Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * driver/base/topology.c - Populate sysfs with cpu topology information |
| 3 | * |
| 4 | * Written by: Zhang Yanmin, Intel Corporation |
| 5 | * |
| 6 | * Copyright (C) 2006, Intel Corp. |
| 7 | * |
| 8 | * All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 18 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 19 | * details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | * |
| 25 | */ |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 26 | #include <linux/mm.h> |
| 27 | #include <linux/cpu.h> |
| 28 | #include <linux/module.h> |
David Miller | b13d372 | 2009-01-07 15:30:05 -0800 | [diff] [blame] | 29 | #include <linux/hardirq.h> |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 30 | #include <linux/topology.h> |
| 31 | |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 32 | #define define_id_show_func(name) \ |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 33 | static ssize_t name##_show(struct device *dev, \ |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 34 | struct device_attribute *attr, char *buf) \ |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 35 | { \ |
Vincent Stehlé | 53974e0 | 2014-04-04 08:43:18 +0200 | [diff] [blame] | 36 | return sprintf(buf, "%d\n", topology_##name(dev->id)); \ |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 37 | } |
| 38 | |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 39 | #define define_siblings_show_map(name, mask) \ |
| 40 | static ssize_t name##_show(struct device *dev, \ |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 41 | struct device_attribute *attr, char *buf) \ |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 42 | { \ |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 43 | return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\ |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 44 | } |
| 45 | |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 46 | #define define_siblings_show_list(name, mask) \ |
| 47 | static ssize_t name##_list_show(struct device *dev, \ |
| 48 | struct device_attribute *attr, \ |
| 49 | char *buf) \ |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 50 | { \ |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 51 | return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\ |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 52 | } |
Mike Travis | 23ca4bb | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 53 | |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 54 | #define define_siblings_show_func(name, mask) \ |
| 55 | define_siblings_show_map(name, mask); \ |
| 56 | define_siblings_show_list(name, mask) |
Mike Travis | 39106dc | 2008-04-08 11:43:03 -0700 | [diff] [blame] | 57 | |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 58 | define_id_show_func(physical_package_id); |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 59 | static DEVICE_ATTR_RO(physical_package_id); |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 60 | |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 61 | define_id_show_func(core_id); |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 62 | static DEVICE_ATTR_RO(core_id); |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 63 | |
Bartosz Golaszewski | 06931e6 | 2015-05-26 15:11:28 +0200 | [diff] [blame] | 64 | define_siblings_show_func(thread_siblings, sibling_cpumask); |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 65 | static DEVICE_ATTR_RO(thread_siblings); |
| 66 | static DEVICE_ATTR_RO(thread_siblings_list); |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 67 | |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 68 | define_siblings_show_func(core_siblings, core_cpumask); |
| 69 | static DEVICE_ATTR_RO(core_siblings); |
| 70 | static DEVICE_ATTR_RO(core_siblings_list); |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 71 | |
Heiko Carstens | b40d8ed | 2010-08-31 10:28:17 +0200 | [diff] [blame] | 72 | #ifdef CONFIG_SCHED_BOOK |
| 73 | define_id_show_func(book_id); |
