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