Messages in this thread | | | From | "Naveen N. Rao" <> | Subject | [RFC PATCH 00/14] powerpc64: Add support for ftrace direct calls | Date | Thu, 26 Nov 2020 23:38:37 +0530 |
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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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