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

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Message-ID: <20140313113524.GF30339@arm.com>
Date:	Thu, 13 Mar 2014 11:35:24 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	"hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Will Deacon <Will.Deacon@....com>,
	"acme@...stprotocols.net" <acme@...stprotocols.net>,
	"jean.pihet@...aro.org" <jean.pihet@...aro.org>,
	"jolsa@...hat.com" <jolsa@...hat.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:perf/core] ARM64, perf: Add support for perf registers API

On Thu, Mar 13, 2014 at 11:01:21AM +0000, Ingo Molnar wrote:
> * Catalin Marinas <catalin.marinas@....com> wrote:
> > 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/...).
> 
> Well, I merged them so that the tooling bits can be tested on top of 
> that and merged as well.

That's why I asked if I should take the tooling bits but Will objected ;).

> Anyway, I dropped them, they were still the tail of tip:perf/core.

Thanks. I assume you still take the tooling patch?

-- 
Catalin
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