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1/*
2 * Performance event support - s390 specific definitions.
3 *
4 * Copyright IBM Corp. 2009, 2012
5 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
7 */
8
9#include <asm/cpu_mf.h>
10
11/* CPU-measurement counter facility */
12#define PERF_CPUM_CF_MAX_CTR 160
13
14/* Per-CPU flags for PMU states */
15#define PMU_F_RESERVED 0x1000
16#define PMU_F_ENABLED 0x2000
1/*
2 * Performance event support - s390 specific definitions.
3 *
4 * Copyright IBM Corp. 2009, 2013
5 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
7 */
8
9#ifndef _ASM_S390_PERF_EVENT_H
10#define _ASM_S390_PERF_EVENT_H
11
12#ifdef CONFIG_64BIT
13
14#include <linux/perf_event.h>
15#include <linux/device.h>
16#include <asm/cpu_mf.h>
17
18/* Per-CPU flags for PMU states */
19#define PMU_F_RESERVED 0x1000
20#define PMU_F_ENABLED 0x2000
21#define PMU_F_IN_USE 0x4000
22#define PMU_F_ERR_IBE 0x0100
23#define PMU_F_ERR_LSDA 0x0200
24#define PMU_F_ERR_MASK (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
25
26/* Perf defintions for PMU event attributes in sysfs */
27extern __init const struct attribute_group **cpumf_cf_event_group(void);
28extern ssize_t cpumf_events_sysfs_show(struct device *dev,
29 struct device_attribute *attr,
30 char *page);
31#define EVENT_VAR(_cat, _name) event_attr_##_cat##_##_name
32#define EVENT_PTR(_cat, _name) (&EVENT_VAR(_cat, _name).attr.attr)
33
34#define CPUMF_EVENT_ATTR(cat, name, id) \
35 PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
36#define CPUMF_EVENT_PTR(cat, name) EVENT_PTR(cat, name)
37
38
39/* Perf callbacks */
40struct pt_regs;
41extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
42extern unsigned long perf_misc_flags(struct pt_regs *regs);
43#define perf_misc_flags(regs) perf_misc_flags(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/* Perf PMU definitions for the counter facility */
52#define PERF_CPUM_CF_MAX_CTR 256
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_CPUM_SF_BASIC_MODE 0x0001 /* Basic-sampling flag */
59#define PERF_CPUM_SF_DIAG_MODE 0x0002 /* Diagnostic-sampling flag */
60#define PERF_CPUM_SF_MODE_MASK (PERF_CPUM_SF_BASIC_MODE| \
61 PERF_CPUM_SF_DIAG_MODE)
62#define PERF_CPUM_SF_FULL_BLOCKS 0x0004 /* Process full SDBs only */
63
64#define REG_NONE 0
65#define REG_OVERFLOW 1
66#define OVERFLOW_REG(hwc) ((hwc)->extra_reg.config)
67#define SFB_ALLOC_REG(hwc) ((hwc)->extra_reg.alloc)
68#define RAWSAMPLE_REG(hwc) ((hwc)->config)
69#define TEAR_REG(hwc) ((hwc)->last_tag)
70#define SAMPL_RATE(hwc) ((hwc)->event_base)
71#define SAMPL_FLAGS(hwc) ((hwc)->config_base)
72#define SAMPL_DIAG_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
73#define SDB_FULL_BLOCKS(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
74
75/* Structure for sampling data entries to be passed as perf raw sample data
76 * to user space. Note that raw sample data must be aligned and, thus, might
77 * be padded with zeros.
78 */
79struct sf_raw_sample {
80#define SF_RAW_SAMPLE_BASIC PERF_CPUM_SF_BASIC_MODE
81#define SF_RAW_SAMPLE_DIAG PERF_CPUM_SF_DIAG_MODE
82 u64 format;
83 u32 size; /* Size of sf_raw_sample */
84 u16 bsdes; /* Basic-sampling data entry size */
85 u16 dsdes; /* Diagnostic-sampling data entry size */
86 struct hws_basic_entry basic; /* Basic-sampling data entry */
87 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
88 u8 padding[]; /* Padding to next multiple of 8 */
89} __packed;
90
91/* Perf hardware reserve and release functions */
92int perf_reserve_sampling(void);
93void perf_release_sampling(void);
94
95#endif /* CONFIG_64BIT */
96#endif /* _ASM_S390_PERF_EVENT_H */