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Commit 859442bd authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Arnaldo Carvalho de Melo
Browse files

perf pmu: Push configuration down to PMU driver 



This patch adds a PMU callback and the required mechanic so that drivers
can process the command line configuration elements found in
evsel::config_terms.

Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1474041004-13956-6-git-send-email-mathieu.poirier@linaro.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a818c563

tools/perf/util/Build

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ libperf-y += term.o 
libperf-y += help-unknown-cmd.o

libperf-y += mem-events.o

libperf-y += vsprintf.o

libperf-y += drv_configs.o



libperf-$(CONFIG_LIBBPF) += bpf-loader.o

libperf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o

tools/perf/util/drv_configs.c

0 → 100644
+77 −0
Original line number Diff line number Diff line 
/*

 * drv_configs.h: Interface to apply PMU specific configuration

 * Copyright (c) 2016-2018, Linaro Ltd.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 */



#include "drv_configs.h"

#include "evlist.h"

#include "evsel.h"

#include "pmu.h"



static int

perf_evsel__apply_drv_configs(struct perf_evsel *evsel,

			      struct perf_evsel_config_term **err_term)

{

	bool found = false;

	int err = 0;

	struct perf_evsel_config_term *term;

	struct perf_pmu *pmu = NULL;



	while ((pmu = perf_pmu__scan(pmu)) != NULL)

		if (pmu->type == evsel->attr.type) {

			found = true;

			break;

		}



	list_for_each_entry(term, &evsel->config_terms, list) {

		if (term->type != PERF_EVSEL__CONFIG_TERM_DRV_CFG)

			continue;



		/*

		 * We have a configuration term, report an error if we

		 * can't find the PMU or if the PMU driver doesn't support

		 * cmd line driver configuration.

		 */

		if (!found || !pmu->set_drv_config) {

			err = -EINVAL;

			*err_term = term;

			break;

		}



		err = pmu->set_drv_config(term);

		if (err) {

			*err_term = term;

			break;

		}

	}



	return err;

}



int perf_evlist__apply_drv_configs(struct perf_evlist *evlist,

				   struct perf_evsel **err_evsel,

				   struct perf_evsel_config_term **err_term)

{

	struct perf_evsel *evsel;

	int err = 0;



	evlist__for_each_entry(evlist, evsel) {

		err = perf_evsel__apply_drv_configs(evsel, err_term);

		if (err) {

			*err_evsel = evsel;

			break;

		}

	}



	return err;

}

tools/perf/util/drv_configs.h

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/*

 * drv_configs.h: Interface to apply PMU specific configuration

 * Copyright (c) 2016-2018, Linaro Ltd.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 */



#ifndef __PERF_DRV_CONFIGS_H

#define __PERF_DRV_CONFIGS_H



#include "drv_configs.h"

#include "evlist.h"

#include "evsel.h"



int perf_evlist__apply_drv_configs(struct perf_evlist *evlist,

				   struct perf_evsel **err_evsel,

				   struct perf_evsel_config_term **term);

#endif

tools/perf/util/pmu.h

+2 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
#include <linux/bitmap.h>

#include <linux/perf_event.h>

#include <stdbool.h>

#include "evsel.h"

#include "parse-events.h"



enum {
@@ -25,6 +26,7 @@ struct perf_pmu { 
	struct list_head format;  /* HEAD struct perf_pmu_format -> list */

	struct list_head aliases; /* HEAD struct perf_pmu_alias -> list */

	struct list_head list;    /* ELEM */

	int (*set_drv_config)	(struct perf_evsel_config_term *term);

};



struct perf_pmu_info {