LXR linux/arch/s390/include/asm/perf

   1/*
   2 * Performance event support - s390 specific definitions.
   3 *
   4 * Copyright IBM Corp. 2009, 2013
   5 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
   6 *            Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
   7 */
   8
   9#ifndef _ASM_S390_PERF_EVENT_H
  10#define _ASM_S390_PERF_EVENT_H
  11
  12#include <linux/perf_event.h>
  13#include <linux/device.h>
  14#include <asm/cpu_mf.h>
  15
  16/* Per-CPU flags for PMU states */
  17#define PMU_F_RESERVED                  0x1000
  18#define PMU_F_ENABLED                   0x2000
  19#define PMU_F_IN_USE                    0x4000
  20#define PMU_F_ERR_IBE                   0x0100
  21#define PMU_F_ERR_LSDA                  0x0200
  22#define PMU_F_ERR_MASK                  (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
  23
  24/* Perf definitions for PMU event attributes in sysfs */
  25extern __init const struct attribute_group **cpumf_cf_event_group(void);
  26extern ssize_t cpumf_events_sysfs_show(struct device *dev,
  27                                       struct device_attribute *attr,
  28                                       char *page);
  29#define EVENT_VAR(_cat, _name)          event_attr_##_cat##_##_name
  30#define EVENT_PTR(_cat, _name)          (&EVENT_VAR(_cat, _name).attr.attr)
  31
  32#define CPUMF_EVENT_ATTR(cat, name, id)                 \
  33        PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
  34#define CPUMF_EVENT_PTR(cat, name)      EVENT_PTR(cat, name)
  35
  36
  37/* Perf callbacks */
  38struct pt_regs;
  39extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
  40extern unsigned long perf_misc_flags(struct pt_regs *regs);
  41#define perf_misc_flags(regs) perf_misc_flags(regs)
  42
  43/* Perf pt_regs extension for sample-data-entry indicators */
  44struct perf_sf_sde_regs {
  45        unsigned char in_guest:1;         /* guest sample */
  46        unsigned long reserved:63;        /* reserved */
  47};
  48
  49/* Perf PMU definitions for the counter facility */
  50#define PERF_CPUM_CF_MAX_CTR            256
  51
  52/* Perf PMU definitions for the sampling facility */
  53#define PERF_CPUM_SF_MAX_CTR            2
  54#define PERF_EVENT_CPUM_SF              0xB0000UL /* Event: Basic-sampling */
  55#define PERF_EVENT_CPUM_SF_DIAG         0xBD000UL /* Event: Combined-sampling */
  56#define PERF_CPUM_SF_BASIC_MODE         0x0001    /* Basic-sampling flag */
  57#define PERF_CPUM_SF_DIAG_MODE          0x0002    /* Diagnostic-sampling flag */
  58#define PERF_CPUM_SF_MODE_MASK          (PERF_CPUM_SF_BASIC_MODE| \
  59                                         PERF_CPUM_SF_DIAG_MODE)
  60#define PERF_CPUM_SF_FULL_BLOCKS        0x0004    /* Process full SDBs only */
  61
  62#define REG_NONE                0
  63#define REG_OVERFLOW            1
  64#define OVERFLOW_REG(hwc)       ((hwc)->extra_reg.config)
  65#define SFB_ALLOC_REG(hwc)      ((hwc)->extra_reg.alloc)
  66#define RAWSAMPLE_REG(hwc)      ((hwc)->config)
  67#define TEAR_REG(hwc)           ((hwc)->last_tag)
  68#define SAMPL_RATE(hwc)         ((hwc)->event_base)
  69#define SAMPL_FLAGS(hwc)        ((hwc)->config_base)
  70#define SAMPL_DIAG_MODE(hwc)    (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
  71#define SDB_FULL_BLOCKS(hwc)    (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
  72
  73/* Structure for sampling data entries to be passed as perf raw sample data
  74 * to user space.  Note that raw sample data must be aligned and, thus, might
  75 * be padded with zeros.
  76 */
  77struct sf_raw_sample {
  78#define SF_RAW_SAMPLE_BASIC     PERF_CPUM_SF_BASIC_MODE
  79#define SF_RAW_SAMPLE_DIAG      PERF_CPUM_SF_DIAG_MODE
  80        u64                     format;
  81        u32                      size;    /* Size of sf_raw_sample */
  82        u16                     bsdes;    /* Basic-sampling data entry size */
  83        u16                     dsdes;    /* Diagnostic-sampling data entry size */
  84        struct hws_basic_entry  basic;    /* Basic-sampling data entry */
  85        struct hws_diag_entry    diag;    /* Diagnostic-sampling data entry */
  86        u8                  padding[];    /* Padding to next multiple of 8 */
  87} __packed;
  88
  89/* Perf hardware reserve and release functions */
  90#ifdef CONFIG_PERF_EVENTS
  91int perf_reserve_sampling(void);
  92void perf_release_sampling(void);
  93#else /* CONFIG_PERF_EVENTS */
  94static inline int perf_reserve_sampling(void)
  95{
  96        return 0;
  97}
  98static inline void perf_release_sampling(void) {}
  99#endif /* CONFIG_PERF_EVENTS */
 100
 101#endif /* _ASM_S390_PERF_EVENT_H */
 102