LXR linux/arch/ia64/include/asm/perfmon.h

   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
  12extern long perfmonctl(int fd, int cmd, void *arg, int narg);
  13
  14typedef struct {
  15        void (*handler)(int irq, void *arg, struct pt_regs *regs);
  16} pfm_intr_handler_desc_t;
  17
  18extern void pfm_save_regs (struct task_struct *);
  19extern void pfm_load_regs (struct task_struct *);
  20
  21extern void pfm_exit_thread(struct task_struct *);
  22extern int  pfm_use_debug_registers(struct task_struct *);
  23extern int  pfm_release_debug_registers(struct task_struct *);
  24extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
  25extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
  26extern void pfm_init_percpu(void);
  27extern void pfm_handle_work(void);
  28extern int  pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
  29extern 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
  39typedef 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
  50typedef 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
  64typedef 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
  81extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
  82extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);
  83
  84/*
  85 * perfmon interface exported to modules
  86 */
  87extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  88extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  89extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
  90extern 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 */
 102typedef 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;
 108extern pfm_sysctl_t pfm_sysctl;
 109
 110
 111#endif /* _ASM_IA64_PERFMON_H */
 112