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_instruction_pointer(struct pt_regs *regs);
41 extern unsigned long perf_misc_flags(struct pt_regs *regs);
42 #define perf_misc_flags(regs) perf_misc_flags(regs)
43 #define perf_arch_bpf_user_pt_regs(regs) ®s->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 /* Perf PMU definitions for the counter facility */
52 #define PERF_CPUM_CF_MAX_CTR 0xffffUL /* Max ctr for ECCTR */
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_EVENT_CPUM_CF_DIAG 0xBC000UL /* Event: Counter sets */
59 #define PERF_CPUM_SF_BASIC_MODE 0x0001 /* Basic-sampling flag */
60 #define PERF_CPUM_SF_DIAG_MODE 0x0002 /* Diagnostic-sampling flag */
61 #define PERF_CPUM_SF_MODE_MASK (PERF_CPUM_SF_BASIC_MODE| \
62 PERF_CPUM_SF_DIAG_MODE)
63 #define PERF_CPUM_SF_FREQ_MODE 0x0008 /* Sampling with frequency */
64
65 #define REG_NONE 0
66 #define REG_OVERFLOW 1
67 #define OVERFLOW_REG(hwc) ((hwc)->extra_reg.config)
68 #define SFB_ALLOC_REG(hwc) ((hwc)->extra_reg.alloc)
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 SAMPLE_FREQ_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
74
75 #define perf_arch_fetch_caller_regs(regs, __ip) do { \
76 (regs)->psw.addr = (__ip); \
77 (regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) - \
78 offsetof(struct stack_frame, back_chain); \
79 } while (0)
80
81 #endif /* _ASM_S390_PERF_EVENT_H */
82
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