v4.19.13 snapshot.
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
new file mode 100644
index 0000000..183c914
--- /dev/null
+++ b/tools/perf/util/tool.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_TOOL_H
+#define __PERF_TOOL_H
+
+#include <stdbool.h>
+
+#include <linux/types.h>
+
+struct perf_session;
+union perf_event;
+struct perf_evlist;
+struct perf_evsel;
+struct perf_sample;
+struct perf_tool;
+struct machine;
+struct ordered_events;
+
+typedef int (*event_sample)(struct perf_tool *tool, union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel, struct machine *machine);
+
+typedef int (*event_op)(struct perf_tool *tool, union perf_event *event,
+ struct perf_sample *sample, struct machine *machine);
+
+typedef int (*event_attr_op)(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_evlist **pevlist);
+
+typedef int (*event_op2)(struct perf_tool *tool, union perf_event *event,
+ struct perf_session *session);
+
+typedef int (*event_oe)(struct perf_tool *tool, union perf_event *event,
+ struct ordered_events *oe);
+
+typedef s64 (*event_op3)(struct perf_tool *tool, union perf_event *event,
+ struct perf_session *session);
+
+enum show_feature_header {
+ SHOW_FEAT_NO_HEADER = 0,
+ SHOW_FEAT_HEADER,
+ SHOW_FEAT_HEADER_FULL_INFO,
+};
+
+struct perf_tool {
+ event_sample sample,
+ read;
+ event_op mmap,
+ mmap2,
+ comm,
+ namespaces,
+ fork,
+ exit,
+ lost,
+ lost_samples,
+ aux,
+ itrace_start,
+ context_switch,
+ throttle,
+ unthrottle;
+ event_attr_op attr;
+ event_attr_op event_update;
+ event_op2 tracing_data;
+ event_oe finished_round;
+ event_op2 build_id,
+ id_index,
+ auxtrace_info,
+ auxtrace_error,
+ time_conv,
+ thread_map,
+ cpu_map,
+ stat_config,
+ stat,
+ stat_round,
+ feature;
+ event_op3 auxtrace;
+ bool ordered_events;
+ bool ordering_requires_timestamps;
+ bool namespace_events;
+ bool no_warn;
+ enum show_feature_header show_feat_hdr;
+};
+
+#endif /* __PERF_TOOL_H */