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a646ca099b
With the dynamic traceid allocation scheme in, we output the AUX_OUTPUT_HWID packet every time event->start() is called. This could cause too many such records in the perf.data, while only one per CPU throughout the life time of the event is required. Make sure we only output it once. Before this patch: $ perf report -D | grep OUTPUT_HW_ID ... AUX_OUTPUT_HW_ID events: 55 (18.3%) After this patch: $ perf report -D | grep OUTPUT_HW_ID ... AUX_OUTPUT_HW_ID events: 5 ( 1.9%) Cc: Mike Leach <mike.leach@linaro.org> Cc: James Clark <james.clark@arm.com> Cc: Leo Yan <leo.yan@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: James Clark <james.clark@arm.com> Link: https://lore.kernel.org/r/20230120103434.864318-1-suzuki.poulose@arm.com
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright(C) 2015 Linaro Limited. All rights reserved.
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*/
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#ifndef _CORESIGHT_ETM_PERF_H
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#define _CORESIGHT_ETM_PERF_H
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#include <linux/percpu-defs.h>
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#include "coresight-priv.h"
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struct coresight_device;
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struct cscfg_config_desc;
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/*
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* In both ETMv3 and v4 the maximum number of address comparator implentable
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* is 8. The actual number is implementation specific and will be checked
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* when filters are applied.
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*/
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#define ETM_ADDR_CMP_MAX 8
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/**
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* struct etm_filter - single instruction range or start/stop configuration.
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* @start_addr: The address to start tracing on.
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* @stop_addr: The address to stop tracing on.
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* @type: Is this a range or start/stop filter.
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*/
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struct etm_filter {
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unsigned long start_addr;
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unsigned long stop_addr;
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enum etm_addr_type type;
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};
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/**
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* struct etm_filters - set of filters for a session
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* @etm_filter: All the filters for this session.
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* @nr_filters: Number of filters
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* @ssstatus: Status of the start/stop logic.
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*/
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struct etm_filters {
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struct etm_filter etm_filter[ETM_ADDR_CMP_MAX];
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unsigned int nr_filters;
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bool ssstatus;
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};
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/**
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* struct etm_event_data - Coresight specifics associated to an event
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* @work: Handle to free allocated memory outside IRQ context.
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* @mask: Hold the CPU(s) this event was set for.
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* @aux_hwid_done: Whether a CPU has emitted the TraceID packet or not.
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* @snk_config: The sink configuration.
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* @cfg_hash: The hash id of any coresight config selected.
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* @path: An array of path, each slot for one CPU.
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*/
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struct etm_event_data {
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struct work_struct work;
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cpumask_t mask;
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cpumask_t aux_hwid_done;
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void *snk_config;
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u32 cfg_hash;
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struct list_head * __percpu *path;
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};
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#if IS_ENABLED(CONFIG_CORESIGHT)
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int etm_perf_symlink(struct coresight_device *csdev, bool link);
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int etm_perf_add_symlink_sink(struct coresight_device *csdev);
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void etm_perf_del_symlink_sink(struct coresight_device *csdev);
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static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
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{
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struct etm_event_data *data = perf_get_aux(handle);
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if (data)
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return data->snk_config;
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return NULL;
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}
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int etm_perf_add_symlink_cscfg(struct device *dev,
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struct cscfg_config_desc *config_desc);
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void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc);
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#else
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static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
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{ return -EINVAL; }
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int etm_perf_add_symlink_sink(struct coresight_device *csdev)
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{ return -EINVAL; }
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void etm_perf_del_symlink_sink(struct coresight_device *csdev) {}
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static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
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{
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return NULL;
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}
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int etm_perf_add_symlink_cscfg(struct device *dev,
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struct cscfg_config_desc *config_desc)
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{ return -EINVAL; }
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void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc) {}
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#endif /* CONFIG_CORESIGHT */
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int __init etm_perf_init(void);
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void etm_perf_exit(void);
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#endif
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