// SPDX-License-Identifier: GPL-2.0-only /* * auxtrace.c: AUX area tracing support * Copyright (c) 2013-2014, Intel Corporation. */ #include <errno.h> #include <stdbool.h> #include "../../util/header.h" #include "../../util/debug.h" #include "../../util/pmu.h" #include "../../util/auxtrace.h" #include "../../util/intel-pt.h" #include "../../util/intel-bts.h" #include "../../util/evlist.h" static struct auxtrace_record *auxtrace_record__init_intel(struct perf_evlist *evlist, int *err) { struct perf_pmu *intel_pt_pmu; struct perf_pmu *intel_bts_pmu; struct perf_evsel *evsel; bool found_pt = false; bool found_bts = false; intel_pt_pmu = perf_pmu__find(INTEL_PT_PMU_NAME); intel_bts_pmu = perf_pmu__find(INTEL_BTS_PMU_NAME); evlist__for_each_entry(evlist, evsel) { if (intel_pt_pmu && evsel->attr.type == intel_pt_pmu->type) found_pt = true; if (intel_bts_pmu && evsel->attr.type == intel_bts_pmu->type) found_bts = true; } if (found_pt && found_bts) { pr_err("intel_pt and intel_bts may not be used together\n"); *err = -EINVAL; return NULL; } if (found_pt) return intel_pt_recording_init(err); if (found_bts) return intel_bts_recording_init(err); return NULL; } struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist, int *err) { char buffer[64]; int ret; *err = 0; ret = get_cpuid(buffer, sizeof(buffer)); if (ret) { *err = ret; return NULL; } if (!strncmp(buffer, "GenuineIntel,", 13)) return auxtrace_record__init_intel(evlist, err); return NULL; }