summaryrefslogtreecommitdiffstats
path: root/arch/ia64/include/uapi/asm/perfmon.h
blob: 017548365e5c3f56ef83b85bc10a4f0898243437 (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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright (C) 2001-2003 Hewlett-Packard Co
 *               Stephane Eranian <eranian@hpl.hp.com>
 */

#ifndef _UAPI_ASM_IA64_PERFMON_H
#define _UAPI_ASM_IA64_PERFMON_H

/*
 * perfmon commands 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 /* obsolete */
#define PFM_DISABLE		0x07 /* obsolete */
#define PFM_CREATE_CONTEXT	0x08
#define PFM_DESTROY_CONTEXT	0x09 /* obsolete use close() */
#define PFM_RESTART		0x0a
#define PFM_PROTECT_CONTEXT	0x0b /* obsolete */
#define PFM_GET_FEATURES	0x0c
#define PFM_DEBUG		0x0d
#define PFM_UNPROTECT_CONTEXT	0x0e /* obsolete */
#define PFM_GET_PMC_RESET_VAL	0x0f
#define PFM_LOAD_CONTEXT	0x10
#define PFM_UNLOAD_CONTEXT	0x11

/*
 * PMU model specific commands (may not be supported on all PMU models)
 */
#define PFM_WRITE_IBRS		0x20
#define PFM_WRITE_DBRS		0x21

/*
 * context flags
 */
#define PFM_FL_NOTIFY_BLOCK    	 0x01	/* block task on user level notifications */
#define PFM_FL_SYSTEM_WIDE	 0x02	/* create a system wide context */
#define PFM_FL_OVFL_NO_MSG	 0x80   /* do not post overflow/end messages for notification */

/*
 * event set flags
 */
#define PFM_SETFL_EXCL_IDLE      0x01   /* exclude idle task (syswide only) XXX: DO NOT USE YET */

/*
 * PMC flags
 */
#define PFM_REGFL_OVFL_NOTIFY	0x1	/* send notification on overflow */
#define PFM_REGFL_RANDOM	0x2	/* randomize sampling interval   */

/*
 * 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	(1UL<<31) /* set if register is implemented but not available */
#define PFM_REG_RETFL_EINVAL	(1UL<<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)

typedef unsigned char pfm_uuid_t[16];	/* custom sampling buffer identifier type */

/*
 * Request structure used to define a context
 */
typedef struct {
	pfm_uuid_t     ctx_smpl_buf_id;	 /* which buffer format to use (if needed) */
	unsigned long  ctx_flags;	 /* noblock/block */
	unsigned short ctx_nextra_sets;	 /* number of extra event sets (you always get 1) */
	unsigned short ctx_reserved1;	 /* for future use */
	int	       ctx_fd;		 /* return arg: unique identification for context */
	void	       *ctx_smpl_vaddr;	 /* return arg: virtual address of sampling buffer, is used */
	unsigned long  ctx_reserved2[11];/* 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 short	reg_set;	   /* event set for this register */
	unsigned short	reg_reserved1;	   /* for future use */

	unsigned long	reg_value;	   /* initial pmc/pmd value */
	unsigned long	reg_flags;	   /* input: pmc/pmd flags, return: reg error */

	unsigned long	reg_long_reset;	   /* reset after buffer overflow notification */
	unsigned long	reg_short_reset;   /* reset after counter overflow */

	unsigned long	reg_reset_pmds[4]; /* which other counters to reset on overflow */
	unsigned long	reg_random_seed;   /* seed value when randomization is used */
	unsigned long	reg_random_mask;   /* bitmask used to limit random value */
	unsigned long   reg_last_reset_val;/* return: PMD last reset value */

	unsigned long	reg_smpl_pmds[4];  /* which pmds are accessed when PMC overflows */
	unsigned long	reg_smpl_eventid;  /* opaque sampling event identifier */

	unsigned long   reg_reserved2[3];   /* for future use */
} pfarg_reg_t;

typedef struct {
	unsigned int	dbreg_num;		/* which debug register */
	unsigned short	dbreg_set;		/* event set for this register */
	unsigned short	dbreg_reserved1;	/* for future use */
	unsigned long	dbreg_value;		/* value for debug register */
	unsigned long	dbreg_flags;		/* return: dbreg error */
	unsigned long	dbreg_reserved2[1];	/* for future use */
} pfarg_dbreg_t;

typedef struct {
	unsigned int	ft_version;	/* perfmon: major [16-31], minor [0-15] */
	unsigned int	ft_reserved;	/* reserved for future use */
	unsigned long	reserved[4];	/* for future use */
} pfarg_features_t;

typedef struct {
	pid_t		load_pid;	   /* process to load the context into */
	unsigned short	load_set;	   /* first event set to load */
	unsigned short	load_reserved1;	   /* for future use */
	unsigned long	load_reserved2[3]; /* for future use */
} pfarg_load_t;

typedef struct {
	int		msg_type;		/* generic message header */
	int		msg_ctx_fd;		/* generic message header */
	unsigned long	msg_ovfl_pmds[4];	/* which PMDs overflowed */
	unsigned short  msg_active_set;		/* active set at the time of overflow */
	unsigned short  msg_reserved1;		/* for future use */
	unsigned int    msg_reserved2;		/* for future use */
	unsigned long	msg_tstamp;		/* for perf tuning/debug */
} pfm_ovfl_msg_t;

typedef struct {
	int		msg_type;		/* generic message header */
	int		msg_ctx_fd;		/* generic message header */
	unsigned long	msg_tstamp;		/* for perf tuning */
} pfm_end_msg_t;

typedef struct {
	int		msg_type;		/* type of the message */
	int		msg_ctx_fd;		/* unique identifier for the context */
	unsigned long	msg_tstamp;		/* for perf tuning */
} pfm_gen_msg_t;

#define PFM_MSG_OVFL	1	/* an overflow happened */
#define PFM_MSG_END	2	/* task to which context was attached ended */

typedef union {
	pfm_ovfl_msg_t	pfm_ovfl_msg;
	pfm_end_msg_t	pfm_end_msg;
	pfm_gen_msg_t	pfm_gen_msg;
} pfm_msg_t;

/*
 * Define the version numbers for both perfmon as a whole and the sampling buffer format.
 */
#define PFM_VERSION_MAJ		 2U
#define PFM_VERSION_MIN		 0U
#define PFM_VERSION		 (((PFM_VERSION_MAJ&0xffff)<<16)|(PFM_VERSION_MIN & 0xffff))
#define PFM_VERSION_MAJOR(x)	 (((x)>>16) & 0xffff)
#define PFM_VERSION_MINOR(x)	 ((x) & 0xffff)


/*
 * miscellaneous architected definitions
 */
#define PMU_FIRST_COUNTER	4	/* first counting monitor (PMC/PMD) */
#define PMU_MAX_PMCS		256	/* maximum architected number of PMC registers */
#define PMU_MAX_PMDS		256	/* maximum architected number of PMD registers */


#endif /* _UAPI_ASM_IA64_PERFMON_H */
OpenPOWER on IntegriCloud