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0ca2c45404
The first version's metadata header structure doesn't include a field to indicate a header version, which is not friendly for extension. Define the metadata version 2 format with a new header structure and extend per CPU's metadata. In the meantime, the old metadata header will still be supported for backward compatibility. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: James Clark <james.clark@linaro.org> Cc: Will Deacon <will@kernel.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Besar Wicaksono <bwicaksono@nvidia.com> Cc: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20241003184302.190806-2-leo.yan@arm.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Arm Statistical Profiling Extensions (SPE) support
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* Copyright (c) 2017-2018, Arm Ltd.
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*/
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#ifndef INCLUDE__PERF_ARM_SPE_H__
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#define INCLUDE__PERF_ARM_SPE_H__
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#define ARM_SPE_PMU_NAME "arm_spe_"
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enum {
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ARM_SPE_PMU_TYPE,
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ARM_SPE_PER_CPU_MMAPS,
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ARM_SPE_AUXTRACE_V1_PRIV_MAX,
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};
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#define ARM_SPE_AUXTRACE_V1_PRIV_SIZE \
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(ARM_SPE_AUXTRACE_V1_PRIV_MAX * sizeof(u64))
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enum {
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/*
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* The old metadata format (defined above) does not include a
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* field for version number. Version 1 is reserved and starts
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* from version 2.
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*/
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ARM_SPE_HEADER_VERSION,
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/* Number of sizeof(u64) */
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ARM_SPE_HEADER_SIZE,
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/* PMU type shared by CPUs */
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ARM_SPE_PMU_TYPE_V2,
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/* Number of CPUs */
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ARM_SPE_CPUS_NUM,
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ARM_SPE_AUXTRACE_PRIV_MAX,
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};
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enum {
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/* Magic number */
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ARM_SPE_MAGIC,
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/* CPU logical number in system */
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ARM_SPE_CPU,
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/* Number of parameters */
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ARM_SPE_CPU_NR_PARAMS,
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/* CPU MIDR */
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ARM_SPE_CPU_MIDR,
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/* Associated PMU type */
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ARM_SPE_CPU_PMU_TYPE,
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/* Minimal interval */
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ARM_SPE_CAP_MIN_IVAL,
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ARM_SPE_CPU_PRIV_MAX,
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};
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#define ARM_SPE_HEADER_CURRENT_VERSION 2
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union perf_event;
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struct perf_session;
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struct perf_pmu;
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struct auxtrace_record *arm_spe_recording_init(int *err,
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struct perf_pmu *arm_spe_pmu);
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int arm_spe_process_auxtrace_info(union perf_event *event,
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struct perf_session *session);
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void arm_spe_pmu_default_config(const struct perf_pmu *arm_spe_pmu,
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struct perf_event_attr *attr);
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#endif
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