| /* 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 |
