1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * Copyright (C) 2002-2003 Hewlett-Packard Co
4 * Stephane Eranian <eranian@hpl.hp.com>
5 *
6 * This file implements the default sampling buffer format
7 * for Linux/ia64 perfmon subsystem.
8 */
9 #ifndef __PERFMON_DEFAULT_SMPL_H__
10 #define __PERFMON_DEFAULT_SMPL_H__ 1
11
12 #define PFM_DEFAULT_SMPL_UUID { \
13 0x4d, 0x72, 0xbe, 0xc0, 0x06, 0x64, 0x41, 0x43, 0x82, 0xb4, 0xd3, 0xfd, 0x27, 0x24, 0x3c, 0x97}
14
15 /*
16 * format specific parameters (passed at context creation)
17 */
18 typedef struct {
19 unsigned long buf_size; /* size of the buffer in bytes */
20 unsigned int flags; /* buffer specific flags */
21 unsigned int res1; /* for future use */
22 unsigned long reserved[2]; /* for future use */
23 } pfm_default_smpl_arg_t;
24
25 /*
26 * combined context+format specific structure. Can be passed
27 * to PFM_CONTEXT_CREATE
28 */
29 typedef struct {
30 pfarg_context_t ctx_arg;
31 pfm_default_smpl_arg_t buf_arg;
32 } pfm_default_smpl_ctx_arg_t;
33
34 /*
35 * This header is at the beginning of the sampling buffer returned to the user.
36 * It is directly followed by the first record.
37 */
38 typedef struct {
39 unsigned long hdr_count; /* how many valid entries */
40 unsigned long hdr_cur_offs; /* current offset from top of buffer */
41 unsigned long hdr_reserved2; /* reserved for future use */
42
43 unsigned long hdr_overflows; /* how many times the buffer overflowed */
44 unsigned long hdr_buf_size; /* how many bytes in the buffer */
45
46 unsigned int hdr_version; /* contains perfmon version (smpl format diffs) */
47 unsigned int hdr_reserved1; /* for future use */
48 unsigned long hdr_reserved[10]; /* for future use */
49 } pfm_default_smpl_hdr_t;
50
51 /*
52 * Entry header in the sampling buffer. The header is directly followed
53 * with the values of the PMD registers of interest saved in increasing
54 * index order: PMD4, PMD5, and so on. How many PMDs are present depends
55 * on how the session was programmed.
56 *
57 * In the case where multiple counters overflow at the same time, multiple
58 * entries are written consecutively.
59 *
60 * last_reset_value member indicates the initial value of the overflowed PMD.
61 */
62 typedef struct {
63 int pid; /* thread id (for NPTL, this is gettid()) */
64 unsigned char reserved1[3]; /* reserved for future use */
65 unsigned char ovfl_pmd; /* index of overflowed PMD */
66
67 unsigned long last_reset_val; /* initial value of overflowed PMD */
68 unsigned long ip; /* where did the overflow interrupt happened */
69 unsigned long tstamp; /* ar.itc when entering perfmon intr. handler */
70
71 unsigned short cpu; /* cpu on which the overflow occurred */
72 unsigned short set; /* event set active when overflow occurred */
73 int tgid; /* thread group id (for NPTL, this is getpid()) */
74 } pfm_default_smpl_entry_t;
75
76 #define PFM_DEFAULT_MAX_PMDS 64 /* how many pmds supported by data structures (sizeof(unsigned long) */
77 #define PFM_DEFAULT_MAX_ENTRY_SIZE (sizeof(pfm_default_smpl_entry_t)+(sizeof(unsigned long)*PFM_DEFAULT_MAX_PMDS))
78 #define PFM_DEFAULT_SMPL_MIN_BUF_SIZE (sizeof(pfm_default_smpl_hdr_t)+PFM_DEFAULT_MAX_ENTRY_SIZE)
79
80 #define PFM_DEFAULT_SMPL_VERSION_MAJ 2U
81 #define PFM_DEFAULT_SMPL_VERSION_MIN 0U
82 #define PFM_DEFAULT_SMPL_VERSION (((PFM_DEFAULT_SMPL_VERSION_MAJ&0xffff)<<16)|(PFM_DEFAULT_SMPL_VERSION_MIN & 0xffff))
83
84 #endif /* __PERFMON_DEFAULT_SMPL_H__ */