v4.19.13 snapshot.
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
new file mode 100644
index 0000000..6d7fe44
--- /dev/null
+++ b/tools/perf/util/header.h
@@ -0,0 +1,180 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_HEADER_H
+#define __PERF_HEADER_H
+
+#include <linux/stddef.h>
+#include <linux/perf_event.h>
+#include <sys/types.h>
+#include <stdbool.h>
+#include <linux/bitmap.h>
+#include <linux/types.h>
+#include "event.h"
+#include "env.h"
+#include "pmu.h"
+
+enum {
+ HEADER_RESERVED = 0, /* always cleared */
+ HEADER_FIRST_FEATURE = 1,
+ HEADER_TRACING_DATA = 1,
+ HEADER_BUILD_ID,
+
+ HEADER_HOSTNAME,
+ HEADER_OSRELEASE,
+ HEADER_VERSION,
+ HEADER_ARCH,
+ HEADER_NRCPUS,
+ HEADER_CPUDESC,
+ HEADER_CPUID,
+ HEADER_TOTAL_MEM,
+ HEADER_CMDLINE,
+ HEADER_EVENT_DESC,
+ HEADER_CPU_TOPOLOGY,
+ HEADER_NUMA_TOPOLOGY,
+ HEADER_BRANCH_STACK,
+ HEADER_PMU_MAPPINGS,
+ HEADER_GROUP_DESC,
+ HEADER_AUXTRACE,
+ HEADER_STAT,
+ HEADER_CACHE,
+ HEADER_SAMPLE_TIME,
+ HEADER_MEM_TOPOLOGY,
+ HEADER_LAST_FEATURE,
+ HEADER_FEAT_BITS = 256,
+};
+
+enum perf_header_version {
+ PERF_HEADER_VERSION_1,
+ PERF_HEADER_VERSION_2,
+};
+
+struct perf_file_section {
+ u64 offset;
+ u64 size;
+};
+
+struct perf_file_header {
+ u64 magic;
+ u64 size;
+ u64 attr_size;
+ struct perf_file_section attrs;
+ struct perf_file_section data;
+ /* event_types is ignored */
+ struct perf_file_section event_types;
+ DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+};
+
+struct perf_pipe_file_header {
+ u64 magic;
+ u64 size;
+};
+
+struct perf_header;
+
+int perf_file_header__read(struct perf_file_header *header,
+ struct perf_header *ph, int fd);
+
+struct perf_header {
+ enum perf_header_version version;
+ bool needs_swap;
+ u64 data_offset;
+ u64 data_size;
+ u64 feat_offset;
+ DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+ struct perf_env env;
+};
+
+struct perf_evlist;
+struct perf_session;
+
+int perf_session__read_header(struct perf_session *session);
+int perf_session__write_header(struct perf_session *session,
+ struct perf_evlist *evlist,
+ int fd, bool at_exit);
+int perf_header__write_pipe(int fd);
+
+void perf_header__set_feat(struct perf_header *header, int feat);
+void perf_header__clear_feat(struct perf_header *header, int feat);
+bool perf_header__has_feat(const struct perf_header *header, int feat);
+
+int perf_header__set_cmdline(int argc, const char **argv);
+
+int perf_header__process_sections(struct perf_header *header, int fd,
+ void *data,
+ int (*process)(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data));
+
+int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
+
+int perf_event__synthesize_features(struct perf_tool *tool,
+ struct perf_session *session,
+ struct perf_evlist *evlist,
+ perf_event__handler_t process);
+
+int perf_event__synthesize_extra_attr(struct perf_tool *tool,
+ struct perf_evlist *evsel_list,
+ perf_event__handler_t process,
+ bool is_pipe);
+
+int perf_event__process_feature(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session);
+
+int perf_event__synthesize_attr(struct perf_tool *tool,
+ struct perf_event_attr *attr, u32 ids, u64 *id,
+ perf_event__handler_t process);
+int perf_event__synthesize_attrs(struct perf_tool *tool,
+ struct perf_session *session,
+ perf_event__handler_t process);
+int perf_event__synthesize_event_update_unit(struct perf_tool *tool,
+ struct perf_evsel *evsel,
+ perf_event__handler_t process);
+int perf_event__synthesize_event_update_scale(struct perf_tool *tool,
+ struct perf_evsel *evsel,
+ perf_event__handler_t process);
+int perf_event__synthesize_event_update_name(struct perf_tool *tool,
+ struct perf_evsel *evsel,
+ perf_event__handler_t process);
+int perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
+ struct perf_evsel *evsel,
+ perf_event__handler_t process);
+int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
+ struct perf_evlist **pevlist);
+int perf_event__process_event_update(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_evlist **pevlist);
+size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
+
+int perf_event__synthesize_tracing_data(struct perf_tool *tool,
+ int fd, struct perf_evlist *evlist,
+ perf_event__handler_t process);
+int perf_event__process_tracing_data(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session);
+
+int perf_event__synthesize_build_id(struct perf_tool *tool,
+ struct dso *pos, u16 misc,
+ perf_event__handler_t process,
+ struct machine *machine);
+int perf_event__process_build_id(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session);
+bool is_perf_magic(u64 magic);
+
+#define NAME_ALIGN 64
+
+struct feat_fd;
+
+int do_write(struct feat_fd *fd, const void *buf, size_t size);
+
+int write_padded(struct feat_fd *fd, const void *bf,
+ size_t count, size_t count_aligned);
+
+/*
+ * arch specific callback
+ */
+int get_cpuid(char *buffer, size_t sz);
+
+char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
+int strcmp_cpuid_str(const char *s1, const char *s2);
+#endif /* __PERF_HEADER_H */