1. 根目录:
2. arch
3. powerpc
4. perf
5. hv-24x7-catalog.h

#ifndef LINUX_POWERPC_PERF_HV_24X7_CATALOG_H_
#define LINUX_POWERPC_PERF_HV_24X7_CATALOG_H_

#include <linux/types.h>

/* From document "24x7 Event and Group Catalog Formats Proposal" v0.15 */

struct hv_24x7_catalog_page_0 {
#define HV_24X7_CATALOG_MAGIC 0x32347837 /* "24x7" in ASCII */
	__be32 magic;
	__be32 length; /* In 4096 byte pages */
	__be64 version; /* XXX: arbitrary? what's the meaning/useage/purpose? */
	__u8 build_time_stamp[16]; /* "YYYYMMDDHHMMSS\0\0" */
	__u8 reserved2[32];
	__be16 schema_data_offs; /* in 4096 byte pages */
	__be16 schema_data_len;  /* in 4096 byte pages */
	__be16 schema_entry_count;
	__u8 reserved3[2];
	__be16 event_data_offs;
	__be16 event_data_len;
	__be16 event_entry_count;
	__u8 reserved4[2];
	__be16 group_data_offs; /* in 4096 byte pages */
	__be16 group_data_len;  /* in 4096 byte pages */
	__be16 group_entry_count;
	__u8 reserved5[2];
	__be16 formula_data_offs; /* in 4096 byte pages */
	__be16 formula_data_len;  /* in 4096 byte pages */
	__be16 formula_entry_count;
	__u8 reserved6[2];
} __packed;

struct hv_24x7_event_data {
	__be16 length; /* in bytes, must be a multiple of 16 */
	__u8 reserved1[2];
	__u8 domain; /* Chip = 1, Core = 2 */
	__u8 reserved2[1];
	__be16 event_group_record_offs; /* in bytes, must be 8 byte aligned */
	__be16 event_group_record_len; /* in bytes */

	/* in bytes, offset from event_group_record */
	__be16 event_counter_offs;

	/* verified_state, unverified_state, caveat_state, broken_state, ... */
	__be32 flags;

	__be16 primary_group_ix;
	__be16 group_count;
	__be16 event_name_len;
	__u8 remainder[];
	/* __u8 event_name[event_name_len - 2]; */
	/* __be16 event_description_len; */
	/* __u8 event_desc[event_description_len - 2]; */
	/* __be16 detailed_desc_len; */
	/* __u8 detailed_desc[detailed_desc_len - 2]; */
} __packed;

#endif