arch/s390/include/asm/perf_event.h

   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 defintions for PMU event attributes in sysfs */
  25 extern __init const struct attribute_group **cpumf_cf_event_group(void);
  26 extern 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 */
  38 struct pt_regs;
  39 extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
  40 extern 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 */
  44 struct 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  */
  77 struct 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
  91 int perf_reserve_sampling(void);
  92 void perf_release_sampling(void);
  93 #else /* CONFIG_PERF_EVENTS */
  94 static inline int perf_reserve_sampling(void)
  95 {
  96         return 0;
  97 }
  98 static inline void perf_release_sampling(void) {}
  99 #endif /* CONFIG_PERF_EVENTS */
 100
 101 #endif /* _ASM_S390_PERF_EVENT_H */