1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Counter facility support definitions for the Linux perf
*
* Copyright IBM Corp. 2019
* Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
*/
#ifndef _ASM_S390_CPU_MCF_H
#define _ASM_S390_CPU_MCF_H
#include <linux/perf_event.h>
#include <asm/cpu_mf.h>
enum cpumf_ctr_set {
CPUMF_CTR_SET_BASIC = 0, /* Basic Counter Set */
CPUMF_CTR_SET_USER = 1, /* Problem-State Counter Set */
CPUMF_CTR_SET_CRYPTO = 2, /* Crypto-Activity Counter Set */
CPUMF_CTR_SET_EXT = 3, /* Extended Counter Set */
CPUMF_CTR_SET_MT_DIAG = 4, /* MT-diagnostic Counter Set */
/* Maximum number of counter sets */
CPUMF_CTR_SET_MAX,
};
#define CPUMF_LCCTL_ENABLE_SHIFT 16
#define CPUMF_LCCTL_ACTCTL_SHIFT 0
static const u64 cpumf_ctr_ctl[CPUMF_CTR_SET_MAX] = {
[CPUMF_CTR_SET_BASIC] = 0x02,
[CPUMF_CTR_SET_USER] = 0x04,
[CPUMF_CTR_SET_CRYPTO] = 0x08,
[CPUMF_CTR_SET_EXT] = 0x01,
[CPUMF_CTR_SET_MT_DIAG] = 0x20,
};
static inline void ctr_set_enable(u64 *state, u64 ctrsets)
{
*state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
}
static inline void ctr_set_disable(u64 *state, u64 ctrsets)
{
*state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
}
static inline void ctr_set_start(u64 *state, u64 ctrsets)
{
*state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
}
static inline void ctr_set_stop(u64 *state, u64 ctrsets)
{
*state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
}
static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
{
switch (set) {
case CPUMF_CTR_SET_BASIC:
return stcctm(BASIC, range, dest);
case CPUMF_CTR_SET_USER:
return stcctm(PROBLEM_STATE, range, dest);
case CPUMF_CTR_SET_CRYPTO:
return stcctm(CRYPTO_ACTIVITY, range, dest);
case CPUMF_CTR_SET_EXT:
return stcctm(EXTENDED, range, dest);
case CPUMF_CTR_SET_MT_DIAG:
return stcctm(MT_DIAG_CLEARING, range, dest);
case CPUMF_CTR_SET_MAX:
return 3;
}
return 3;
}
struct cpu_cf_events {
struct cpumf_ctr_info info;
atomic_t ctr_set[CPUMF_CTR_SET_MAX];
atomic64_t alert;
u64 state; /* For perf_event_open SVC */
u64 dev_state; /* For /dev/hwctr */
unsigned int flags;
size_t used; /* Bytes used in data */
size_t usedss; /* Bytes used in start/stop */
unsigned char start[PAGE_SIZE]; /* Counter set at event add */
unsigned char stop[PAGE_SIZE]; /* Counter set at event delete */
unsigned char data[PAGE_SIZE]; /* Counter set at /dev/hwctr */
unsigned int sets; /* # Counter set saved in memory */
};
DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
bool kernel_cpumcf_avail(void);
int __kernel_cpumcf_begin(void);
unsigned long kernel_cpumcf_alert(int clear);
void __kernel_cpumcf_end(void);
static inline int kernel_cpumcf_begin(void)
{
if (!cpum_cf_avail())
return -ENODEV;
preempt_disable();
return __kernel_cpumcf_begin();
}
static inline void kernel_cpumcf_end(void)
{
__kernel_cpumcf_end();
preempt_enable();
}
/* Return true if store counter set multiple instruction is available */
static inline int stccm_avail(void)
{
return test_facility(142);
}
size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
struct cpumf_ctr_info *info);
int cfset_online_cpu(unsigned int cpu);
int cfset_offline_cpu(unsigned int cpu);
#endif /* _ASM_S390_CPU_MCF_H */
|
