blob: c462bc50c6ab55df83a59c308e64ac845432e39f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/*
* Copyright (C) 2001-2002 Hewlett-Packard Co
* Stephane Eranian <eranian@hpl.hp.com>
*/
#ifndef _ASM_IA64_PERFMON_H
#define _ASM_IA64_PERFMON_H
/*
* perfmon comamnds supported on all CPU models
*/
#define PFM_WRITE_PMCS 0x01
#define PFM_WRITE_PMDS 0x02
#define PFM_READ_PMDS 0x03
#define PFM_STOP 0x04
#define PFM_START 0x05
#define PFM_ENABLE 0x06
#define PFM_DISABLE 0x07
#define PFM_CREATE_CONTEXT 0x08
#define PFM_DESTROY_CONTEXT 0x09
#define PFM_RESTART 0x0a
#define PFM_PROTECT_CONTEXT 0x0b
#define PFM_GET_FEATURES 0x0c
#define PFM_DEBUG 0x0d
#define PFM_UNPROTECT_CONTEXT 0x0e
#define PFM_GET_PMC_RESET_VAL 0x0f
/*
* CPU model specific commands (may not be supported on all models)
*/
#define PFM_WRITE_IBRS 0x20
#define PFM_WRITE_DBRS 0x21
/*
* context flags
*/
#define PFM_FL_INHERIT_NONE 0x00 /* never inherit a context across fork (default) */
#define PFM_FL_INHERIT_ONCE 0x01 /* clone pfm_context only once across fork() */
#define PFM_FL_INHERIT_ALL 0x02 /* always clone pfm_context across fork() */
#define PFM_FL_NOTIFY_BLOCK 0x04 /* block task on user level notifications */
#define PFM_FL_SYSTEM_WIDE 0x08 /* create a system wide context */
/*
* PMC flags
*/
#define PFM_REGFL_OVFL_NOTIFY 0x1 /* send notification on overflow */
/*
* PMD/PMC/IBR/DBR return flags (ignored on input)
*
* Those flags are used on output and must be checked in case EAGAIN is returned
* by any of the calls using a pfarg_reg_t or pfarg_dbreg_t structure.
*/
#define PFM_REG_RETFL_NOTAVAIL (1U<<31) /* set if register is implemented but not available */
#define PFM_REG_RETFL_EINVAL (1U<<30) /* set if register entry is invalid */
#define PFM_REG_RETFL_MASK (PFM_REG_RETFL_NOTAVAIL|PFM_REG_RETFL_EINVAL)
#define PFM_REG_HAS_ERROR(flag) (((flag) & PFM_REG_RETFL_MASK) != 0)
/*
* Request structure used to define a context
*/
typedef struct {
unsigned long ctx_smpl_entries; /* how many entries in sampling buffer */
unsigned long ctx_smpl_regs[4]; /* which pmds to record on overflow */
pid_t ctx_notify_pid; /* which process to notify on overflow */
int ctx_flags; /* noblock/block, inherit flags */
void *ctx_smpl_vaddr; /* returns address of BTB buffer */
unsigned long ctx_cpu_mask; /* on which CPU to enable perfmon (systemwide) */
unsigned long reserved[8]; /* for future use */
} pfarg_context_t;
/*
* Request structure used to write/read a PMC or PMD
*/
typedef struct {
unsigned int reg_num; /* which register */
unsigned int reg_flags; /* PMC: notify/don't notify. PMD/PMC: return flags */
unsigned long reg_value; /* configuration (PMC) or initial value (PMD) */
unsigned long reg_long_reset; /* reset after sampling buffer overflow (large) */
unsigned long reg_short_reset;/* reset after counter overflow (small) */
unsigned long reg_reset_pmds[4]; /* which other counters to reset on overflow */
unsigned long reserved[16]; /* for future use */
} pfarg_reg_t;
typedef struct {
unsigned int dbreg_num; /* which register */
unsigned int dbreg_flags; /* dbregs return flags */
unsigned long dbreg_value; /* configuration (PMC) or initial value (PMD) */
unsigned long reserved[6];
} pfarg_dbreg_t;
typedef struct {
unsigned int ft_version; /* perfmon: major [16-31], minor [0-15] */
unsigned int ft_smpl_version;/* sampling format: major [16-31], minor [0-15] */
unsigned long reserved[4]; /* for future use */
} pfarg_features_t;
/*
* This header is at the beginning of the sampling buffer returned to the user.
* It is exported as Read-Only at this point. It is directly followed by the
* first record.
*/
typedef struct {
unsigned int hdr_version; /* contains perfmon version (smpl format diffs) */
unsigned int reserved;
unsigned long hdr_entry_size; /* size of one entry in bytes */
unsigned long hdr_count; /* how many valid entries */
unsigned long hdr_pmds[4]; /* which pmds are recorded */
} perfmon_smpl_hdr_t;
/*
* Define the version numbers for both perfmon as a whole and the sampling buffer format.
*/
#define PFM_VERSION_MAJ 1U
#define PFM_VERSION_MIN 0U
#define PFM_VERSION (((PFM_VERSION_MAJ&0xffff)<<16)|(PFM_VERSION_MIN & 0xffff))
#define PFM_SMPL_VERSION_MAJ 1U
#define PFM_SMPL_VERSION_MIN 0U
#define PFM_SMPL_VERSION (((PFM_SMPL_VERSION_MAJ&0xffff)<<16)|(PFM_SMPL_VERSION_MIN & 0xffff))
#define PFM_VERSION_MAJOR(x) (((x)>>16) & 0xffff)
#define PFM_VERSION_MINOR(x) ((x) & 0xffff)
typedef struct {
int pid; /* identification of process */
int cpu; /* which cpu was used */
unsigned long rate; /* initial value of overflowed counter */
unsigned long stamp; /* timestamp */
unsigned long ip; /* where did the overflow interrupt happened */
unsigned long regs; /* bitmask of which registers overflowed */
unsigned long period; /* sampling period used by overflowed counter (smallest pmd index) */
} perfmon_smpl_entry_t;
extern int perfmonctl(pid_t pid, int cmd, void *arg, int narg);
#ifdef __KERNEL__
extern void pfm_save_regs (struct task_struct *);
extern void pfm_load_regs (struct task_struct *);
extern int pfm_inherit (struct task_struct *, struct pt_regs *);
extern void pfm_context_exit (struct task_struct *);
extern void pfm_flush_regs (struct task_struct *);
extern void pfm_cleanup_notifiers (struct task_struct *);
extern void pfm_cleanup_owners (struct task_struct *);
extern int pfm_use_debug_registers(struct task_struct *);
extern int pfm_release_debug_registers(struct task_struct *);
extern int pfm_cleanup_smpl_buf(struct task_struct *);
extern void pfm_syst_wide_update_task(struct task_struct *, int);
extern void perfmon_init_percpu(void);
#endif /* __KERNEL__ */
#endif /* _ASM_IA64_PERFMON_H */
|
