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![Jiri Olsa](/assets/img/avatar_default.png)
Adding pmu object which provides interface to pmu's sysfs event format definition located at: ${sysfs_mount}/bus/event_source/devices/${pmu}/format Following interface is exported: struct perf_pmu* perf_pmu__find(char *name); - this function returns pmu object, which is then passed as a handle to other interface functions int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, struct list_head *head_terms); - this function configures perf_event_attr struct based on pmu's format definitions and config terms data, containined in head_terms list. Parser generator is used to retrive the pmu's format definition. The generated parser is part of the patch. Added makefile rule 'pmu-parser' to generate the parser code out of the bison/flex sources. Added builtin test 'Test perf pmu format parsing', which could be run like: perf test pmu Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-errz96u1668gj9wlop1zhpht@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
93 lines
1.3 KiB
Text
93 lines
1.3 KiB
Text
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%name-prefix "perf_pmu_"
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%parse-param {struct list_head *format}
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%parse-param {char *name}
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%{
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#include <linux/compiler.h>
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#include <linux/list.h>
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#include <linux/bitmap.h>
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#include <string.h>
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#include "pmu.h"
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extern int perf_pmu_lex (void);
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#define ABORT_ON(val) \
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do { \
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if (val) \
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YYABORT; \
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} while (0)
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%}
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%token PP_CONFIG PP_CONFIG1 PP_CONFIG2
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%token PP_VALUE PP_ERROR
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%type <num> PP_VALUE
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%type <bits> bit_term
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%type <bits> bits
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%union
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{
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unsigned long num;
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DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
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}
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%%
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format:
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format format_term
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format_term
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format_term:
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PP_CONFIG ':' bits
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{
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ABORT_ON(perf_pmu__new_format(format, name,
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PERF_PMU_FORMAT_VALUE_CONFIG,
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$3));
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}
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PP_CONFIG1 ':' bits
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{
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ABORT_ON(perf_pmu__new_format(format, name,
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PERF_PMU_FORMAT_VALUE_CONFIG1,
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$3));
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}
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PP_CONFIG2 ':' bits
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{
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ABORT_ON(perf_pmu__new_format(format, name,
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PERF_PMU_FORMAT_VALUE_CONFIG2,
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$3));
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}
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bits:
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bits ',' bit_term
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{
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bitmap_or($$, $1, $3, 64);
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}
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bit_term
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{
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memcpy($$, $1, sizeof($1));
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}
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bit_term:
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PP_VALUE '-' PP_VALUE
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{
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perf_pmu__set_format($$, $1, $3);
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}
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PP_VALUE
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{
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perf_pmu__set_format($$, $1, 0);
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}
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%%
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void perf_pmu_error(struct list_head *list __used,
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char *name __used,
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char const *msg __used)
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{
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}
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