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SubjectRe: [PATCH v4 0/6] Add dynamic ftrace support for RISC-V platforms
On Tue, Feb 13, 2018 at 01:13:15PM +0800, Alan Quey-Liang Kao(高魁良) wrote:
> This patch set includes the building blocks of dynamic ftrace features
> for RISC-V machines.
>
> Changes in v4:
> - Organize code structure according to changes in v3
> - Rebase onto the riscv-linux-4.15 branch at github's
> riscv/riscv-linux repo. Note that this set is based on the previous
> ftrace patch, which provided basic support.
>
> Changes in v3:
> - Replace the nops at the tracer call sites into "call ftrace_stub"
> instructions for better understanding (1/6, 2/6 and 5/6)
>
> 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 | 56 ++++++++++
> arch/riscv/kernel/Makefile | 5 +-
> arch/riscv/kernel/ftrace.c | 175 ++++++++++++++++++++++++++++-
> arch/riscv/kernel/mcount-dyn.S | 239 ++++++++++++++++++++++++++++++++++++++++
> arch/riscv/kernel/mcount.S | 22 ++--
> arch/riscv/kernel/stacktrace.c | 6 +
> scripts/recordmcount.pl | 5 +
> 9 files changed, 501 insertions(+), 13 deletions(-)
> create mode 100644 arch/riscv/kernel/mcount-dyn.S
>
> --
> 2.15.1
>

Any comments?

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