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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 <[email protected]>
- *
- * 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[]; /* 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[];
- };
- struct s390_ctrset_read { /* Structure to get all ctr sets */
- __u64 no_cpus; /* Total # of CPUs data taken from */
- struct s390_ctrset_cpudata data[];
- };
- #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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