1 files changed, 90 insertions, 0 deletions
diff --git a/tools/perf/util/metricgroup.h b/tools/perf/util/metricgroup.h
new file mode 100644
index 000000000..732d3a0d3
--- /dev/null
+++ b/tools/perf/util/metricgroup.h
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#ifndef METRICGROUP_H
+#define METRICGROUP_H 1
+
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <stdbool.h>
+#include "pmu-events/pmu-events.h"
+
+struct evlist;
+struct evsel;
+struct option;
+struct rblist;
+struct cgroup;
+
+/**
+ * A node in a rblist keyed by the evsel. The global rblist of metric events
+ * generally exists in perf_stat_config. The evsel is looked up in the rblist
+ * yielding a list of metric_expr.
+ */
+struct metric_event {
+	struct rb_node nd;
+	struct evsel *evsel;
+	struct list_head head; /* list of metric_expr */
+};
+
+/**
+ * A metric referenced by a metric_expr. When parsing a metric expression IDs
+ * will be looked up, matching either a value (from metric_events) or a
+ * metric_ref. A metric_ref will then be parsed recursively. The metric_refs and
+ * metric_events need to be known before parsing so that their values may be
+ * placed in the parse context for lookup.
+ */
+struct metric_ref {
+	const char *metric_name;
+	const char *metric_expr;
+};
+
+/**
+ * One in a list of metric_expr associated with an evsel. The data is used to
+ * generate a metric value during stat output.
+ */
+struct metric_expr {
+	struct list_head nd;
+	/** The expression to parse, for example, "instructions/cycles". */
+	const char *metric_expr;
+	/** The name of the meric such as "IPC". */
+	const char *metric_name;
+	/**
+	 * The "ScaleUnit" that scales and adds a unit to the metric during
+	 * output. For example, "6.4e-05MiB" means to scale the resulting metric
+	 * by 6.4e-05 (typically converting a unit like cache lines to something
+	 * more human intelligible) and then add "MiB" afterward when displayed.
+	 */
+	const char *metric_unit;
+	/** Null terminated array of events used by the metric. */
+	struct evsel **metric_events;
+	/** Null terminated array of referenced metrics. */
+	struct metric_ref *metric_refs;
+	/** A value substituted for '?' during parsing. */
+	int runtime;
+};
+
+struct metric_event *metricgroup__lookup(struct rblist *metric_events,
+					 struct evsel *evsel,
+					 bool create);
+int metricgroup__parse_groups(struct evlist *perf_evlist,
+			      const char *str,
+			      bool metric_no_group,
+			      bool metric_no_merge,
+			      const char *user_requested_cpu_list,
+			      bool system_wide,
+			      struct rblist *metric_events);
+int metricgroup__parse_groups_test(struct evlist *evlist,
+				   const struct pmu_events_table *table,
+				   const char *str,
+				   bool metric_no_group,
+				   bool metric_no_merge,
+				   struct rblist *metric_events);
+
+void metricgroup__print(bool metrics, bool groups, char *filter,
+			bool raw, bool details, const char *pmu_name);
+bool metricgroup__has_metric(const char *metric);
+int arch_get_runtimeparam(const struct pmu_event *pe __maybe_unused);
+void metricgroup__rblist_exit(struct rblist *metric_events);
+
+int metricgroup__copy_metric_events(struct evlist *evlist, struct cgroup *cgrp,
+				    struct rblist *new_metric_events,
+				    struct rblist *old_metric_events);
+#endif