1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * auxtrace.c: AUX area tracing support
4*4882a593Smuzhiyun * Copyright (c) 2013-2014, Intel Corporation.
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <errno.h>
8*4882a593Smuzhiyun #include <stdbool.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "../../../util/header.h"
11*4882a593Smuzhiyun #include "../../../util/debug.h"
12*4882a593Smuzhiyun #include "../../../util/pmu.h"
13*4882a593Smuzhiyun #include "../../../util/auxtrace.h"
14*4882a593Smuzhiyun #include "../../../util/intel-pt.h"
15*4882a593Smuzhiyun #include "../../../util/intel-bts.h"
16*4882a593Smuzhiyun #include "../../../util/evlist.h"
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun static
auxtrace_record__init_intel(struct evlist * evlist,int * err)19*4882a593Smuzhiyun struct auxtrace_record *auxtrace_record__init_intel(struct evlist *evlist,
20*4882a593Smuzhiyun int *err)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun struct perf_pmu *intel_pt_pmu;
23*4882a593Smuzhiyun struct perf_pmu *intel_bts_pmu;
24*4882a593Smuzhiyun struct evsel *evsel;
25*4882a593Smuzhiyun bool found_pt = false;
26*4882a593Smuzhiyun bool found_bts = false;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun intel_pt_pmu = perf_pmu__find(INTEL_PT_PMU_NAME);
29*4882a593Smuzhiyun if (intel_pt_pmu)
30*4882a593Smuzhiyun intel_pt_pmu->auxtrace = true;
31*4882a593Smuzhiyun intel_bts_pmu = perf_pmu__find(INTEL_BTS_PMU_NAME);
32*4882a593Smuzhiyun if (intel_bts_pmu)
33*4882a593Smuzhiyun intel_bts_pmu->auxtrace = true;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun evlist__for_each_entry(evlist, evsel) {
36*4882a593Smuzhiyun if (intel_pt_pmu && evsel->core.attr.type == intel_pt_pmu->type)
37*4882a593Smuzhiyun found_pt = true;
38*4882a593Smuzhiyun if (intel_bts_pmu && evsel->core.attr.type == intel_bts_pmu->type)
39*4882a593Smuzhiyun found_bts = true;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if (found_pt && found_bts) {
43*4882a593Smuzhiyun pr_err("intel_pt and intel_bts may not be used together\n");
44*4882a593Smuzhiyun *err = -EINVAL;
45*4882a593Smuzhiyun return NULL;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (found_pt)
49*4882a593Smuzhiyun return intel_pt_recording_init(err);
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun if (found_bts)
52*4882a593Smuzhiyun return intel_bts_recording_init(err);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun return NULL;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
auxtrace_record__init(struct evlist * evlist,int * err)57*4882a593Smuzhiyun struct auxtrace_record *auxtrace_record__init(struct evlist *evlist,
58*4882a593Smuzhiyun int *err)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun char buffer[64];
61*4882a593Smuzhiyun int ret;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun *err = 0;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun ret = get_cpuid(buffer, sizeof(buffer));
66*4882a593Smuzhiyun if (ret) {
67*4882a593Smuzhiyun *err = ret;
68*4882a593Smuzhiyun return NULL;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun if (!strncmp(buffer, "GenuineIntel,", 13))
72*4882a593Smuzhiyun return auxtrace_record__init_intel(evlist, err);
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun return NULL;
75*4882a593Smuzhiyun }
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