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

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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a818c563
...@@ -86,6 +86,7 @@ libperf-y += term.o ...@@ -86,6 +86,7 @@ libperf-y += term.o
libperf-y += help-unknown-cmd.o libperf-y += help-unknown-cmd.o
libperf-y += mem-events.o libperf-y += mem-events.o
libperf-y += vsprintf.o libperf-y += vsprintf.o
libperf-y += drv_configs.o
libperf-$(CONFIG_LIBBPF) += bpf-loader.o libperf-$(CONFIG_LIBBPF) += bpf-loader.o
libperf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o libperf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
......
/*
* 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;
}
/*
* 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
...@@ -4,6 +4,7 @@ ...@@ -4,6 +4,7 @@
#include <linux/bitmap.h> #include <linux/bitmap.h>
#include <linux/perf_event.h> #include <linux/perf_event.h>
#include <stdbool.h> #include <stdbool.h>
#include "evsel.h"
#include "parse-events.h" #include "parse-events.h"
enum { enum {
...@@ -25,6 +26,7 @@ struct perf_pmu { ...@@ -25,6 +26,7 @@ struct perf_pmu {
struct list_head format; /* HEAD struct perf_pmu_format -> list */ struct list_head format; /* HEAD struct perf_pmu_format -> list */
struct list_head aliases; /* HEAD struct perf_pmu_alias -> list */ struct list_head aliases; /* HEAD struct perf_pmu_alias -> list */
struct list_head list; /* ELEM */ struct list_head list; /* ELEM */
int (*set_drv_config) (struct perf_evsel_config_term *term);
}; };
struct perf_pmu_info { struct perf_pmu_info {
......
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