linux-kernel - Re: [tip:perf/core] ARM64, perf: Add support for perf registers API

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Date:	Thu, 13 Mar 2014 10:19:07 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	will.deacon@....com, acme@...stprotocols.net,
	jean.pihet@...aro.org, jolsa@...hat.com, tglx@...utronix.de
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] ARM64, perf: Add support for perf registers API

Hi Ingo,

On Thu, Mar 13, 2014 at 12:27:45AM -0700, tip-bot for Jean Pihet wrote:
> Commit-ID:  1acfb01a43db9d8cde2d4c1d51746bae0b46b06b
> Gitweb:     http://git.kernel.org/tip/1acfb01a43db9d8cde2d4c1d51746bae0b46b06b
> Author:     Jean Pihet <jean.pihet@...aro.org>
> AuthorDate: Mon, 3 Feb 2014 19:18:27 +0100
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Wed, 12 Mar 2014 13:45:28 +0100
> 
> ARM64, perf: Add support for perf registers API
> 
> This patch implements the functions required for the perf
> registers API, allowing the perf tool to interface kernel
> register dumps with libunwind in order to provide userspace
> backtracing. Compat mode is also supported.
> 
> Only the general purpose user space registers are exported,
> i.e.:  PERF_REG_ARM_X0,
>  ...
>  PERF_REG_ARM_X28,
>  PERF_REG_ARM_FP,
>  PERF_REG_ARM_LR,
>  PERF_REG_ARM_SP,
>  PERF_REG_ARM_PC
> and not the PERF_REG_ARM_V* registers.
> 
> Signed-off-by: Jean Pihet <jean.pihet@...aro.org>
> Acked-by: Will Deacon <will.deacon@....com>
> Cc: Arnaldo <acme@...stprotocols.net>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: patches@...aro.org
> Cc: linaro-kernel@...ts.linaro.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Link: http://lkml.kernel.org/r/1391451509-31265-2-git-send-email-jean.pihet@linaro.org
> Signed-off-by: Ingo Molnar <mingo@...nel.org>
> ---
>  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_regs.c           | 44 +++++++++++++++++++++++++++++++++
>  6 files changed, 89 insertions(+)

As I replied to Jean yesterday, I merged the arch/arm64 patches already
in the arm64 tree. Is it late to drop them from tip (and avoid potential
conflicts)?

But please take the perf tools patch (tools/perf/arch/arm64/...).

Thanks.

-- 
Catalin
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