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 */ 112