113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Counter facility support definitions for the Linux perf
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*
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* Copyright IBM Corp. 2019
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* Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
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*/
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#ifndef _ASM_S390_CPU_MCF_H
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#define _ASM_S390_CPU_MCF_H
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#include <linux/perf_event.h>
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#include <asm/cpu_mf.h>
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enum cpumf_ctr_set {
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CPUMF_CTR_SET_BASIC = 0, /* Basic Counter Set */
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CPUMF_CTR_SET_USER = 1, /* Problem-State Counter Set */
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CPUMF_CTR_SET_CRYPTO = 2, /* Crypto-Activity Counter Set */
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CPUMF_CTR_SET_EXT = 3, /* Extended Counter Set */
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CPUMF_CTR_SET_MT_DIAG = 4, /* MT-diagnostic Counter Set */
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/* Maximum number of counter sets */
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CPUMF_CTR_SET_MAX,
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};
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#define CPUMF_LCCTL_ENABLE_SHIFT 16
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#define CPUMF_LCCTL_ACTCTL_SHIFT 0
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static inline void ctr_set_enable(u64 *state, u64 ctrsets)
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{
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*state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
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}
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static inline void ctr_set_disable(u64 *state, u64 ctrsets)
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{
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*state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
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}
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static inline void ctr_set_start(u64 *state, u64 ctrsets)
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{
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*state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
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}
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static inline void ctr_set_stop(u64 *state, u64 ctrsets)
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{
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*state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
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}
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static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
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{
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switch (set) {
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case CPUMF_CTR_SET_BASIC:
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return stcctm(BASIC, range, dest);
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case CPUMF_CTR_SET_USER:
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return stcctm(PROBLEM_STATE, range, dest);
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case CPUMF_CTR_SET_CRYPTO:
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return stcctm(CRYPTO_ACTIVITY, range, dest);
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case CPUMF_CTR_SET_EXT:
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return stcctm(EXTENDED, range, dest);
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case CPUMF_CTR_SET_MT_DIAG:
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return stcctm(MT_DIAG_CLEARING, range, dest);
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case CPUMF_CTR_SET_MAX:
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return 3;
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}
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return 3;
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}
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struct cpu_cf_events {
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struct cpumf_ctr_info info;
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atomic_t ctr_set[CPUMF_CTR_SET_MAX];
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atomic64_t alert;
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u64 state; /* For perf_event_open SVC */
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u64 dev_state; /* For /dev/hwctr */
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unsigned int flags;
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size_t used; /* Bytes used in data */
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size_t usedss; /* Bytes used in start/stop */
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unsigned char start[PAGE_SIZE]; /* Counter set at event add */
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unsigned char stop[PAGE_SIZE]; /* Counter set at event delete */
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unsigned char data[PAGE_SIZE]; /* Counter set at /dev/hwctr */
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unsigned int sets; /* # Counter set saved in memory */
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};
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DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
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bool kernel_cpumcf_avail(void);
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int __kernel_cpumcf_begin(void);
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unsigned long kernel_cpumcf_alert(int clear);
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void __kernel_cpumcf_end(void);
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static inline int kernel_cpumcf_begin(void)
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{
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if (!cpum_cf_avail())
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return -ENODEV;
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preempt_disable();
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return __kernel_cpumcf_begin();
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}
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static inline void kernel_cpumcf_end(void)
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{
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__kernel_cpumcf_end();
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preempt_enable();
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}
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/* Return true if store counter set multiple instruction is available */
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static inline int stccm_avail(void)
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{
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return test_facility(142);
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}
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size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
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struct cpumf_ctr_info *info);
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int cfset_online_cpu(unsigned int cpu);
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int cfset_offline_cpu(unsigned int cpu);
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#endif /* _ASM_S390_CPU_MCF_H */
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