1/*
2 * auxtrace.c: AUX area tracing support
3 * Copyright (c) 2013-2014, Intel Corporation.
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 <stdbool.h>
17
18#include "../../util/header.h"
19#include "../../util/debug.h"
20#include "../../util/pmu.h"
21#include "../../util/auxtrace.h"
22#include "../../util/intel-pt.h"
23#include "../../util/intel-bts.h"
24#include "../../util/evlist.h"
25
26static
27struct auxtrace_record *auxtrace_record__init_intel(struct perf_evlist *evlist,
28						    int *err)
29{
30	struct perf_pmu *intel_pt_pmu;
31	struct perf_pmu *intel_bts_pmu;
32	struct perf_evsel *evsel;
33	bool found_pt = false;
34	bool found_bts = false;
35
36	intel_pt_pmu = perf_pmu__find(INTEL_PT_PMU_NAME);
37	intel_bts_pmu = perf_pmu__find(INTEL_BTS_PMU_NAME);
38
39	if (evlist) {
40		evlist__for_each(evlist, evsel) {
41			if (intel_pt_pmu &&
42			    evsel->attr.type == intel_pt_pmu->type)
43				found_pt = true;
44			if (intel_bts_pmu &&
45			    evsel->attr.type == intel_bts_pmu->type)
46				found_bts = true;
47		}
48	}
49
50	if (found_pt && found_bts) {
51		pr_err("intel_pt and intel_bts may not be used together\n");
52		*err = -EINVAL;
53		return NULL;
54	}
55
56	if (found_pt)
57		return intel_pt_recording_init(err);
58
59	if (found_bts)
60		return intel_bts_recording_init(err);
61
62	return NULL;
63}
64
65struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
66					      int *err)
67{
68	char buffer[64];
69	int ret;
70
71	*err = 0;
72
73	ret = get_cpuid(buffer, sizeof(buffer));
74	if (ret) {
75		*err = ret;
76		return NULL;
77	}
78
79	if (!strncmp(buffer, "GenuineIntel,", 13))
80		return auxtrace_record__init_intel(evlist, err);
81
82	return NULL;
83}
84