1 /*
2 * drv_configs.h: Interface to apply PMU specific configuration
3 * Copyright (c) 2016-2018, Linaro Ltd.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 */
15
16 #include "drv_configs.h"
17 #include "evlist.h"
18 #include "evsel.h"
19 #include "pmu.h"
20 #include <errno.h>
21
22 static int
perf_evsel__apply_drv_configs(struct perf_evsel * evsel,struct perf_evsel_config_term ** err_term)23 perf_evsel__apply_drv_configs(struct perf_evsel *evsel,
24 struct perf_evsel_config_term **err_term)
25 {
26 bool found = false;
27 int err = 0;
28 struct perf_evsel_config_term *term;
29 struct perf_pmu *pmu = NULL;
30
31 while ((pmu = perf_pmu__scan(pmu)) != NULL)
32 if (pmu->type == evsel->attr.type) {
33 found = true;
34 break;
35 }
36
37 list_for_each_entry(term, &evsel->config_terms, list) {
38 if (term->type != PERF_EVSEL__CONFIG_TERM_DRV_CFG)
39 continue;
40
41 /*
42 * We have a configuration term, report an error if we
43 * can't find the PMU or if the PMU driver doesn't support
44 * cmd line driver configuration.
45 */
46 if (!found || !pmu->set_drv_config) {
47 err = -EINVAL;
48 *err_term = term;
49 break;
50 }
51
52 err = pmu->set_drv_config(term);
53 if (err) {
54 *err_term = term;
55 break;
56 }
57 }
58
59 return err;
60 }
61
perf_evlist__apply_drv_configs(struct perf_evlist * evlist,struct perf_evsel ** err_evsel,struct perf_evsel_config_term ** err_term)62 int perf_evlist__apply_drv_configs(struct perf_evlist *evlist,
63 struct perf_evsel **err_evsel,
64 struct perf_evsel_config_term **err_term)
65 {
66 struct perf_evsel *evsel;
67 int err = 0;
68
69 evlist__for_each_entry(evlist, evsel) {
70 err = perf_evsel__apply_drv_configs(evsel, err_term);
71 if (err) {
72 *err_evsel = evsel;
73 break;
74 }
75 }
76
77 return err;
78 }
79