linux-kernel - Re: [PATCH V3 3/6] perf tools: add infrastructure for PMU specific configuration

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Date:	Sun, 31 Jul 2016 14:02:19 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:	acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
	mingo@...hat.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V3 3/6] perf tools: add infrastructure for PMU specific
 configuration

On Thu, Jul 28, 2016 at 03:42:20PM -0600, Mathieu Poirier wrote:
> This patch adds PMU driver specific configuration to the parser
> infrastructure by preceding any term with the '@' letter.  As such
> doing something like:
> 
> perf record -e some_event/@...1,@cfg2=config/ ...
> 
> will see 'cfg1' and 'cfg2=config' being added to the list of evsel config
> terms.  Token 'cfg1' and 'cfg2=config' are not processed in user space
> and are meant to be interpreted by the PMU driver.
> 
> First the lexer/parser are supplemented with the required definitions to
> recognise the driver specific configuration.  From there they are simply
> added to the list of event terms.  The bulk of the work is done in
> function "parse_events_add_pmu()" where driver config event terms are
> added to a new list of driver config terms, which in turn spliced with
> the event's new driver configuration list.
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka