perf tools: Add perf pmu object to access pmu format definition
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>
diff --git a/tools/perf/util/pmu.l b/tools/perf/util/pmu.l
new file mode 100644
index 0000000..a15d9fb
--- /dev/null
+++ b/tools/perf/util/pmu.l
@@ -0,0 +1,43 @@
+%option prefix="perf_pmu_"
+
+%{
+#include <stdlib.h>
+#include <linux/bitops.h>
+#include "pmu.h"
+#include "pmu-bison.h"
+
+static int value(int base)
+{
+ long num;
+
+ errno = 0;
+ num = strtoul(perf_pmu_text, NULL, base);
+ if (errno)
+ return PP_ERROR;
+
+ perf_pmu_lval.num = num;
+ return PP_VALUE;
+}
+
+%}
+
+num_dec [0-9]+
+
+%%
+
+{num_dec} { return value(10); }
+config { return PP_CONFIG; }
+config1 { return PP_CONFIG1; }
+config2 { return PP_CONFIG2; }
+- { return '-'; }
+: { return ':'; }
+, { return ','; }
+. { ; }
+\n { ; }
+
+%%
+
+int perf_pmu_wrap(void)
+{
+ return 1;
+}