don't save again LR in ftrace_regs_caller() on PPC32
        https://git.kernel.org/powerpc/c/7875bc9b07cde868784195e215f4deaa0fa928a2
[06/13] powerpc/ftrace: Simplify PPC32's return_to_handler()
        https://git.kernel.org/powerpc/c/7bdb478c1d15cfd3a92db6331cb2d3dd3a8b9436
[07/13] powerpc/ftrace: Prepare PPC32's ftrace_caller() for CONFIG_DYNAMIC_FTRACE_WITH_ARGS
        https://git.kernel.org/powerpc/c/d95bf254be5f74c1e4c8f7cb64e2e21b9cc91717
[08/13] powerpc/ftrace: Prepare PPC64's ftrace_caller() for CONFIG_DYNAMIC_FTRACE_WITH_ARGS
        https://git.kernel.org/powerpc/c/c75388a8ceffbf1bf72c61afe66a72e58aa20c74
[09/13] powerpc/ftrace: Implement CONFIG_DYNAMIC_FTRACE_WITH_ARGS
        https://git.kernel.org/powerpc/c/40b035efe288f42bbf4483236cde652584ccb64e
[10/13] powerpc/ftrace: Refactor ftrace_{en/dis}able_ftrace_graph_caller
        https://git.kernel.org/powerpc/c/0c81ed5ed43863d313cf253b0ebada6ea2f17676
[11/13] powerpc/ftrace: directly call of function graph tracer by ftrace caller
        https://git.kernel.org/powerpc/c/830213786c498b0c488fedd2abc15a7ce442b42f
[12/13] powerpc/ftrace: Prepare ftrace_64_mprofile.S for reuse by PPC32
        https://git.kernel.org/powerpc/c/41315494beed087011f256b4f1439bb3d8236904
[13/13] powerpc/ftrace: Remove ftrace_32.S
        https://git.kernel.org/powerpc/c/4ee83a2cfbc46c13f2a08fe6d48dbcede53cdbf8

cheers