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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 | // 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 sprintf(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(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_siblings, core_cpumask); static DEVICE_ATTR_RO(core_siblings); static DEVICE_ATTR_RO(core_siblings_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_core_id.attr, &dev_attr_thread_siblings.attr, &dev_attr_thread_siblings_list.attr, &dev_attr_core_siblings.attr, &dev_attr_core_siblings_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 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); |