]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
835c34a1 | 2 | * Populate sysfs with topology information |
1da177e4 LT |
3 | * |
4 | * Written by: Matthew Dobson, IBM Corporation | |
5 | * Original Code: Paul Dorwin, IBM Corporation, Patrick Mochel, OSDL | |
6 | * | |
7 | * Copyright (C) 2002, IBM Corp. | |
8 | * | |
9c869eda | 9 | * All rights reserved. |
1da177e4 LT |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
19 | * NON INFRINGEMENT. See the GNU General Public License for more | |
20 | * details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * Send feedback to <colpatch@us.ibm.com> | |
27 | */ | |
28 | #include <linux/init.h> | |
29 | #include <linux/smp.h> | |
30 | #include <linux/nodemask.h> | |
aada06c9 | 31 | #include <linux/mmzone.h> |
1da177e4 LT |
32 | #include <asm/cpu.h> |
33 | ||
30964d54 | 34 | static DEFINE_PER_CPU(struct x86_cpu, cpu_devices); |
1da177e4 | 35 | |
3eaf5efa SR |
36 | #ifdef CONFIG_HOTPLUG_CPU |
37 | int arch_register_cpu(int num) | |
76b67ed9 | 38 | { |
bdaff4a3 AR |
39 | /* |
40 | * CPU0 cannot be offlined due to several | |
41 | * restrictions and assumptions in kernel. This basically | |
42 | * doesnt add a control file, one cannot attempt to offline | |
43 | * BSP. | |
fd6d7d26 SS |
44 | * |
45 | * Also certain PCI quirks require not to enable hotplug control | |
46 | * for all CPU's. | |
bdaff4a3 | 47 | */ |
a850cef7 | 48 | if (num) |
30964d54 | 49 | per_cpu(cpu_devices, num).cpu.hotpluggable = 1; |
30964d54 | 50 | return register_cpu(&per_cpu(cpu_devices, num).cpu, num); |
1da177e4 | 51 | } |
3eaf5efa | 52 | EXPORT_SYMBOL(arch_register_cpu); |
1da177e4 | 53 | |
da54becc AM |
54 | void arch_unregister_cpu(int num) |
55 | { | |
9583d050 | 56 | unregister_cpu(&per_cpu(cpu_devices, num).cpu); |
1da177e4 | 57 | } |
1da177e4 | 58 | EXPORT_SYMBOL(arch_unregister_cpu); |
3eaf5efa | 59 | #else |
d9874026 | 60 | static int __init arch_register_cpu(int num) |
3eaf5efa SR |
61 | { |
62 | return register_cpu(&per_cpu(cpu_devices, num).cpu, num); | |
63 | } | |
1da177e4 LT |
64 | #endif /*CONFIG_HOTPLUG_CPU*/ |
65 | ||
1da177e4 LT |
66 | static int __init topology_init(void) |
67 | { | |
68 | int i; | |
69 | ||
aada06c9 | 70 | #ifdef CONFIG_NUMA |
76e4f660 | 71 | for_each_online_node(i) |
0fc44159 | 72 | register_one_node(i); |
aada06c9 | 73 | #endif /* CONFIG_NUMA */ |
76e4f660 | 74 | |
a888cebe | 75 | for_each_present_cpu(i) |
76e4f660 | 76 | arch_register_cpu(i); |
1da177e4 LT |
77 | return 0; |
78 | } | |
79 | ||
1da177e4 | 80 | subsys_initcall(topology_init); |