arch/s390/include/asm/perf_event.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Performance event support - s390 specific definitions.
   4  *
   5  * Copyright IBM Corp. 2009, 2017
   6  * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
   7  *            Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
   8  */
   9
  10 #ifndef _ASM_S390_PERF_EVENT_H
  11 #define _ASM_S390_PERF_EVENT_H
  12
  13 #include <linux/perf_event.h>
  14 #include <linux/device.h>
  15 #include <asm/stacktrace.h>
  16
  17 /* Per-CPU flags for PMU states */
  18 #define PMU_F_RESERVED                  0x1000
  19 #define PMU_F_ENABLED                   0x2000
  20 #define PMU_F_IN_USE                    0x4000
  21 #define PMU_F_ERR_IBE                   0x0100
  22 #define PMU_F_ERR_LSDA                  0x0200
  23 #define PMU_F_ERR_MASK                  (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
  24
  25 /* Perf definitions for PMU event attributes in sysfs */
  26 extern __init const struct attribute_group **cpumf_cf_event_group(void);
  27 extern ssize_t cpumf_events_sysfs_show(struct device *dev,
  28                                        struct device_attribute *attr,
  29                                        char *page);
  30 #define EVENT_VAR(_cat, _name)          event_attr_##_cat##_##_name
  31 #define EVENT_PTR(_cat, _name)          (&EVENT_VAR(_cat, _name).attr.attr)
  32
  33 #define CPUMF_EVENT_ATTR(cat, name, id)                 \
  34         PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
  35 #define CPUMF_EVENT_PTR(cat, name)      EVENT_PTR(cat, name)
  36
  37
  38 /* Perf callbacks */
  39 struct pt_regs;
  40 extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
  41 extern unsigned long perf_misc_flags(struct pt_regs *regs);
  42 #define perf_misc_flags(regs) perf_misc_flags(regs)
  43 #define perf_arch_bpf_user_pt_regs(regs) &regs->user_regs
  44
  45 /* Perf pt_regs extension for sample-data-entry indicators */
  46 struct perf_sf_sde_regs {
  47         unsigned char in_guest:1;         /* guest sample */
  48         unsigned long reserved:63;        /* reserved */
  49 };
  50
  51 /* Perf PMU definitions for the counter facility */
  52 #define PERF_CPUM_CF_MAX_CTR            0xffffUL  /* Max ctr for ECCTR */
  53
  54 /* Perf PMU definitions for the sampling facility */
  55 #define PERF_CPUM_SF_MAX_CTR            2
  56 #define PERF_EVENT_CPUM_SF              0xB0000UL /* Event: Basic-sampling */
  57 #define PERF_EVENT_CPUM_SF_DIAG         0xBD000UL /* Event: Combined-sampling */
  58 #define PERF_EVENT_CPUM_CF_DIAG         0xBC000UL /* Event: Counter sets */
  59 #define PERF_CPUM_SF_BASIC_MODE         0x0001    /* Basic-sampling flag */
  60 #define PERF_CPUM_SF_DIAG_MODE          0x0002    /* Diagnostic-sampling flag */
  61 #define PERF_CPUM_SF_MODE_MASK          (PERF_CPUM_SF_BASIC_MODE| \
  62                                          PERF_CPUM_SF_DIAG_MODE)
  63 #define PERF_CPUM_SF_FULL_BLOCKS        0x0004    /* Process full SDBs only */
  64 #define PERF_CPUM_SF_FREQ_MODE          0x0008    /* Sampling with frequency */
  65
  66 #define REG_NONE                0
  67 #define REG_OVERFLOW            1
  68 #define OVERFLOW_REG(hwc)       ((hwc)->extra_reg.config)
  69 #define SFB_ALLOC_REG(hwc)      ((hwc)->extra_reg.alloc)
  70 #define TEAR_REG(hwc)           ((hwc)->last_tag)
  71 #define SAMPL_RATE(hwc)         ((hwc)->event_base)
  72 #define SAMPL_FLAGS(hwc)        ((hwc)->config_base)
  73 #define SAMPL_DIAG_MODE(hwc)    (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
  74 #define SDB_FULL_BLOCKS(hwc)    (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
  75 #define SAMPLE_FREQ_MODE(hwc)   (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
  76
  77 #define perf_arch_fetch_caller_regs(regs, __ip) do {                    \
  78         (regs)->psw.addr = (__ip);                                      \
  79         (regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) -  \
  80                 offsetof(struct stack_frame, back_chain);               \
  81 } while (0)
  82
  83 #endif /* _ASM_S390_PERF_EVENT_H */