From: Ingo Molnar <mingo@kernel.org>
To: jean.pihet@linaro.org, Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org,
Arnaldo <acme@ghostprotocols.net>,
Will Deacon <will.deacon@arm.com>,
patches@linaro.org, Jiri Olsa <jolsa@redhat.com>
Subject: Re: [PATCH 0/3] ARM64: add perf support
Date: Tue, 17 Dec 2013 11:45:34 +0100 [thread overview]
Message-ID: <20131217104534.GA27383@gmail.com> (raw)
In-Reply-To: <52af2f21.41590e0a.0251.ffffd94c@mx.google.com>
* jean.pihet@linaro.org <jean.pihet@linaro.org> wrote:
> From: Jean Pihet <jean.pihet@linaro.org>
>
> Add perf support for the AARCH64 architecture. This includes the
> support for:
> - AARCH64 perf registers definition and hooks,
> - compat mode registers use, i.e. profiling a 32-bit binary on
> a 64-bit system,
> - unwinding using the dwarf information from the .debug_frame
> section of the ELF binary; only in 64-bit mode,
> - unwinding using the frame pointer information; in 64-bit and
> compat modes.
>
> ToDo:
> - add support for unwinding using the dwarf information in compat
> mode. This requires some changes to the libunwind code.
>
> Tested on ARMv7 and ARMv8 platforms. The compat mode has been tested
> on ARMv8 using statically built 32-bit binaries.
>
>
> Jean Pihet (3):
> ARM64: perf: add support for perf registers API
> ARM64: perf: wire up perf_regs and unwind support
> ARM64: perf: add support for frame pointer unwinding in compat mode
>
> arch/arm64/Kconfig | 2 +
> arch/arm64/include/asm/ptrace.h | 1 +
> arch/arm64/include/uapi/asm/Kbuild | 1 +
> arch/arm64/include/uapi/asm/perf_regs.h | 40 ++++++++++++++
> arch/arm64/kernel/Makefile | 1 +
> arch/arm64/kernel/perf_event.c | 75 +++++++++++++++++++++++---
> arch/arm64/kernel/perf_regs.c | 46 ++++++++++++++++
> tools/perf/arch/arm64/Makefile | 7 +++
> tools/perf/arch/arm64/include/perf_regs.h | 88 +++++++++++++++++++++++++++++++
> tools/perf/arch/arm64/util/dwarf-regs.c | 81 ++++++++++++++++++++++++++++
> tools/perf/arch/arm64/util/unwind.c | 82 ++++++++++++++++++++++++++++
> tools/perf/config/Makefile | 8 ++-
> 12 files changed, 423 insertions(+), 9 deletions(-)
> create mode 100644 arch/arm64/include/uapi/asm/perf_regs.h
> create mode 100644 arch/arm64/kernel/perf_regs.c
> create mode 100644 tools/perf/arch/arm64/Makefile
> create mode 100644 tools/perf/arch/arm64/include/perf_regs.h
> create mode 100644 tools/perf/arch/arm64/util/dwarf-regs.c
> create mode 100644 tools/perf/arch/arm64/util/unwind.c
Arnaldo, AFAICS the main merging complexity will probably be on the
perf tooling side, so if you are happy with these bits, mind picking
them up into your tree?
Thanks,
Ingo
next prev parent reply other threads:[~2013-12-17 10:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-16 16:49 [PATCH 0/3] ARM64: add perf support jean.pihet
2013-12-17 10:45 ` Ingo Molnar [this message]
2013-12-17 11:01 ` Will Deacon
2013-12-17 11:08 ` Ingo Molnar
2013-12-30 16:28 ` Jean Pihet
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