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