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 */