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) &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 /* 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_FULL_BLOCKS	0x0004	  /* Process full SDBs only */
64 #define PERF_CPUM_SF_FREQ_MODE		0x0008	  /* Sampling with frequency */
65 
66 #define REG_NONE		0
67 #define REG_OVERFLOW		1
68 #define OVERFLOW_REG(hwc)	((hwc)->extra_reg.config)
69 #define SFB_ALLOC_REG(hwc)	((hwc)->extra_reg.alloc)
70 #define TEAR_REG(hwc)		((hwc)->last_tag)
71 #define SAMPL_RATE(hwc)		((hwc)->event_base)
72 #define SAMPL_FLAGS(hwc)	((hwc)->config_base)
73 #define SAMPL_DIAG_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
74 #define SDB_FULL_BLOCKS(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
75 #define SAMPLE_FREQ_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
76 
77 #define perf_arch_fetch_caller_regs(regs, __ip) do {			\
78 	(regs)->psw.addr = (__ip);					\
79 	(regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) -	\
80 		offsetof(struct stack_frame, back_chain);		\
81 } while (0)
82 
83 #endif /* _ASM_S390_PERF_EVENT_H */
84