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perfmon.h
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1 /*
2  * Copyright (C) 2001-2003 Hewlett-Packard Co
3  * Stephane Eranian <[email protected]>
4  */
5 #ifndef _ASM_IA64_PERFMON_H
6 #define _ASM_IA64_PERFMON_H
7 
8 #include <uapi/asm/perfmon.h>
9 
10 
11 extern long perfmonctl(int fd, int cmd, void *arg, int narg);
12 
13 typedef struct {
14  void (*handler)(int irq, void *arg, struct pt_regs *regs);
15 } pfm_intr_handler_desc_t;
16 
17 extern void pfm_save_regs (struct task_struct *);
18 extern void pfm_load_regs (struct task_struct *);
19 
20 extern void pfm_exit_thread(struct task_struct *);
21 extern int pfm_use_debug_registers(struct task_struct *);
22 extern int pfm_release_debug_registers(struct task_struct *);
23 extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
24 extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
25 extern void pfm_init_percpu(void);
26 extern void pfm_handle_work(void);
27 extern int pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
28 extern int pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
29 
30 
31 
32 /*
33  * Reset PMD register flags
34  */
35 #define PFM_PMD_SHORT_RESET 0
36 #define PFM_PMD_LONG_RESET 1
37 
38 typedef union {
39  unsigned int val;
40  struct {
41  unsigned int notify_user:1; /* notify user program of overflow */
42  unsigned int reset_ovfl_pmds:1; /* reset overflowed PMDs */
43  unsigned int block_task:1; /* block monitored task on kernel exit */
44  unsigned int mask_monitoring:1; /* mask monitors via PMCx.plm */
45  unsigned int reserved:28; /* for future use */
46  } bits;
47 } pfm_ovfl_ctrl_t;
48 
49 typedef struct {
50  unsigned char ovfl_pmd; /* index of overflowed PMD */
51  unsigned char ovfl_notify; /* =1 if monitor requested overflow notification */
52  unsigned short active_set; /* event set active at the time of the overflow */
53  pfm_ovfl_ctrl_t ovfl_ctrl; /* return: perfmon controls to set by handler */
54 
55  unsigned long pmd_last_reset; /* last reset value of of the PMD */
56  unsigned long smpl_pmds[4]; /* bitmask of other PMD of interest on overflow */
57  unsigned long smpl_pmds_values[PMU_MAX_PMDS]; /* values for the other PMDs of interest */
58  unsigned long pmd_value; /* current 64-bit value of the PMD */
59  unsigned long pmd_eventid; /* eventid associated with PMD */
60 } pfm_ovfl_arg_t;
61 
62 
63 typedef struct {
64  char *fmt_name;
65  pfm_uuid_t fmt_uuid;
66  size_t fmt_arg_size;
67  unsigned long fmt_flags;
68 
69  int (*fmt_validate)(struct task_struct *task, unsigned int flags, int cpu, void *arg);
70  int (*fmt_getsize)(struct task_struct *task, unsigned int flags, int cpu, void *arg, unsigned long *size);
71  int (*fmt_init)(struct task_struct *task, void *buf, unsigned int flags, int cpu, void *arg);
72  int (*fmt_handler)(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct pt_regs *regs, unsigned long stamp);
73  int (*fmt_restart)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
74  int (*fmt_restart_active)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
75  int (*fmt_exit)(struct task_struct *task, void *buf, struct pt_regs *regs);
76 
77  struct list_head fmt_list;
78 } pfm_buffer_fmt_t;
79 
80 extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
81 extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);
82 
83 /*
84  * perfmon interface exported to modules
85  */
86 extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
87 extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
88 extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
89 extern int pfm_mod_write_dbrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
90 
91 /*
92  * describe the content of the local_cpu_date->pfm_syst_info field
93  */
94 #define PFM_CPUINFO_SYST_WIDE 0x1 /* if set a system wide session exists */
95 #define PFM_CPUINFO_DCR_PP 0x2 /* if set the system wide session has started */
96 #define PFM_CPUINFO_EXCL_IDLE 0x4 /* the system wide session excludes the idle task */
97 
98 /*
99  * sysctl control structure. visible to sampling formats
100  */
101 typedef struct {
102  int debug; /* turn on/off debugging via syslog */
103  int debug_ovfl; /* turn on/off debug printk in overflow handler */
104  int fastctxsw; /* turn on/off fast (unsecure) ctxsw */
105  int expert_mode; /* turn on/off value checking */
106 } pfm_sysctl_t;
107 extern pfm_sysctl_t pfm_sysctl;
108 
109 
110 #endif /* _ASM_IA64_PERFMON_H */
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