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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/arch/arm/util/auxtrace.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/arch/arm/util/auxtrace.c')
-rw-r--r-- | tools/perf/arch/arm/util/auxtrace.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c new file mode 100644 index 000000000..b187bddbd --- /dev/null +++ b/tools/perf/arch/arm/util/auxtrace.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright(C) 2015 Linaro Limited. All rights reserved. + * Author: Mathieu Poirier <mathieu.poirier@linaro.org> + */ + +#include <stdbool.h> +#include <linux/coresight-pmu.h> +#include <linux/zalloc.h> + +#include "../../util/auxtrace.h" +#include "../../util/debug.h" +#include "../../util/evlist.h" +#include "../../util/pmu.h" +#include "cs-etm.h" +#include "arm-spe.h" + +static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) +{ + struct perf_pmu **arm_spe_pmus = NULL; + int ret, i, nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + /* arm_spe_xxxxxxxxx\0 */ + char arm_spe_pmu_name[sizeof(ARM_SPE_PMU_NAME) + 10]; + + arm_spe_pmus = zalloc(sizeof(struct perf_pmu *) * nr_cpus); + if (!arm_spe_pmus) { + pr_err("spes alloc failed\n"); + *err = -ENOMEM; + return NULL; + } + + for (i = 0; i < nr_cpus; i++) { + ret = sprintf(arm_spe_pmu_name, "%s%d", ARM_SPE_PMU_NAME, i); + if (ret < 0) { + pr_err("sprintf failed\n"); + *err = -ENOMEM; + return NULL; + } + + arm_spe_pmus[*nr_spes] = perf_pmu__find(arm_spe_pmu_name); + if (arm_spe_pmus[*nr_spes]) { + pr_debug2("%s %d: arm_spe_pmu %d type %d name %s\n", + __func__, __LINE__, *nr_spes, + arm_spe_pmus[*nr_spes]->type, + arm_spe_pmus[*nr_spes]->name); + (*nr_spes)++; + } + } + + return arm_spe_pmus; +} + +struct auxtrace_record +*auxtrace_record__init(struct evlist *evlist, int *err) +{ + struct perf_pmu *cs_etm_pmu; + struct evsel *evsel; + bool found_etm = false; + struct perf_pmu *found_spe = NULL; + struct perf_pmu **arm_spe_pmus = NULL; + int nr_spes = 0; + int i = 0; + + if (!evlist) + return NULL; + + cs_etm_pmu = perf_pmu__find(CORESIGHT_ETM_PMU_NAME); + arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err); + + evlist__for_each_entry(evlist, evsel) { + if (cs_etm_pmu && + evsel->core.attr.type == cs_etm_pmu->type) + found_etm = true; + + if (!nr_spes || found_spe) + continue; + + for (i = 0; i < nr_spes; i++) { + if (evsel->core.attr.type == arm_spe_pmus[i]->type) { + found_spe = arm_spe_pmus[i]; + break; + } + } + } + free(arm_spe_pmus); + + if (found_etm && found_spe) { + pr_err("Concurrent ARM Coresight ETM and SPE operation not currently supported\n"); + *err = -EOPNOTSUPP; + return NULL; + } + + if (found_etm) + return cs_etm_record_init(err); + +#if defined(__aarch64__) + if (found_spe) + return arm_spe_recording_init(err, found_spe); +#endif + + /* + * Clear 'err' even if we haven't found an event - that way perf + * record can still be used even if tracers aren't present. The NULL + * return value will take care of telling the infrastructure HW tracing + * isn't available. + */ + *err = 0; + return NULL; +} |