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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 | // 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, fmt) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ return sysfs_emit(buf, fmt "\n", topology_##name(dev->id)); \ } #define define_siblings_read_func(name, mask) \ static ssize_t name##_read(struct file *file, struct kobject *kobj, \ struct bin_attribute *attr, char *buf, \ loff_t off, size_t count) \ { \ struct device *dev = kobj_to_dev(kobj); \ \ return cpumap_print_bitmask_to_buf(buf, topology_##mask(dev->id), \ off, count); \ } \ \ static ssize_t name##_list_read(struct file *file, struct kobject *kobj, \ struct bin_attribute *attr, char *buf, \ loff_t off, size_t count) \ { \ struct device *dev = kobj_to_dev(kobj); \ \ return cpumap_print_list_to_buf(buf, topology_##mask(dev->id), \ off, count); \ } define_id_show_func(physical_package_id, "%d"); static DEVICE_ATTR_RO(physical_package_id); #ifdef TOPOLOGY_DIE_SYSFS define_id_show_func(die_id, "%d"); static DEVICE_ATTR_RO(die_id); #endif #ifdef TOPOLOGY_CLUSTER_SYSFS define_id_show_func(cluster_id, "%d"); static DEVICE_ATTR_RO(cluster_id); #endif define_id_show_func(core_id, "%d"); static DEVICE_ATTR_RO(core_id); define_id_show_func(ppin, "0x%llx"); static DEVICE_ATTR_ADMIN_RO(ppin); define_siblings_read_func(thread_siblings, sibling_cpumask); static BIN_ATTR_RO(thread_siblings, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(thread_siblings_list, CPULIST_FILE_MAX_BYTES); define_siblings_read_func(core_cpus, sibling_cpumask); static BIN_ATTR_RO(core_cpus, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(core_cpus_list, CPULIST_FILE_MAX_BYTES); define_siblings_read_func(core_siblings, core_cpumask); static BIN_ATTR_RO(core_siblings, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(core_siblings_list, CPULIST_FILE_MAX_BYTES); #ifdef TOPOLOGY_CLUSTER_SYSFS define_siblings_read_func(cluster_cpus, cluster_cpumask); static BIN_ATTR_RO(cluster_cpus, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(cluster_cpus_list, CPULIST_FILE_MAX_BYTES); #endif #ifdef TOPOLOGY_DIE_SYSFS define_siblings_read_func(die_cpus, die_cpumask); static BIN_ATTR_RO(die_cpus, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(die_cpus_list, CPULIST_FILE_MAX_BYTES); #endif define_siblings_read_func(package_cpus, core_cpumask); static BIN_ATTR_RO(package_cpus, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(package_cpus_list, CPULIST_FILE_MAX_BYTES); #ifdef TOPOLOGY_BOOK_SYSFS define_id_show_func(book_id, "%d"); static DEVICE_ATTR_RO(book_id); define_siblings_read_func(book_siblings, book_cpumask); static BIN_ATTR_RO(book_siblings, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(book_siblings_list, CPULIST_FILE_MAX_BYTES); #endif #ifdef TOPOLOGY_DRAWER_SYSFS define_id_show_func(drawer_id, "%d"); static DEVICE_ATTR_RO(drawer_id); define_siblings_read_func(drawer_siblings, drawer_cpumask); static BIN_ATTR_RO(drawer_siblings, CPUMAP_FILE_MAX_BYTES); static BIN_ATTR_RO(drawer_siblings_list, CPULIST_FILE_MAX_BYTES); #endif static struct bin_attribute *bin_attrs[] = { &bin_attr_core_cpus, &bin_attr_core_cpus_list, &bin_attr_thread_siblings, &bin_attr_thread_siblings_list, &bin_attr_core_siblings, &bin_attr_core_siblings_list, #ifdef TOPOLOGY_CLUSTER_SYSFS &bin_attr_cluster_cpus, &bin_attr_cluster_cpus_list, #endif #ifdef TOPOLOGY_DIE_SYSFS &bin_attr_die_cpus, &bin_attr_die_cpus_list, #endif &bin_attr_package_cpus, &bin_attr_package_cpus_list, #ifdef TOPOLOGY_BOOK_SYSFS &bin_attr_book_siblings, &bin_attr_book_siblings_list, #endif #ifdef TOPOLOGY_DRAWER_SYSFS &bin_attr_drawer_siblings, &bin_attr_drawer_siblings_list, #endif NULL }; static struct attribute *default_attrs[] = { &dev_attr_physical_package_id.attr, #ifdef TOPOLOGY_DIE_SYSFS &dev_attr_die_id.attr, #endif #ifdef TOPOLOGY_CLUSTER_SYSFS &dev_attr_cluster_id.attr, #endif &dev_attr_core_id.attr, #ifdef TOPOLOGY_BOOK_SYSFS &dev_attr_book_id.attr, #endif #ifdef TOPOLOGY_DRAWER_SYSFS &dev_attr_drawer_id.attr, #endif &dev_attr_ppin.attr, NULL }; static umode_t topology_is_visible(struct kobject *kobj, struct attribute *attr, int unused) { if (attr == &dev_attr_ppin.attr && !topology_ppin(kobj_to_dev(kobj)->id)) return 0; return attr->mode; } static const struct attribute_group topology_attr_group = { .attrs = default_attrs, .bin_attrs = bin_attrs, .is_visible = topology_is_visible, .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); |