| /* |
| * Copyright (C) 2001-2003 Hewlett-Packard Co |
| * Stephane Eranian <eranian@hpl.hp.com> |
| */ |
| |
| #ifndef _ASM_IA64_PERFMON_H |
| #define _ASM_IA64_PERFMON_H |
| |
| /* |
| * perfmon comamnds supported on all CPU models |
| */ |
| #define PFM_WRITE_PMCS 0x01 |
| #define PFM_WRITE_PMDS 0x02 |
| #define PFM_READ_PMDS 0x03 |
| #define PFM_STOP 0x04 |
| #define PFM_START 0x05 |
| #define PFM_ENABLE 0x06 /* obsolete */ |
| #define PFM_DISABLE 0x07 /* obsolete */ |
| #define PFM_CREATE_CONTEXT 0x08 |
| #define PFM_DESTROY_CONTEXT 0x09 /* obsolete use close() */ |
| #define PFM_RESTART 0x0a |
| #define PFM_PROTECT_CONTEXT 0x0b /* obsolete */ |
| #define PFM_GET_FEATURES 0x0c |
| #define PFM_DEBUG 0x0d |
| #define PFM_UNPROTECT_CONTEXT 0x0e /* obsolete */ |
| #define PFM_GET_PMC_RESET_VAL 0x0f |
| #define PFM_LOAD_CONTEXT 0x10 |
| #define PFM_UNLOAD_CONTEXT 0x11 |
| |
| /* |
| * PMU model specific commands (may not be supported on all PMU models) |
| */ |
| #define PFM_WRITE_IBRS 0x20 |
| #define PFM_WRITE_DBRS 0x21 |
| |
| /* |
| * context flags |
| */ |
| #define PFM_FL_NOTIFY_BLOCK 0x01 /* block task on user level notifications */ |
| #define PFM_FL_SYSTEM_WIDE 0x02 /* create a system wide context */ |
| #define PFM_FL_OVFL_NO_MSG 0x80 /* do not post overflow/end messages for notification */ |
| |
| /* |
| * event set flags |
| */ |
| #define PFM_SETFL_EXCL_IDLE 0x01 /* exclude idle task (syswide only) XXX: DO NOT USE YET */ |
| |
| /* |
| * PMC flags |
| */ |
| #define PFM_REGFL_OVFL_NOTIFY 0x1 /* send notification on overflow */ |
| #define PFM_REGFL_RANDOM 0x2 /* randomize sampling interval */ |
| |
| /* |
| * PMD/PMC/IBR/DBR return flags (ignored on input) |
| * |
| * Those flags are used on output and must be checked in case EAGAIN is returned |
| * by any of the calls using a pfarg_reg_t or pfarg_dbreg_t structure. |
| */ |
| #define PFM_REG_RETFL_NOTAVAIL (1UL<<31) /* set if register is implemented but not available */ |
| #define PFM_REG_RETFL_EINVAL (1UL<<30) /* set if register entry is invalid */ |
| #define PFM_REG_RETFL_MASK (PFM_REG_RETFL_NOTAVAIL|PFM_REG_RETFL_EINVAL) |
| |
| #define PFM_REG_HAS_ERROR(flag) (((flag) & PFM_REG_RETFL_MASK) != 0) |
| |
| typedef unsigned char pfm_uuid_t[16]; /* custom sampling buffer identifier type */ |
| |
| /* |
| * Request structure used to define a context |
| */ |
| typedef struct { |
| pfm_uuid_t ctx_smpl_buf_id; /* which buffer format to use (if needed) */ |
| unsigned long ctx_flags; /* noblock/block */ |
| unsigned short ctx_nextra_sets; /* number of extra event sets (you always get 1) */ |
| unsigned short ctx_reserved1; /* for future use */ |
| int ctx_fd; /* return arg: unique identification for context */ |
| void *ctx_smpl_vaddr; /* return arg: virtual address of sampling buffer, is used */ |
| unsigned long ctx_reserved2[11];/* for future use */ |
| } pfarg_context_t; |
| |
| /* |
| * Request structure used to write/read a PMC or PMD |
| */ |
| typedef struct { |
| unsigned int reg_num; /* which register */ |
| unsigned short reg_set; /* event set for this register */ |
| unsigned short reg_reserved1; /* for future use */ |
| |
| unsigned long reg_value; /* initial pmc/pmd value */ |
| unsigned long reg_flags; /* input: pmc/pmd flags, return: reg error */ |
| |
| unsigned long reg_long_reset; /* reset after buffer overflow notification */ |
| unsigned long reg_short_reset; /* reset after counter overflow */ |
| |
| unsigned long reg_reset_pmds[4]; /* which other counters to reset on overflow */ |
| unsigned long reg_random_seed; /* seed value when randomization is used */ |
| unsigned long reg_random_mask; /* bitmask used to limit random value */ |
