linux-kernel - [PATCH V8 14/25] perf tools: Add perf_pmu__format

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Message-Id: <1437150840-31811-15-git-send-email-adrian.hunter@intel.com>
Date:	Fri, 17 Jul 2015 19:33:49 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH V8 14/25] perf tools: Add perf_pmu__format_bits()

Add perf_pmu__format_bits() to get the format bits
for a PMU config term.  Intel PT will use this to
validate terms and to record format bits to enable
later interpreting the config from the attribute
stored in the perf.data file.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/pmu.c | 17 ++++++++++++++++-
 tools/perf/util/pmu.h |  1 +
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 52d569cda606..d26ff0ab8410 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -538,7 +538,7 @@ struct perf_pmu *perf_pmu__find(const char *name)
 }
 
 static struct perf_pmu_format *
-pmu_find_format(struct list_head *formats, char *name)
+pmu_find_format(struct list_head *formats, const char *name)
 {
 	struct perf_pmu_format *format;
 
@@ -549,6 +549,21 @@ pmu_find_format(struct list_head *formats, char *name)
 	return NULL;
 }
 
+__u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
+{
+	struct perf_pmu_format *format = pmu_find_format(formats, name);
+	__u64 bits = 0;
+	int fbit;
+
+	if (!format)
+		return 0;
+
+	for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
+		bits |= 1ULL << fbit;
+
+	return bits;
+}
+
 /*
  * Sets value based on the format definition (format parameter)
  * and unformated value (value parameter).
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 7b9c8cf8ae3e..5d7e84466bee 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -54,6 +54,7 @@ int perf_pmu__config_terms(struct list_head *formats,
 			   struct perf_event_attr *attr,
 			   struct list_head *head_terms,
 			   bool zero, struct parse_events_error *error);
+__u64 perf_pmu__format_bits(struct list_head *formats, const char *name);
 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
 			  struct perf_pmu_info *info);
 struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
-- 
1.9.1

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