linux-kernel - [PATCH v3 0/6] Add dynamic ftrace support for RISC-V platforms

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Date:   Thu, 18 Jan 2018 23:45:39 +0800
From:   Alan Kao <nonerkao@...il.com>
To:     Palmer Dabbelt <palmer@...ive.com>, Albert Ou <albert@...ive.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Kamil Rytarowski <n54@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        patches@...ups.riscv.org, linux-kernel@...r.kernel.org,
        Stefan O'Rear <sorear2@...il.com>
Cc:     Alan Kao <alankao@...estech.com>,
        Greentime Hu <greentime@...estech.com>
Subject: [PATCH v3 0/6] Add dynamic ftrace support for RISC-V platforms

This patch set includes the building blocks of dynamic ftrace features
for RISC-V machines.

Changes in v3:
 - Replace the nops at the tracer call sites into a "call ftrace_stub"
   instruction for better understanding (1/6 and 2/6)

Changes in v2:
 - Fix the return value as writing to kernel text goes wrong (2/6)
 - Replace manual comparisons by calling memcmp (2/6)
 - Simplify the conditional assignment in the Makefile (1/6)

Alan Kao (6):
  riscv/ftrace: Add RECORD_MCOUNT support
  riscv/ftrace: Add dynamic function tracer support
  riscv/ftrace: Add dynamic function graph tracer support
  riscv/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support
  riscv/ftrace: Add DYNAMIC_FTRACE_WITH_REGS support
  riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support

 arch/riscv/Kconfig              |   3 +
 arch/riscv/Makefile             |   3 +
 arch/riscv/include/asm/ftrace.h |  47 ++++++++
 arch/riscv/kernel/Makefile      |   5 +-
 arch/riscv/kernel/ftrace.c      | 142 ++++++++++++++++++++++-
 arch/riscv/kernel/mcount-dyn.S  | 241 ++++++++++++++++++++++++++++++++++++++++
 arch/riscv/kernel/mcount.S      |  22 ++--
 arch/riscv/kernel/stacktrace.c  |   6 +
 scripts/recordmcount.pl         |   5 +
 9 files changed, 461 insertions(+), 13 deletions(-)
 create mode 100644 arch/riscv/kernel/mcount-dyn.S

-- 
2.15.1