Commit | Line | Data |
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989d42e8 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
69dcc991 ZY |
2 | /* |
3 | * driver/base/topology.c - Populate sysfs with cpu topology information | |
4 | * | |
5 | * Written by: Zhang Yanmin, Intel Corporation | |
6 | * | |
7 | * Copyright (C) 2006, Intel Corp. | |
8 | * | |
9 | * All rights reserved. | |
69dcc991 | 10 | */ |
69dcc991 ZY |
11 | #include <linux/mm.h> |
12 | #include <linux/cpu.h> | |
13 | #include <linux/module.h> | |
b13d3720 | 14 | #include <linux/hardirq.h> |
69dcc991 ZY |
15 | #include <linux/topology.h> |
16 | ||
69dcc991 | 17 | #define define_id_show_func(name) \ |
d6ea8d01 | 18 | static ssize_t name##_show(struct device *dev, \ |
8a25a2fd | 19 | struct device_attribute *attr, char *buf) \ |
69dcc991 | 20 | { \ |
53974e06 | 21 | return sprintf(buf, "%d\n", topology_##name(dev->id)); \ |
69dcc991 ZY |
22 | } |
23 | ||
d6ea8d01 SH |
24 | #define define_siblings_show_map(name, mask) \ |
25 | static ssize_t name##_show(struct device *dev, \ | |
8a25a2fd | 26 | struct device_attribute *attr, char *buf) \ |
23ca4bba | 27 | { \ |
d6ea8d01 | 28 | return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\ |
23ca4bba MT |
29 | } |
30 | ||
d6ea8d01 SH |
31 | #define define_siblings_show_list(name, mask) \ |
32 | static ssize_t name##_list_show(struct device *dev, \ | |
33 | struct device_attribute *attr, \ | |
34 | char *buf) \ | |
23ca4bba | 35 | { \ |
d6ea8d01 | 36 | return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\ |
23ca4bba | 37 | } |
23ca4bba | 38 | |
d6ea8d01 SH |
39 | #define define_siblings_show_func(name, mask) \ |
40 | define_siblings_show_map(name, mask); \ | |
41 | define_siblings_show_list(name, mask) | |
39106dcf | 42 | |
69dcc991 | 43 | define_id_show_func(physical_package_id); |
d6ea8d01 | 44 | static DEVICE_ATTR_RO(physical_package_id); |
69dcc991 | 45 | |
69dcc991 | 46 | define_id_show_func(core_id); |
d6ea8d01 | 47 | static DEVICE_ATTR_RO(core_id); |
69dcc991 | 48 | |
06931e62 | 49 | define_siblings_show_func(thread_siblings, sibling_cpumask); |
d6ea8d01 SH |
50 | static DEVICE_ATTR_RO(thread_siblings); |
51 | static DEVICE_ATTR_RO(thread_siblings_list); | |
69dcc991 | 52 | |
d6ea8d01 SH |
53 | define_siblings_show_func(core_siblings, core_cpumask); |
54 | static DEVICE_ATTR_RO(core_siblings); | |
55 | static DEVICE_ATTR_RO(core_siblings_list); | |
69dcc991 | 56 | |
b40d8ed4 HC |
57 | #ifdef CONFIG_SCHED_BOOK |
58 | define_id_show_func(book_id); | |
d6ea8d01 SH |
59 | static DEVICE_ATTR_RO(book_id); |
60 | define_siblings_show_func(book_siblings, book_cpumask); | |
61 | static DEVICE_ATTR_RO(book_siblings); | |
62 | static DEVICE_ATTR_RO(book_siblings_list); | |
b40d8ed4 HC |
63 | #endif |
64 | ||
a62247e1 HC |
65 | #ifdef CONFIG_SCHED_DRAWER |
66 | define_id_show_func(drawer_id); | |
67 | static DEVICE_ATTR_RO(drawer_id); | |
68 | define_siblings_show_func(drawer_siblings, drawer_cpumask); | |
69 | static DEVICE_ATTR_RO(drawer_siblings); | |
70 | static DEVICE_ATTR_RO(drawer_siblings_list); | |
71 | #endif | |
72 | ||
69dcc991 | 73 | static struct attribute *default_attrs[] = { |
8a25a2fd KS |
74 | &dev_attr_physical_package_id.attr, |
75 | &dev_attr_core_id.attr, | |
76 | &dev_attr_thread_siblings.attr, | |
77 | &dev_attr_thread_siblings_list.attr, | |
78 | &dev_attr_core_siblings.attr, | |
79 | &dev_attr_core_siblings_list.attr, | |
b40d8ed4 | 80 | #ifdef CONFIG_SCHED_BOOK |
8a25a2fd KS |
81 | &dev_attr_book_id.attr, |
82 | &dev_attr_book_siblings.attr, | |
83 | &dev_attr_book_siblings_list.attr, | |
a62247e1 HC |
84 | #endif |
85 | #ifdef CONFIG_SCHED_DRAWER | |
86 | &dev_attr_drawer_id.attr, | |
87 | &dev_attr_drawer_siblings.attr, | |
88 | &dev_attr_drawer_siblings_list.attr, | |
b40d8ed4 | 89 | #endif |
69dcc991 ZY |
90 | NULL |
91 | }; | |
92 | ||
df44d30d | 93 | static const struct attribute_group topology_attr_group = { |
69dcc991 ZY |
94 | .attrs = default_attrs, |
95 | .name = "topology" | |
96 | }; | |
97 | ||
98 | /* Add/Remove cpu_topology interface for CPU device */ | |
a83048eb | 99 | static int topology_add_dev(unsigned int cpu) |
69dcc991 | 100 | { |
8a25a2fd | 101 | struct device *dev = get_cpu_device(cpu); |
06a4bcae | 102 | |
8a25a2fd | 103 | return sysfs_create_group(&dev->kobj, &topology_attr_group); |
69dcc991 ZY |
104 | } |
105 | ||
38643a0e | 106 | static int topology_remove_dev(unsigned int cpu) |
69dcc991 | 107 | { |
8a25a2fd | 108 | struct device *dev = get_cpu_device(cpu); |
06a4bcae | 109 | |
8a25a2fd | 110 | sysfs_remove_group(&dev->kobj, &topology_attr_group); |
38643a0e | 111 | return 0; |
69dcc991 | 112 | } |
69dcc991 | 113 | |
a83048eb | 114 | static int topology_sysfs_init(void) |
69dcc991 | 115 | { |
38643a0e SAS |
116 | return cpuhp_setup_state(CPUHP_TOPOLOGY_PREPARE, |
117 | "base/topology:prepare", topology_add_dev, | |
118 | topology_remove_dev); | |
69dcc991 ZY |
119 | } |
120 | ||
121 | device_initcall(topology_sysfs_init); |