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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>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef __PERF_EVSEL_CONFIG_H
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#define __PERF_EVSEL_CONFIG_H 1
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#include <linux/types.h>
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#include <stdbool.h>
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/*
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* The 'struct perf_evsel_config_term' is used to pass event
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* specific configuration data to perf_evsel__config routine.
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* It is allocated within event parsing and attached to
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* perf_evsel::config_terms list head.
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*/
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enum evsel_term_type {
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PERF_EVSEL__CONFIG_TERM_PERIOD,
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PERF_EVSEL__CONFIG_TERM_FREQ,
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PERF_EVSEL__CONFIG_TERM_TIME,
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PERF_EVSEL__CONFIG_TERM_CALLGRAPH,
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PERF_EVSEL__CONFIG_TERM_STACK_USER,
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PERF_EVSEL__CONFIG_TERM_INHERIT,
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PERF_EVSEL__CONFIG_TERM_MAX_STACK,
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PERF_EVSEL__CONFIG_TERM_MAX_EVENTS,
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PERF_EVSEL__CONFIG_TERM_OVERWRITE,
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PERF_EVSEL__CONFIG_TERM_DRV_CFG,
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PERF_EVSEL__CONFIG_TERM_BRANCH,
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PERF_EVSEL__CONFIG_TERM_PERCORE,
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PERF_EVSEL__CONFIG_TERM_AUX_OUTPUT,
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PERF_EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE,
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PERF_EVSEL__CONFIG_TERM_CFG_CHG,
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};
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struct perf_evsel_config_term {
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struct list_head list;
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enum evsel_term_type type;
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union {
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u64 period;
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u64 freq;
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bool time;
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char *callgraph;
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char *drv_cfg;
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u64 stack_user;
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int max_stack;
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bool inherit;
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bool overwrite;
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char *branch;
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unsigned long max_events;
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bool percore;
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bool aux_output;
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u32 aux_sample_size;
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u64 cfg_chg;
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} val;
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bool weak;
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};
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struct evsel;
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struct perf_evsel_config_term *__perf_evsel__get_config_term(struct evsel *evsel,
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enum evsel_term_type type);
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#define perf_evsel__get_config_term(evsel, type) \
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__perf_evsel__get_config_term(evsel, PERF_EVSEL__CONFIG_TERM_ ## type)
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#endif // __PERF_EVSEL_CONFIG_H
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