Sudeep Holla | d6ea8d0 | 2014-09-30 14:48:23 +0100 | [diff] [blame] | 74 | static DEVICE_ATTR_RO(book_id); |
| 75 | define_siblings_show_func(book_siblings, book_cpumask); |
| 76 | static DEVICE_ATTR_RO(book_siblings); |
| 77 | static DEVICE_ATTR_RO(book_siblings_list); |
Heiko Carstens | b40d8ed | 2010-08-31 10:28:17 +0200 | [diff] [blame] | 78 | #endif |
| 79 | |
Heiko Carstens | a62247e | 2016-05-21 11:10:13 +0200 | [diff] [blame] | 80 | #ifdef CONFIG_SCHED_DRAWER |
| 81 | define_id_show_func(drawer_id); |
| 82 | static DEVICE_ATTR_RO(drawer_id); |
| 83 | define_siblings_show_func(drawer_siblings, drawer_cpumask); |
| 84 | static DEVICE_ATTR_RO(drawer_siblings); |
| 85 | static DEVICE_ATTR_RO(drawer_siblings_list); |
| 86 | #endif |
| 87 | |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 88 | static struct attribute *default_attrs[] = { |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 89 | &dev_attr_physical_package_id.attr, |
| 90 | &dev_attr_core_id.attr, |
| 91 | &dev_attr_thread_siblings.attr, |
| 92 | &dev_attr_thread_siblings_list.attr, |
| 93 | &dev_attr_core_siblings.attr, |
| 94 | &dev_attr_core_siblings_list.attr, |
Heiko Carstens | b40d8ed | 2010-08-31 10:28:17 +0200 | [diff] [blame] | 95 | #ifdef CONFIG_SCHED_BOOK |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 96 | &dev_attr_book_id.attr, |
| 97 | &dev_attr_book_siblings.attr, |
| 98 | &dev_attr_book_siblings_list.attr, |
Heiko Carstens | b40d8ed | 2010-08-31 10:28:17 +0200 | [diff] [blame] | 99 | #endif |
Heiko Carstens | a62247e | 2016-05-21 11:10:13 +0200 | [diff] [blame] | 100 | #ifdef CONFIG_SCHED_DRAWER |
| 101 | &dev_attr_drawer_id.attr, |
| 102 | &dev_attr_drawer_siblings.attr, |
| 103 | &dev_attr_drawer_siblings_list.attr, |
| 104 | #endif |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 105 | NULL |
| 106 | }; |
| 107 | |
Arvind Yadav | df44d30 | 2017-08-02 19:36:20 +0530 | [diff] [blame] | 108 | static const struct attribute_group topology_attr_group = { |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 109 | .attrs = default_attrs, |
| 110 | .name = "topology" |
| 111 | }; |
| 112 | |
| 113 | /* Add/Remove cpu_topology interface for CPU device */ |
Paul Gortmaker | a83048e | 2013-06-19 15:22:41 -0400 | [diff] [blame] | 114 | static int topology_add_dev(unsigned int cpu) |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 115 | { |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 116 | struct device *dev = get_cpu_device(cpu); |
Heiko Carstens | 06a4bca | 2006-11-08 19:46:09 -0800 | [diff] [blame] | 117 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 118 | return sysfs_create_group(&dev->kobj, &topology_attr_group); |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 119 | } |
| 120 | |
Sebastian Andrzej Siewior | 38643a0 | 2016-11-03 15:50:09 +0100 | [diff] [blame] | 121 | static int topology_remove_dev(unsigned int cpu) |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 122 | { |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 123 | struct device *dev = get_cpu_device(cpu); |
Heiko Carstens | 06a4bca | 2006-11-08 19:46:09 -0800 | [diff] [blame] | 124 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 125 | sysfs_remove_group(&dev->kobj, &topology_attr_group); |
Sebastian Andrzej Siewior | 38643a0 | 2016-11-03 15:50:09 +0100 | [diff] [blame] | 126 | return 0; |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 127 | } |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 128 | |
Paul Gortmaker | a83048e | 2013-06-19 15:22:41 -0400 | [diff] [blame] | 129 | static int topology_sysfs_init(void) |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 130 | { |
Sebastian Andrzej Siewior | 38643a0 | 2016-11-03 15:50:09 +0100 | [diff] [blame] | 131 | return cpuhp_setup_state(CPUHP_TOPOLOGY_PREPARE, |
| 132 | "base/topology:prepare", topology_add_dev, |
| 133 | topology_remove_dev); |
Zhang, Yanmin | 69dcc99 | 2006-02-03 03:04:36 -0800 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | device_initcall(topology_sysfs_init); |