// 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/pmus.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 evlist *evlist,
                                                    int *err)
{
        struct perf_pmu *intel_pt_pmu;
        struct perf_pmu *intel_bts_pmu;
        struct evsel *evsel;
        bool found_pt = false;
        bool found_bts = false;

        intel_pt_pmu = perf_pmus__find(INTEL_PT_PMU_NAME);
        intel_bts_pmu = perf_pmus__find(INTEL_BTS_PMU_NAME);

        evlist__for_each_entry(evlist, evsel) {
                if (intel_pt_pmu && evsel->core.attr.type == intel_pt_pmu->type)
                        found_pt = true;
                if (intel_bts_pmu && evsel->core.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 evlist *evlist,
                                              int *err)
{
        char buffer[64];
        struct perf_cpu cpu = perf_cpu_map__min(evlist->core.all_cpus);
        int ret;

        *err = 0;

        ret = get_cpuid(buffer, sizeof(buffer), cpu);
        if (ret) {
                *err = ret;
                return NULL;
        }

        if (!strncmp(buffer, "GenuineIntel,", 13))
                return auxtrace_record__init_intel(evlist, err);

        return NULL;
}