1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Counter facility support definitions for the Linux perf
5 * Copyright IBM Corp. 2019
6 * Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
8 #ifndef _ASM_S390_CPU_MCF_H
9 #define _ASM_S390_CPU_MCF_H
11 #include <linux/perf_event.h>
12 #include <asm/cpu_mf.h>
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 */
21 /* Maximum number of counter sets */
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,
35 static inline void ctr_set_enable(u64 *state, u64 ctrsets)
37 *state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
40 static inline void ctr_set_disable(u64 *state, u64 ctrsets)
42 *state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
45 static inline void ctr_set_start(u64 *state, u64 ctrsets)
47 *state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
50 static inline void ctr_set_stop(u64 *state, u64 ctrsets)
52 *state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
55 static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
58 case CPUMF_CTR_SET_BASIC:
59 return stcctm(BASIC, range, dest);
60 case CPUMF_CTR_SET_USER:
61 return stcctm(PROBLEM_STATE, range, dest);
62 case CPUMF_CTR_SET_CRYPTO:
63 return stcctm(CRYPTO_ACTIVITY, range, dest);
64 case CPUMF_CTR_SET_EXT:
65 return stcctm(EXTENDED, range, dest);
66 case CPUMF_CTR_SET_MT_DIAG:
67 return stcctm(MT_DIAG_CLEARING, range, dest);
68 case CPUMF_CTR_SET_MAX:
74 struct cpu_cf_events {
75 struct cpumf_ctr_info info;
76 atomic_t ctr_set[CPUMF_CTR_SET_MAX];
78 u64 state; /* For perf_event_open SVC */
79 u64 dev_state; /* For /dev/hwctr */
81 size_t used; /* Bytes used in data */
82 size_t usedss; /* Bytes used in start/stop */
83 unsigned char start[PAGE_SIZE]; /* Counter set at event add */
84 unsigned char stop[PAGE_SIZE]; /* Counter set at event delete */
85 unsigned char data[PAGE_SIZE]; /* Counter set at /dev/hwctr */
86 unsigned int sets; /* # Counter set saved in memory */
88 DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
90 bool kernel_cpumcf_avail(void);
91 int __kernel_cpumcf_begin(void);
92 unsigned long kernel_cpumcf_alert(int clear);
93 void __kernel_cpumcf_end(void);
95 static inline int kernel_cpumcf_begin(void)
101 return __kernel_cpumcf_begin();
103 static inline void kernel_cpumcf_end(void)
105 __kernel_cpumcf_end();
109 /* Return true if store counter set multiple instruction is available */
110 static inline int stccm_avail(void)
112 return test_facility(142);
115 size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
116 struct cpumf_ctr_info *info);
117 int cfset_online_cpu(unsigned int cpu);
118 int cfset_offline_cpu(unsigned int cpu);
119 #endif /* _ASM_S390_CPU_MCF_H */