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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | // SPDX-License-Identifier: GPL-2.0+ /* * driver/base/topology.c - Populate sysfs with cpu topology information * * Written by: Zhang Yanmin, Intel Corporation * * Copyright (C) 2006, Intel Corp. * * All rights reserved. */ #include <linux/mm.h> #include <linux/cpu.h> #include <linux/module.h> #include <linux/hardirq.h> #include <linux/topology.h> #define define_id_show_func(name) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ return sysfs_emit(buf, "%d\n", topology_##name(dev->id)); \ } #define define_siblings_show_map(name, mask) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\ } #define define_siblings_show_list(name, mask) \ static ssize_t name##_list_show(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\ } #define define_siblings_show_func(name, mask) \ define_siblings_show_map(name, mask); \ define_siblings_show_list(name, mask) define_id_show_func(physical_package_id); static DEVICE_ATTR_RO(physical_package_id); define_id_show_func(die_id); static DEVICE_ATTR_RO(die_id); define_id_show_func(core_id); static DEVICE_ATTR_RO(core_id); define_siblings_show_func(thread_siblings, sibling_cpumask); static DEVICE_ATTR_RO(thread_siblings); static DEVICE_ATTR_RO(thread_siblings_list); define_siblings_show_func(core_cpus, sibling_cpumask); static DEVICE_ATTR_RO(core_cpus); static DEVICE_ATTR_RO(core_cpus_list); define_siblings_show_func(core_siblings, core_cpumask); static DEVICE_ATTR_RO(core_siblings); static DEVICE_ATTR_RO(core_siblings_list); define_siblings_show_func(die_cpus, die_cpumask); static DEVICE_ATTR_RO(die_cpus); static DEVICE_ATTR_RO(die_cpus_list); define_siblings_show_func(package_cpus, core_cpumask); static DEVICE_ATTR_RO(package_cpus); static DEVICE_ATTR_RO(package_cpus_list); #ifdef CONFIG_SCHED_BOOK define_id_show_func(book_id); static DEVICE_ATTR_RO(book_id); define_siblings_show_func(book_siblings, book_cpumask); static DEVICE_ATTR_RO(book_siblings); static DEVICE_ATTR_RO(book_siblings_list); #endif #ifdef CONFIG_SCHED_DRAWER define_id_show_func(drawer_id); static DEVICE_ATTR_RO(drawer_id); define_siblings_show_func(drawer_siblings, drawer_cpumask); static DEVICE_ATTR_RO(drawer_siblings); static DEVICE_ATTR_RO(drawer_siblings_list); #endif static struct attribute *default_attrs[] = { &dev_attr_physical_package_id.attr, &dev_attr_die_id.attr, &dev_attr_core_id.attr, &dev_attr_thread_siblings.attr, &dev_attr_thread_siblings_list.attr, &dev_attr_core_cpus.attr, &dev_attr_core_cpus_list.attr, &dev_attr_core_siblings.attr, &dev_attr_core_siblings_list.attr, &dev_attr_die_cpus.attr, &dev_attr_die_cpus_list.attr, &dev_attr_package_cpus.attr, &dev_attr_package_cpus_list.attr, #ifdef CONFIG_SCHED_BOOK &dev_attr_book_id.attr, &dev_attr_book_siblings.attr, &dev_attr_book_siblings_list.attr, #endif #ifdef CONFIG_SCHED_DRAWER &dev_attr_drawer_id.attr, &dev_attr_drawer_siblings.attr, &dev_attr_drawer_siblings_list.attr, #endif NULL }; static const struct attribute_group topology_attr_group = { .attrs = default_attrs, .name = "topology" }; /* Add/Remove cpu_topology interface for CPU device */ static int topology_add_dev(unsigned int cpu) { struct device *dev = get_cpu_device(cpu); return sysfs_create_group(&dev->kobj, &topology_attr_group); } static int topology_remove_dev(unsigned int cpu) { struct device *dev = get_cpu_device(cpu); sysfs_remove_group(&dev->kobj, &topology_attr_group); return 0; } static int __init topology_sysfs_init(void) { return cpuhp_setup_state(CPUHP_TOPOLOGY_PREPARE, "base/topology:prepare", topology_add_dev, topology_remove_dev); } device_initcall(topology_sysfs_init); |