perf evsel: Add support for address filters

This patch makes it possible to use the current filter framework with
address filters.  That way address filters for HW tracers such as
CoreSight and Intel PT can be communicated to the kernel drivers.
Signed-off-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1474037045-31730-4-git-send-email-mathieu.poirier@linaro.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/evsel.c

@@ -1067,6 +1067,11 @@ int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter)
 	return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
 }
 
+int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter)
+{
+	return perf_evsel__append_filter(evsel, "%s,%s", filter);
+}
+
 int perf_evsel__enable(struct perf_evsel *evsel)
 {
 	int nthreads = thread_map__nr(evsel->threads);

tools/perf/util/evsel.h

@@ -236,6 +236,8 @@ void perf_evsel__set_sample_id(struct perf_evsel *evsel,
 
 int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter);
 int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter);
+int perf_evsel__append_addr_filter(struct perf_evsel *evsel,
+				   const char *filter);
 int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
 			     const char *filter);
 int perf_evsel__enable(struct perf_evsel *evsel);

tools/perf/util/parse-events.c

@@ -1760,20 +1760,49 @@ foreach_evsel_in_last_glob(struct perf_evlist *evlist,
 static int set_filter(struct perf_evsel *evsel, const void *arg)
 {
 	const char *str = arg;
+	bool found = false;
+	int nr_addr_filters = 0;
+	struct perf_pmu *pmu = NULL;
 
-	if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
-		fprintf(stderr,
-			"--filter option should follow a -e tracepoint option\n");
-		return -1;
+	if (evsel == NULL)
+		goto err;
+
+	if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
+		if (perf_evsel__append_tp_filter(evsel, str) < 0) {
+			fprintf(stderr,
+				"not enough memory to hold filter string\n");
+			return -1;
+		}
+
+		return 0;
 	}
 
-	if (perf_evsel__append_tp_filter(evsel, str) < 0) {
+	while ((pmu = perf_pmu__scan(pmu)) != NULL)
+		if (pmu->type == evsel->attr.type) {
+			found = true;
+			break;
+		}
+
+	if (found)
+		perf_pmu__scan_file(pmu, "nr_addr_filters",
+				    "%d", &nr_addr_filters);
+
+	if (!nr_addr_filters)
+		goto err;
+
+	if (perf_evsel__append_addr_filter(evsel, str) < 0) {
 		fprintf(stderr,
 			"not enough memory to hold filter string\n");
 		return -1;
 	}
 
 	return 0;
+
+err:
+	fprintf(stderr,
+		"--filter option should follow a -e tracepoint or HW tracer option\n");
+
+	return -1;
 }
 
 int parse_filter(const struct option *opt, const char *str,