[linux-block.git] / arch / s390 / include / asm / perf_event.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Performance event support - s390 specific definitions.
 *
 * Copyright IBM Corp. 2009, 2017
 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 *	      Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
 */

#ifndef _ASM_S390_PERF_EVENT_H
#define _ASM_S390_PERF_EVENT_H

#include <linux/perf_event.h>
#include <linux/device.h>
#include <asm/stacktrace.h>

/* Per-CPU flags for PMU states */
#define PMU_F_RESERVED			0x1000
#define PMU_F_ENABLED			0x2000
#define PMU_F_IN_USE			0x4000
#define PMU_F_ERR_IBE			0x0100
#define PMU_F_ERR_LSDA			0x0200
#define PMU_F_ERR_MASK			(PMU_F_ERR_IBE|PMU_F_ERR_LSDA)

/* Perf definitions for PMU event attributes in sysfs */
extern __init const struct attribute_group **cpumf_cf_event_group(void);
extern ssize_t cpumf_events_sysfs_show(struct device *dev,
				       struct device_attribute *attr,
				       char *page);
#define EVENT_VAR(_cat, _name)		event_attr_##_cat##_##_name
#define EVENT_PTR(_cat, _name)		(&EVENT_VAR(_cat, _name).attr.attr)

#define CPUMF_EVENT_ATTR(cat, name, id)			\
	PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
#define CPUMF_EVENT_PTR(cat, name)	EVENT_PTR(cat, name)


/* Perf callbacks */
struct pt_regs;
extern unsigned long perf_arch_instruction_pointer(struct pt_regs *regs);
extern unsigned long perf_arch_misc_flags(struct pt_regs *regs);
#define perf_arch_misc_flags(regs) perf_arch_misc_flags(regs)
#define perf_arch_bpf_user_pt_regs(regs) &regs->user_regs

/* Perf pt_regs extension for sample-data-entry indicators */
struct perf_sf_sde_regs {
	unsigned char in_guest:1;	  /* guest sample */
	unsigned long reserved:63;	  /* reserved */
};

#define perf_arch_fetch_caller_regs(regs, __ip) do {			\
	(regs)->psw.mask = 0;						\
	(regs)->psw.addr = (__ip);					\
	(regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) -	\
		offsetof(struct stack_frame, back_chain);		\
} while (0)

#endif /* _ASM_S390_PERF_EVENT_H */
Commit	Line	Data
	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_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 */