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 */
26extern __init const struct attribute_group **cpumf_cf_event_group(void);
27extern 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 */
39struct pt_regs;
40extern unsigned long perf_arch_instruction_pointer(struct pt_regs *regs);
41extern 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 */
46struct 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 */