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SubjectRe: [patches] [PATCH v4 0/6] Add dynamic ftrace support for RISC-V platforms
On Thu, Feb 22, 2018 at 12:05:11AM +0800, Palmer Dabbelt wrote:
> On Mon, 12 Feb 2018 21:13:15 PST (-0800), alankao@andestech.com 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
>
> Thanks! I've added this to our for-next tree, it should be good to go for
> 4.17. Sorry this took a while, I'm still a bit behind from FOSDEM.

Thanks!

Alan

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