summaryrefslogtreecommitdiff
path: root/tools/perf/util/pmu.l
diff options
context:
space:
mode:
authorJiri Olsa <jolsa@redhat.com>2012-03-15 23:09:17 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-03-16 21:29:35 +0400
commitcd82a32e9924d3a82bd27f830755d23e4ded25bc (patch)
tree63ff4fe274d372c22de3937bb867cfe37c7737d6 /tools/perf/util/pmu.l
parent8f707d843c2f4023490a873dbc182f632a3a5906 (diff)
downloadlinux-cd82a32e9924d3a82bd27f830755d23e4ded25bc.tar.xz
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>
Diffstat (limited to 'tools/perf/util/pmu.l')
-rw-r--r--tools/perf/util/pmu.l43
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/perf/util/pmu.l b/tools/perf/util/pmu.l
new file mode 100644
index 000000000000..a15d9fbd7c0e
--- /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;
+}