File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/ia64/include/asm/perfmon.h b/arch/ia64/include/asm/perfmon.h
new file mode 100644
index 0000000..15476dd
--- /dev/null
+++ b/arch/ia64/include/asm/perfmon.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2001-2003 Hewlett-Packard Co
+ * Stephane Eranian <eranian@hpl.hp.com>
+ */
+#ifndef _ASM_IA64_PERFMON_H
+#define _ASM_IA64_PERFMON_H
+
+#include <uapi/asm/perfmon.h>
+
+
+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 /* _ASM_IA64_PERFMON_H */