path: root/arch/s390/include/asm/cpu_mcf.h

/* 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, int ctr_set)
{
	*state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT;
}
static inline void ctr_set_disable(u64 *state, int ctr_set)
{
	*state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT);
}
static inline void ctr_set_start(u64 *state, int ctr_set)
{
	*state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT;
}
static inline void ctr_set_stop(u64 *state, int ctr_set)
{
	*state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT);
}

struct cpu_cf_events {
	struct cpumf_ctr_info	info;
	atomic_t		ctr_set[CPUMF_CTR_SET_MAX];
	atomic64_t		alert;
	u64			state, tx_state;
	unsigned int		flags;
	unsigned int		txn_flags;
};
DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);

int __kernel_cpumcf_begin(void);
unsigned long kernel_cpumcf_alert(int clear);
void __kernel_cpumcf_end(void);

#endif /* _ASM_S390_CPU_MCF_H */