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Default config for a PMU is defined before selected events are parsed. That allows the user-entered config to override the default config. However that does not allow for changing the default config based on other options. For example, if the user chooses AUX area sampling mode, in the case of Intel PT, the psb_period needs to be small for sampling, so there is a need to set the default psb_period to 0 (2 KiB) in that case. However that should not override a value set by the user. To allow for that, when using default config, record which bits of config were changed by the user. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20191115124225.5247-13-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PMU_H
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#define __PMU_H
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#include <linux/bitmap.h>
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#include <linux/compiler.h>
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#include <linux/perf_event.h>
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#include <stdbool.h>
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#include "parse-events.h"
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struct perf_evsel_config_term;
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enum {
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PERF_PMU_FORMAT_VALUE_CONFIG,
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PERF_PMU_FORMAT_VALUE_CONFIG1,
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PERF_PMU_FORMAT_VALUE_CONFIG2,
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};
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#define PERF_PMU_FORMAT_BITS 64
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#define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
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struct perf_event_attr;
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struct perf_pmu {
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char *name;
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__u32 type;
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bool selectable;
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bool is_uncore;
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bool auxtrace;
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int max_precise;
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struct perf_event_attr *default_config;
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struct perf_cpu_map *cpus;
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struct list_head format; /* HEAD struct perf_pmu_format -> list */
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struct list_head aliases; /* HEAD struct perf_pmu_alias -> list */
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struct list_head list; /* ELEM */
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};
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struct perf_pmu_info {
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const char *unit;
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const char *metric_expr;
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const char *metric_name;
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double scale;
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bool per_pkg;
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bool snapshot;
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};
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#define UNIT_MAX_LEN 31 /* max length for event unit name */
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struct perf_pmu_alias {
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char *name;
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char *desc;
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char *long_desc;
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char *topic;
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char *str;
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struct list_head terms; /* HEAD struct parse_events_term -> list */
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struct list_head list; /* ELEM */
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char unit[UNIT_MAX_LEN+1];
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double scale;
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bool per_pkg;
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bool snapshot;
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bool deprecated;
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char *metric_expr;
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char *metric_name;
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};
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struct perf_pmu *perf_pmu__find(const char *name);
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int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
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struct list_head *head_terms,
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struct parse_events_error *error);
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int perf_pmu__config_terms(struct list_head *formats,
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struct perf_event_attr *attr,
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struct list_head *head_terms,
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bool zero, struct parse_events_error *error);
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__u64 perf_pmu__format_bits(struct list_head *formats, const char *name);
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int perf_pmu__format_type(struct list_head *formats, const char *name);
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int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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struct perf_pmu_info *info);
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struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
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struct list_head *head_terms);
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int perf_pmu_wrap(void);
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void perf_pmu_error(struct list_head *list, char *name, char const *msg);
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int perf_pmu__new_format(struct list_head *list, char *name,
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int config, unsigned long *bits);
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void perf_pmu__set_format(unsigned long *bits, long from, long to);
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int perf_pmu__format_parse(char *dir, struct list_head *head);
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struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);
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void print_pmu_events(const char *event_glob, bool name_only, bool quiet,
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bool long_desc, bool details_flag,
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bool deprecated);
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bool pmu_have_event(const char *pname, const char *name);
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int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) __scanf(3, 4);
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int perf_pmu__test(void);
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struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);
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struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu);
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int perf_pmu__convert_scale(const char *scale, char **end, double *sval);
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#endif /* __PMU_H */
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