| unsigned long reg_last_reset_val;/* return: PMD last reset value */ |
| |
| unsigned long reg_smpl_pmds[4]; /* which pmds are accessed when PMC overflows */ |
| unsigned long reg_smpl_eventid; /* opaque sampling event identifier */ |
| |
| unsigned long reg_reserved2[3]; /* for future use */ |
| } pfarg_reg_t; |
| |
| typedef struct { |
| unsigned int dbreg_num; /* which debug register */ |
| unsigned short dbreg_set; /* event set for this register */ |
| unsigned short dbreg_reserved1; /* for future use */ |
| unsigned long dbreg_value; /* value for debug register */ |
| unsigned long dbreg_flags; /* return: dbreg error */ |
| unsigned long dbreg_reserved2[1]; /* for future use */ |
| } pfarg_dbreg_t; |
| |
| typedef struct { |
| unsigned int ft_version; /* perfmon: major [16-31], minor [0-15] */ |
| unsigned int ft_reserved; /* reserved for future use */ |
| unsigned long reserved[4]; /* for future use */ |
| } pfarg_features_t; |
| |
| typedef struct { |
| pid_t load_pid; /* process to load the context into */ |
| unsigned short load_set; /* first event set to load */ |
| unsigned short load_reserved1; /* for future use */ |
| unsigned long load_reserved2[3]; /* for future use */ |
| } pfarg_load_t; |
| |
| typedef struct { |
| int msg_type; /* generic message header */ |
| int msg_ctx_fd; /* generic message header */ |
| unsigned long msg_ovfl_pmds[4]; /* which PMDs overflowed */ |
| unsigned short msg_active_set; /* active set at the time of overflow */ |
| unsigned short msg_reserved1; /* for future use */ |
| unsigned int msg_reserved2; /* for future use */ |
| unsigned long msg_tstamp; /* for perf tuning/debug */ |
| } pfm_ovfl_msg_t; |
| |
| typedef struct { |
| int msg_type; /* generic message header */ |
| int msg_ctx_fd; /* generic message header */ |
| unsigned long msg_tstamp; /* for perf tuning */ |
| } pfm_end_msg_t; |
| |
| typedef struct { |
| int msg_type; /* type of the message */ |
| int msg_ctx_fd; /* unique identifier for the context */ |
| unsigned long msg_tstamp; /* for perf tuning */ |
| } pfm_gen_msg_t; |
| |
| #define PFM_MSG_OVFL 1 /* an overflow happened */ |
| #define PFM_MSG_END 2 /* task to which context was attached ended */ |
| |
| typedef union { |
| pfm_ovfl_msg_t pfm_ovfl_msg; |
| pfm_end_msg_t pfm_end_msg; |
| pfm_gen_msg_t pfm_gen_msg; |
| } pfm_msg_t; |
| |
| /* |
| * Define the version numbers for both perfmon as a whole and the sampling buffer format. |
| */ |
| #define PFM_VERSION_MAJ 2U |
| #define PFM_VERSION_MIN 0U |
| #define PFM_VERSION (((PFM_VERSION_MAJ&0xffff)<<16)|(PFM_VERSION_MIN & 0xffff)) |
| #define PFM_VERSION_MAJOR(x) (((x)>>16) & 0xffff) |
| #define PFM_VERSION_MINOR(x) ((x) & 0xffff) |
| |
| |
| /* |
| * miscellaneous architected definitions |
| */ |
| #define PMU_FIRST_COUNTER 4 /* first counting monitor (PMC/PMD) */ |
| #define PMU_MAX_PMCS 256 /* maximum architected number of PMC registers */ |
| #define PMU_MAX_PMDS 256 /* maximum architected number of PMD registers */ |
| |
| #ifdef __KERNEL__ |
| |
| extern long perfmonctl(int fd, int cmd, void *arg, int narg); |
| |
| typedef struct { |
| void (*handler)(int irq, void *arg, struct pt_regs *regs); |
| } pfm_intr_handler_desc_t; |
| |
| extern void pfm_save_regs (struct task_struct *); |
| extern void pfm_load_regs (struct task_struct *); |
| |
| extern void pfm_exit_thread(struct task_struct *); |
| extern int pfm_use_debug_registers(struct task_struct *); |
| extern int pfm_release_debug_registers(struct task_struct *); |
| extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin); |
| extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs); |
