1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Counter facility support definitions for the Linux perf
4 *
5 * Copyright IBM Corp. 2019
6 * Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
7 */
8 #ifndef _ASM_S390_CPU_MCF_H
9 #define _ASM_S390_CPU_MCF_H
10
11 #include <linux/perf_event.h>
12 #include <asm/cpu_mf.h>
13
14 enum cpumf_ctr_set {
15 CPUMF_CTR_SET_BASIC = 0, /* Basic Counter Set */
16 CPUMF_CTR_SET_USER = 1, /* Problem-State Counter Set */
17 CPUMF_CTR_SET_CRYPTO = 2, /* Crypto-Activity Counter Set */
18 CPUMF_CTR_SET_EXT = 3, /* Extended Counter Set */
19 CPUMF_CTR_SET_MT_DIAG = 4, /* MT-diagnostic Counter Set */
20
21 /* Maximum number of counter sets */
22 CPUMF_CTR_SET_MAX,
23 };
24
25 #define CPUMF_LCCTL_ENABLE_SHIFT 16
26 #define CPUMF_LCCTL_ACTCTL_SHIFT 0
27 static const u64 cpumf_ctr_ctl[CPUMF_CTR_SET_MAX] = {
28 [CPUMF_CTR_SET_BASIC] = 0x02,
29 [CPUMF_CTR_SET_USER] = 0x04,
30 [CPUMF_CTR_SET_CRYPTO] = 0x08,
31 [CPUMF_CTR_SET_EXT] = 0x01,
32 [CPUMF_CTR_SET_MT_DIAG] = 0x20,
33 };
34
ctr_set_enable(u64 * state,int ctr_set)35 static inline void ctr_set_enable(u64 *state, int ctr_set)
36 {
37 *state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT;
38 }
ctr_set_disable(u64 * state,int ctr_set)39 static inline void ctr_set_disable(u64 *state, int ctr_set)
40 {
41 *state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT);
42 }
ctr_set_start(u64 * state,int ctr_set)43 static inline void ctr_set_start(u64 *state, int ctr_set)
44 {
45 *state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT;
46 }
ctr_set_stop(u64 * state,int ctr_set)47 static inline void ctr_set_stop(u64 *state, int ctr_set)
48 {
49 *state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT);
50 }
51
ctr_set_multiple_enable(u64 * state,u64 ctrsets)52 static inline void ctr_set_multiple_enable(u64 *state, u64 ctrsets)
53 {
54 *state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
55 }
56
ctr_set_multiple_disable(u64 * state,u64 ctrsets)57 static inline void ctr_set_multiple_disable(u64 *state, u64 ctrsets)
58 {
59 *state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
60 }
61
ctr_set_multiple_start(u64 * state,u64 ctrsets)62 static inline void ctr_set_multiple_start(u64 *state, u64 ctrsets)
63 {
64 *state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
65 }
66
ctr_set_multiple_stop(u64 * state,u64 ctrsets)67 static inline void ctr_set_multiple_stop(u64 *state, u64 ctrsets)
68 {
69 *state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
70 }
71
ctr_stcctm(enum cpumf_ctr_set set,u64 range,u64 * dest)72 static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
73 {
74 switch (set) {
75 case CPUMF_CTR_SET_BASIC:
76 return stcctm(BASIC, range, dest);
77 case CPUMF_CTR_SET_USER:
78 return stcctm(PROBLEM_STATE, range, dest);
79 case CPUMF_CTR_SET_CRYPTO:
80 return stcctm(CRYPTO_ACTIVITY, range, dest);
81 case CPUMF_CTR_SET_EXT:
82 return stcctm(EXTENDED, range, dest);
83 case CPUMF_CTR_SET_MT_DIAG:
84 return stcctm(MT_DIAG_CLEARING, range, dest);
85 case CPUMF_CTR_SET_MAX:
86 return 3;
87 }
88 return 3;
89 }
90
91 struct cpu_cf_events {
92 struct cpumf_ctr_info info;
93 atomic_t ctr_set[CPUMF_CTR_SET_MAX];
94 atomic64_t alert;
95 u64 state, tx_state;
96 unsigned int flags;
97 unsigned int txn_flags;
98 };
99 DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
100
101 bool kernel_cpumcf_avail(void);
102 int __kernel_cpumcf_begin(void);
103 unsigned long kernel_cpumcf_alert(int clear);
104 void __kernel_cpumcf_end(void);
105
kernel_cpumcf_begin(void)106 static inline int kernel_cpumcf_begin(void)
107 {
108 if (!cpum_cf_avail())
109 return -ENODEV;
110
111 preempt_disable();
112 return __kernel_cpumcf_begin();
113 }
kernel_cpumcf_end(void)114 static inline void kernel_cpumcf_end(void)
115 {
116 __kernel_cpumcf_end();
117 preempt_enable();
118 }
119
120 /* Return true if store counter set multiple instruction is available */
stccm_avail(void)121 static inline int stccm_avail(void)
122 {
123 return test_facility(142);
124 }
125
126 #endif /* _ASM_S390_CPU_MCF_H */
127
