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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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cd82a32e99
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>
44 lines
571 B
Plaintext
44 lines
571 B
Plaintext
%option prefix="perf_pmu_"
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%{
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#include <stdlib.h>
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#include <linux/bitops.h>
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#include "pmu.h"
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#include "pmu-bison.h"
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static int value(int base)
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{
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long num;
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errno = 0;
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num = strtoul(perf_pmu_text, NULL, base);
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if (errno)
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return PP_ERROR;
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perf_pmu_lval.num = num;
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return PP_VALUE;
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}
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%}
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num_dec [0-9]+
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%%
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{num_dec} { return value(10); }
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config { return PP_CONFIG; }
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config1 { return PP_CONFIG1; }
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config2 { return PP_CONFIG2; }
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- { return '-'; }
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: { return ':'; }
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, { return ','; }
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. { ; }
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\n { ; }
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%%
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int perf_pmu_wrap(void)
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{
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return 1;
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}
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