1 files changed, 74 insertions, 0 deletions
diff --git a/tools/perf/util/topdown.c b/tools/perf/util/topdown.c
new file mode 100644
index 000000000..109084155
--- /dev/null
+++ b/tools/perf/util/topdown.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include "pmu.h"
+#include "pmu-hybrid.h"
+#include "topdown.h"
+
+int topdown_filter_events(const char **attr, char **str, bool use_group,
+			  const char *pmu_name)
+{
+	int off = 0;
+	int i;
+	int len = 0;
+	char *s;
+	bool is_hybrid = perf_pmu__is_hybrid(pmu_name);
+
+	for (i = 0; attr[i]; i++) {
+		if (pmu_have_event(pmu_name, attr[i])) {
+			if (is_hybrid)
+				len += strlen(attr[i]) + strlen(pmu_name) + 3;
+			else
+				len += strlen(attr[i]) + 1;
+			attr[i - off] = attr[i];
+		} else
+			off++;
+	}
+	attr[i - off] = NULL;
+
+	*str = malloc(len + 1 + 2);
+	if (!*str)
+		return -1;
+	s = *str;
+	if (i - off == 0) {
+		*s = 0;
+		return 0;
+	}
+	if (use_group)
+		*s++ = '{';
+	for (i = 0; attr[i]; i++) {
+		if (!is_hybrid)
+			strcpy(s, attr[i]);
+		else
+			sprintf(s, "%s/%s/", pmu_name, attr[i]);
+		s += strlen(s);
+		*s++ = ',';
+	}
+	if (use_group) {
+		s[-1] = '}';
+		*s = 0;
+	} else
+		s[-1] = 0;
+	return 0;
+}
+
+__weak bool arch_topdown_check_group(bool *warn)
+{
+	*warn = false;
+	return false;
+}
+
+__weak void arch_topdown_group_warn(void)
+{
+}
+
+__weak bool arch_topdown_sample_read(struct evsel *leader __maybe_unused)
+{
+	return false;
+}
+
+__weak const char *arch_get_topdown_pmu_name(struct evlist *evlist
+					     __maybe_unused,
+					     bool warn __maybe_unused)
+{
+	return "cpu";
+}