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Subject[RFC PATCH 00/14] powerpc64: Add support for ftrace direct calls
Date
This series adds support for DYNAMIC_FTRACE_WITH_DIRECT_CALLS for 
powerpc64le.

This is mostly working fine for me, except for a soft lockup I see with
the ftrace direct selftest. It happens when irqsoff tracer is being
tested with the ftrace direct modules. This appears to be an existing
upstream issue since I am able to reproduce the lockup without these
patches. I will be looking into that to see if I can figure out the
cause of those lockups.

In the meantime, I would appreciate a review of these patches.


- Naveen


Naveen N. Rao (14):
ftrace: Fix updating FTRACE_FL_TRAMP
ftrace: Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency
ftrace: Fix cleanup in error path of register_ftrace_direct()
ftrace: Remove ftrace_find_direct_func()
ftrace: Add architectural helpers for [un]register_ftrace_direct()
powerpc: Add support for CONFIG_HAVE_FUNCTION_ARG_ACCESS_API
powerpc/ftrace: Remove dead code
powerpc/ftrace: Use FTRACE_REGS_ADDR to identify the correct ftrace
trampoline
powerpc/ftrace: Use a hash table for tracking ftrace stubs
powerpc/ftrace: Drop assumptions about ftrace trampoline target
powerpc/ftrace: Use GPR save/restore macros in ftrace_graph_caller()
powerpc/ftrace: Drop saving LR to stack save area for -mprofile-kernel
powerpc/ftrace: Add support for register_ftrace_direct() for
MPROFILE_KERNEL
samples/ftrace: Add powerpc support for ftrace direct samples

arch/powerpc/Kconfig | 2 +
arch/powerpc/include/asm/ftrace.h | 14 +
arch/powerpc/include/asm/ptrace.h | 31 ++
arch/powerpc/kernel/trace/ftrace.c | 314 +++++++++++++-----
.../powerpc/kernel/trace/ftrace_64_mprofile.S | 70 ++--
include/linux/ftrace.h | 7 +-
kernel/trace/Kconfig | 2 +-
kernel/trace/ftrace.c | 130 +++-----
samples/Kconfig | 2 +-
samples/ftrace/ftrace-direct-modify.c | 58 ++++
samples/ftrace/ftrace-direct-too.c | 48 ++-
samples/ftrace/ftrace-direct.c | 45 ++-
12 files changed, 519 insertions(+), 204 deletions(-)


base-commit: 4c202167192a77481310a3cacae9f12618b92216
--
2.25.4

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