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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright IBM Corp. 2021
* Interface implementation for communication with the CPU Measurement
* counter facility device driver.
*
* Author(s): Thomas Richter <tmricht@linux.ibm.com>
*
* Define for ioctl() commands to communicate with the CPU Measurement
* counter facility device driver.
*/
#ifndef _PERF_CPUM_CF_DIAG_H
#define _PERF_CPUM_CF_DIAG_H
#include <linux/ioctl.h>
#include <linux/types.h>
#define S390_HWCTR_DEVICE "hwctr"
#define S390_HWCTR_START_VERSION 1
struct s390_ctrset_start { /* Set CPUs to operate on */
__u64 version; /* Version of interface */
__u64 data_bytes; /* # of bytes required */
__u64 cpumask_len; /* Length of CPU mask in bytes */
__u64 *cpumask; /* Pointer to CPU mask */
__u64 counter_sets; /* Bit mask of counter sets to get */
};
struct s390_ctrset_setdata { /* Counter set data */
__u32 set; /* Counter set number */
__u32 no_cnts; /* # of counters stored in cv[] */
__u64 cv[0]; /* Counter values (variable length) */
};
struct s390_ctrset_cpudata { /* Counter set data per CPU */
__u32 cpu_nr; /* CPU number */
__u32 no_sets; /* # of counters sets in data[] */
struct s390_ctrset_setdata data[0];
};
struct s390_ctrset_read { /* Structure to get all ctr sets */
__u64 no_cpus; /* Total # of CPUs data taken from */
struct s390_ctrset_cpudata data[0];
};
#define S390_HWCTR_MAGIC 'C' /* Random magic # for ioctls */
#define S390_HWCTR_START _IOWR(S390_HWCTR_MAGIC, 1, struct s390_ctrset_start)
#define S390_HWCTR_STOP _IO(S390_HWCTR_MAGIC, 2)
#define S390_HWCTR_READ _IOWR(S390_HWCTR_MAGIC, 3, struct s390_ctrset_read)
#endif
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