| extern void pfm_init_percpu(void); |
| extern void pfm_handle_work(void); |
| extern int pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h); |
| extern int pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h); |
| |
| |
| |
| /* |
| * Reset PMD register flags |
| */ |
| #define PFM_PMD_SHORT_RESET 0 |
| #define PFM_PMD_LONG_RESET 1 |
| |
| typedef union { |
| unsigned int val; |
| struct { |
| unsigned int notify_user:1; /* notify user program of overflow */ |
| unsigned int reset_ovfl_pmds:1; /* reset overflowed PMDs */ |
| unsigned int block_task:1; /* block monitored task on kernel exit */ |
| unsigned int mask_monitoring:1; /* mask monitors via PMCx.plm */ |
| unsigned int reserved:28; /* for future use */ |
| } bits; |
| } pfm_ovfl_ctrl_t; |
| |
| typedef struct { |
| unsigned char ovfl_pmd; /* index of overflowed PMD */ |
| unsigned char ovfl_notify; /* =1 if monitor requested overflow notification */ |
| unsigned short active_set; /* event set active at the time of the overflow */ |
| pfm_ovfl_ctrl_t ovfl_ctrl; /* return: perfmon controls to set by handler */ |
| |
| unsigned long pmd_last_reset; /* last reset value of of the PMD */ |
| unsigned long smpl_pmds[4]; /* bitmask of other PMD of interest on overflow */ |
| unsigned long smpl_pmds_values[PMU_MAX_PMDS]; /* values for the other PMDs of interest */ |
| unsigned long pmd_value; /* current 64-bit value of the PMD */ |
| unsigned long pmd_eventid; /* eventid associated with PMD */ |
| } pfm_ovfl_arg_t; |
| |
| |
| typedef struct { |
| char *fmt_name; |
| pfm_uuid_t fmt_uuid; |
| size_t fmt_arg_size; |
| unsigned long fmt_flags; |
| |
| int (*fmt_validate)(struct task_struct *task, unsigned int flags, int cpu, void *arg); |
| int (*fmt_getsize)(struct task_struct *task, unsigned int flags, int cpu, void *arg, unsigned long *size); |
| int (*fmt_init)(struct task_struct *task, void *buf, unsigned int flags, int cpu, void *arg); |
| int (*fmt_handler)(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct pt_regs *regs, unsigned long stamp); |
| int (*fmt_restart)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs); |
| int (*fmt_restart_active)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs); |
| int (*fmt_exit)(struct task_struct *task, void *buf, struct pt_regs *regs); |
| |
| struct list_head fmt_list; |
| } pfm_buffer_fmt_t; |
| |
| extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt); |
| extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid); |
| |
| /* |
| * perfmon interface exported to modules |
| */ |
| extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs); |
| extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs); |
| extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs); |
| extern int pfm_mod_write_dbrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs); |
| |
| /* |
| * describe the content of the local_cpu_date->pfm_syst_info field |
| */ |
| #define PFM_CPUINFO_SYST_WIDE 0x1 /* if set a system wide session exists */ |
| #define PFM_CPUINFO_DCR_PP 0x2 /* if set the system wide session has started */ |
| #define PFM_CPUINFO_EXCL_IDLE 0x4 /* the system wide session excludes the idle task */ |
| |
| /* |
| * sysctl control structure. visible to sampling formats |
| */ |
| typedef struct { |
| int debug; /* turn on/off debugging via syslog */ |
| int debug_ovfl; /* turn on/off debug printk in overflow handler */ |
| int fastctxsw; /* turn on/off fast (unsecure) ctxsw */ |
| int expert_mode; /* turn on/off value checking */ |
| } pfm_sysctl_t; |
| extern pfm_sysctl_t pfm_sysctl; |
| |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_IA64_PERFMON_H */ |
