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