/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Performance event support - s390 specific definitions.
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*
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* Copyright IBM Corp. 2009, 2017
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
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*/
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#ifndef _ASM_S390_PERF_EVENT_H
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#define _ASM_S390_PERF_EVENT_H
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#include <linux/perf_event.h>
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#include <linux/device.h>
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#include <asm/stacktrace.h>
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/* Per-CPU flags for PMU states */
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#define PMU_F_RESERVED 0x1000
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#define PMU_F_ENABLED 0x2000
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#define PMU_F_IN_USE 0x4000
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#define PMU_F_ERR_IBE 0x0100
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#define PMU_F_ERR_LSDA 0x0200
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#define PMU_F_ERR_MASK (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
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/* Perf definitions for PMU event attributes in sysfs */
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extern __init const struct attribute_group **cpumf_cf_event_group(void);
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extern ssize_t cpumf_events_sysfs_show(struct device *dev,
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struct device_attribute *attr,
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char *page);
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#define EVENT_VAR(_cat, _name) event_attr_##_cat##_##_name
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#define EVENT_PTR(_cat, _name) (&EVENT_VAR(_cat, _name).attr.attr)
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#define CPUMF_EVENT_ATTR(cat, name, id) \
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PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
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#define CPUMF_EVENT_PTR(cat, name) EVENT_PTR(cat, name)
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/* Perf callbacks */
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struct pt_regs;
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extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
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extern unsigned long perf_misc_flags(struct pt_regs *regs);
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#define perf_misc_flags(regs) perf_misc_flags(regs)
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#define perf_arch_bpf_user_pt_regs(regs) ®s->user_regs
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/* Perf pt_regs extension for sample-data-entry indicators */
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struct perf_sf_sde_regs {
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unsigned char in_guest:1; /* guest sample */
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unsigned long reserved:63; /* reserved */
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};
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/* Perf PMU definitions for the counter facility */
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#define PERF_CPUM_CF_MAX_CTR 0xffffUL /* Max ctr for ECCTR */
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/* Perf PMU definitions for the sampling facility */
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#define PERF_CPUM_SF_MAX_CTR 2
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#define PERF_EVENT_CPUM_SF 0xB0000UL /* Event: Basic-sampling */
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#define PERF_EVENT_CPUM_SF_DIAG 0xBD000UL /* Event: Combined-sampling */
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#define PERF_EVENT_CPUM_CF_DIAG 0xBC000UL /* Event: Counter sets */
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#define PERF_CPUM_SF_BASIC_MODE 0x0001 /* Basic-sampling flag */
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#define PERF_CPUM_SF_DIAG_MODE 0x0002 /* Diagnostic-sampling flag */
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#define PERF_CPUM_SF_MODE_MASK (PERF_CPUM_SF_BASIC_MODE| \
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PERF_CPUM_SF_DIAG_MODE)
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#define PERF_CPUM_SF_FULL_BLOCKS 0x0004 /* Process full SDBs only */
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#define PERF_CPUM_SF_FREQ_MODE 0x0008 /* Sampling with frequency */
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#define REG_NONE 0
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#define REG_OVERFLOW 1
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#define OVERFLOW_REG(hwc) ((hwc)->extra_reg.config)
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#define SFB_ALLOC_REG(hwc) ((hwc)->extra_reg.alloc)
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#define TEAR_REG(hwc) ((hwc)->last_tag)
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#define SAMPL_RATE(hwc) ((hwc)->event_base)
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#define SAMPL_FLAGS(hwc) ((hwc)->config_base)
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#define SAMPL_DIAG_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
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#define SDB_FULL_BLOCKS(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
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#define SAMPLE_FREQ_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
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#define perf_arch_fetch_caller_regs(regs, __ip) do { \
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(regs)->psw.addr = (__ip); \
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(regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) - \
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offsetof(struct stack_frame, back_chain); \
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} while (0)
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#endif /* _ASM_S390_PERF_EVENT_H */
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