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 <[email protected]>
   7  *            Hendrik Brueckner <[email protected]>
   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_arch_instruction_pointer(struct pt_regs *regs);
  41 extern unsigned long perf_arch_misc_flags(struct pt_regs *regs);
  42 #define perf_arch_misc_flags(regs) perf_arch_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 #define perf_arch_fetch_caller_regs(regs, __ip) do {                    \
  52         (regs)->psw.mask = 0;                                           \
  53         (regs)->psw.addr = (__ip);                                      \
  54         (regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) -  \
  55                 offsetof(struct stack_frame, back_chain);               \
  56 } while (0)
  57
  58 #endif /* _ASM_S390_PERF_EVENT_H */