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cec0d6572a
ARM BIG.little has no notion of a constant CPUID for both core types. To reflect this reality, change the get_cpuid function to also pass in a possibly unused logical cpu. If the dummy value (-1) is passed in then ARM can, as currently happens, select the first logical CPU's "CPUID". The changes to ARM getcpuid happen in a follow up change. Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Xu Yang <xu.yang_2@nxp.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Ben Zong-You Xie <ben717@andestech.com> Cc: Benjamin Gray <bgray@linux.ibm.com> Cc: Bibo Mao <maobibo@loongson.cn> Cc: Clément Le Goffic <clement.legoffic@foss.st.com> Cc: Dima Kogan <dima@secretsauce.net> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Will Deacon <will@kernel.org> Cc: Yicong Yang <yangyicong@hisilicon.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-riscv@lists.infradead.org Link: https://lore.kernel.org/r/20241107162035.52206-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
73 lines
1.6 KiB
C
73 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/pmus.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_pmus__find(INTEL_PT_PMU_NAME);
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intel_bts_pmu = perf_pmus__find(INTEL_BTS_PMU_NAME);
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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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struct perf_cpu cpu = perf_cpu_map__min(evlist->core.all_cpus);
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int ret;
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*err = 0;
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ret = get_cpuid(buffer, sizeof(buffer), cpu);
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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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