127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/* 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 const u64 cpumf_ctr_ctl[CPUMF_CTR_SET_MAX] = {
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[CPUMF_CTR_SET_BASIC] = 0x02,
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[CPUMF_CTR_SET_USER] = 0x04,
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[CPUMF_CTR_SET_CRYPTO] = 0x08,
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[CPUMF_CTR_SET_EXT] = 0x01,
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[CPUMF_CTR_SET_MT_DIAG] = 0x20,
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};
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static inline void ctr_set_enable(u64 *state, int ctr_set)
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{
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*state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT;
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}
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static inline void ctr_set_disable(u64 *state, int ctr_set)
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{
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*state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT);
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}
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static inline void ctr_set_start(u64 *state, int ctr_set)
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{
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*state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT;
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}
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static inline void ctr_set_stop(u64 *state, int ctr_set)
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{
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*state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT);
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}
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static inline void ctr_set_multiple_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_multiple_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_multiple_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_multiple_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, tx_state;
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unsigned int flags;
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unsigned int txn_flags;
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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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#endif /* _ASM_S390_CPU_MCF_H */
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