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Commit 3becf452 authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Add sink configuration for cs_etm PMU 



Using the PMU::set_drv_config() callback to enable the CoreSight sink
that will be used for the trace session.

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/1474041004-13956-8-git-send-email-mathieu.poirier@linaro.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 5d8bb1ec

tools/perf/arch/arm/util/cs-etm.c

+58 −0
Original line number Original line Diff line number Diff line
@@ -27,12 +27,16 @@ 
#include "../../util/auxtrace.h"

#include "../../util/auxtrace.h"

#include "../../util/cpumap.h"

#include "../../util/cpumap.h"

#include "../../util/evlist.h"

#include "../../util/evlist.h"

#include "../../util/evsel.h"

#include "../../util/pmu.h"

#include "../../util/pmu.h"

#include "../../util/thread_map.h"

#include "../../util/thread_map.h"

#include "../../util/cs-etm.h"

#include "../../util/cs-etm.h"





#include <stdlib.h>

#include <stdlib.h>





#define ENABLE_SINK_MAX	128

#define CS_BUS_DEVICE_PATH "/bus/coresight/devices/"



struct cs_etm_recording {

struct cs_etm_recording {

	struct auxtrace_record	itr;

	struct auxtrace_record	itr;

	struct perf_pmu		*cs_etm_pmu;

	struct perf_pmu		*cs_etm_pmu;
@@ -557,3 +561,57 @@ struct auxtrace_record *cs_etm_record_init(int *err) 
out:

out:

	return NULL;

	return NULL;

}

}



static FILE *cs_device__open_file(const char *name)

{

	struct stat st;

	char path[PATH_MAX];

	const char *sysfs;



	sysfs = sysfs__mountpoint();

	if (!sysfs)

		return NULL;



	snprintf(path, PATH_MAX,

		 "%s" CS_BUS_DEVICE_PATH "%s", sysfs, name);



	printf("path: %s\n", path);



	if (stat(path, &st) < 0)

		return NULL;



	return fopen(path, "w");



}



static __attribute__((format(printf, 2, 3)))

int cs_device__print_file(const char *name, const char *fmt, ...)

{

	va_list args;

	FILE *file;

	int ret = -EINVAL;



	va_start(args, fmt);

	file = cs_device__open_file(name);

	if (file) {

		ret = vfprintf(file, fmt, args);

		fclose(file);

	}

	va_end(args);

	return ret;

}



int cs_etm_set_drv_config(struct perf_evsel_config_term *term)

{

	int ret;

	char enable_sink[ENABLE_SINK_MAX];



	snprintf(enable_sink, ENABLE_SINK_MAX, "%s/%s",

		 term->val.drv_cfg, "enable_sink");



	ret = cs_device__print_file(enable_sink, "%d", 1);

	if (ret < 0)

		return ret;



	return 0;

}

tools/perf/arch/arm/util/cs-etm.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -18,6 +18,9 @@ 
#ifndef INCLUDE__PERF_CS_ETM_H__

#ifndef INCLUDE__PERF_CS_ETM_H__

#define INCLUDE__PERF_CS_ETM_H__

#define INCLUDE__PERF_CS_ETM_H__





#include "../../util/evsel.h"



struct auxtrace_record *cs_etm_record_init(int *err);

struct auxtrace_record *cs_etm_record_init(int *err);

int cs_etm_set_drv_config(struct perf_evsel_config_term *term);





#endif
 
#endif

tools/perf/arch/arm/util/pmu.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/coresight-pmu.h>

#include <linux/coresight-pmu.h>

#include <linux/perf_event.h>

#include <linux/perf_event.h>





#include "cs-etm.h"

#include "../../util/pmu.h"

#include "../../util/pmu.h"





struct perf_event_attr

struct perf_event_attr
@@ -28,6 +29,7 @@ struct perf_event_attr 
	if (!strcmp(pmu->name, CORESIGHT_ETM_PMU_NAME)) {

	if (!strcmp(pmu->name, CORESIGHT_ETM_PMU_NAME)) {

		/* add ETM default config here */

		/* add ETM default config here */

		pmu->selectable = true;

		pmu->selectable = true;

		pmu->set_drv_config = cs_etm_set_drv_config;

	}

	}

#endif

#endif

	return NULL;

	return NULL;