linux-kernel - Re: [PATCH 01/17] perf: Unified API to record selective sets of arch registers

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Message-ID: <20120729224552.GA21364@bloggs.ozlabs.ibm.com>
Date:	Mon, 30 Jul 2012 08:45:52 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:	Jiri Olsa <jolsa@...hat.com>, Anton Blanchard <anton@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	a.p.zijlstra@...llo.nl, mingo@...nel.org,
	cjashfor@...ux.vnet.ibm.com, fweisbec@...il.com,
	eranian@...gle.com, gorcunov@...nvz.org, tzanussi@...il.com,
	robert.richter@....com, fche@...hat.com,
	linux-kernel@...r.kernel.org, masami.hiramatsu.pt@...achi.com,
	drepper@...il.com, asharma@...com, benjamin.redelings@...cent.org
Subject: Re: [PATCH 01/17] perf: Unified API to record selective sets of arch
 registers

On Thu, Jul 26, 2012 at 02:51:04PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sun, Jul 22, 2012 at 02:14:24PM +0200, Jiri Olsa escreveu:
> > This brings a new API to help the selective dump of registers on
> > event sampling, and its implementation for x86 arch.
> > 
> > Added HAVE_PERF_REGS config option to determine if the architecture
> > provides perf registers ABI.
> > 
> > The information about desired registers will be passed in u64 mask.
> > It's up to the architecture to map the registers into the mask bits.
> > 
> > For the x86 arch implementation, both 32 and 64 bit registers
> > bits are defined within single enum to ensure 64 bit system can
> > provide register dump for compat task if needed in the future.
> 
> 
> Anton, Paul, Ben,
> 
> 	Does this look OK for PPC?

Yes, it looks fine.  I assume we only want integer regs here, not
floating-point or vector regs.

Paul.
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