root/arch/ia64/include/asm/perfmon.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2001-2003 Hewlett-Packard Co
   4  *               Stephane Eranian <eranian@hpl.hp.com>
   5  */
   6 #ifndef _ASM_IA64_PERFMON_H
   7 #define _ASM_IA64_PERFMON_H
   8 
   9 #include <uapi/asm/perfmon.h>
  10 
  11 
  12 extern long perfmonctl(int fd, int cmd, void *arg, int narg);
  13 
  14 typedef struct {
  15         void (*handler)(int irq, void *arg, struct pt_regs *regs);
  16 } pfm_intr_handler_desc_t;
  17 
  18 extern void pfm_save_regs (struct task_struct *);
  19 extern void pfm_load_regs (struct task_struct *);
  20 
  21 extern void pfm_exit_thread(struct task_struct *);
  22 extern int  pfm_use_debug_registers(struct task_struct *);
  23 extern int  pfm_release_debug_registers(struct task_struct *);
  24 extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
  25 extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
  26 extern void pfm_init_percpu(void);
  27 extern void pfm_handle_work(void);
  28 extern int  pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
  29 extern int  pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
  30 
  31 
  32 
  33 /*
  34  * Reset PMD register flags
  35  */
  36 #define PFM_PMD_SHORT_RESET     0
  37 #define PFM_PMD_LONG_RESET      1
  38 
  39 typedef union {
  40         unsigned int val;
  41         struct {
  42                 unsigned int notify_user:1;     /* notify user program of overflow */
  43                 unsigned int reset_ovfl_pmds:1; /* reset overflowed PMDs */
  44                 unsigned int block_task:1;      /* block monitored task on kernel exit */
  45                 unsigned int mask_monitoring:1; /* mask monitors via PMCx.plm */
  46                 unsigned int reserved:28;       /* for future use */
  47         } bits;
  48 } pfm_ovfl_ctrl_t;
  49 
  50 typedef struct {
  51         unsigned char   ovfl_pmd;                       /* index of overflowed PMD  */
  52         unsigned char   ovfl_notify;                    /* =1 if monitor requested overflow notification */
  53         unsigned short  active_set;                     /* event set active at the time of the overflow */
  54         pfm_ovfl_ctrl_t ovfl_ctrl;                      /* return: perfmon controls to set by handler */
  55 
  56         unsigned long   pmd_last_reset;                 /* last reset value of of the PMD */
  57         unsigned long   smpl_pmds[4];                   /* bitmask of other PMD of interest on overflow */
  58         unsigned long   smpl_pmds_values[PMU_MAX_PMDS]; /* values for the other PMDs of interest */
  59         unsigned long   pmd_value;                      /* current 64-bit value of the PMD */
  60         unsigned long   pmd_eventid;                    /* eventid associated with PMD */
  61 } pfm_ovfl_arg_t;
  62 
  63 
  64 typedef struct {
  65         char            *fmt_name;
  66         pfm_uuid_t      fmt_uuid;
  67         size_t          fmt_arg_size;
  68         unsigned long   fmt_flags;
  69 
  70         int             (*fmt_validate)(struct task_struct *task, unsigned int flags, int cpu, void *arg);
  71         int             (*fmt_getsize)(struct task_struct *task, unsigned int flags, int cpu, void *arg, unsigned long *size);
  72         int             (*fmt_init)(struct task_struct *task, void *buf, unsigned int flags, int cpu, void *arg);
  73         int             (*fmt_handler)(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct pt_regs *regs, unsigned long stamp);
  74         int             (*fmt_restart)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
  75         int             (*fmt_restart_active)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
  76         int             (*fmt_exit)(struct task_struct *task, void *buf, struct pt_regs *regs);
  77 
  78         struct list_head fmt_list;
  79 } pfm_buffer_fmt_t;
  80 
  81 extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
  82 extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);
  83 
  84 /*
  85  * perfmon interface exported to modules
  86  */
  87 extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  88 extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  89 extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
  90 extern int pfm_mod_write_dbrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
  91 
  92 /*
  93  * describe the content of the local_cpu_date->pfm_syst_info field
  94  */
  95 #define PFM_CPUINFO_SYST_WIDE   0x1     /* if set a system wide session exists */
  96 #define PFM_CPUINFO_DCR_PP      0x2     /* if set the system wide session has started */
  97 #define PFM_CPUINFO_EXCL_IDLE   0x4     /* the system wide session excludes the idle task */
  98 
  99 /*
 100  * sysctl control structure. visible to sampling formats
 101  */
 102 typedef struct {
 103         int     debug;          /* turn on/off debugging via syslog */
 104         int     debug_ovfl;     /* turn on/off debug printk in overflow handler */
 105         int     fastctxsw;      /* turn on/off fast (unsecure) ctxsw */
 106         int     expert_mode;    /* turn on/off value checking */
 107 } pfm_sysctl_t;
 108 extern pfm_sysctl_t pfm_sysctl;
 109 
 110 
 111 #endif /* _ASM_IA64_PERFMON_H */