blob: 3b6fd798c4d68c2a1cbbed752e875286b1d3ff85 (
plain) (
blame)
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
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* This file contains NUMA specific variables and functions which can
* be split away from DISCONTIGMEM and are used on NUMA machines with
* contiguous memory.
* 2002/08/07 Erich Focht <efocht@ess.nec.de>
* Populate cpu entries in sysfs for non-numa systems as well
* Intel Corporation - Ashok Raj
*/
#include <linux/config.h>
#include <linux/cpu.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/node.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/nodemask.h>
#include <asm/mmzone.h>
#include <asm/numa.h>
#include <asm/cpu.h>
#ifdef CONFIG_NUMA
static struct node *sysfs_nodes;
#endif
static struct ia64_cpu *sysfs_cpus;
int arch_register_cpu(int num)
{
struct node *parent = NULL;
#ifdef CONFIG_NUMA
parent = &sysfs_nodes[cpu_to_node(num)];
#endif /* CONFIG_NUMA */
#if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU)
/*
* If CPEI cannot be re-targetted, and this is
* CPEI target, then dont create the control file
*/
if (!can_cpei_retarget() && is_cpu_cpei_target(num))
sysfs_cpus[num].cpu.no_control = 1;
#endif
return register_cpu(&sysfs_cpus[num].cpu, num, parent);
}
#ifdef CONFIG_HOTPLUG_CPU
void arch_unregister_cpu(int num)
{
struct node *parent = NULL;
#ifdef CONFIG_NUMA
int node = cpu_to_node(num);
parent = &sysfs_nodes[node];
#endif /* CONFIG_NUMA */
return unregister_cpu(&sysfs_cpus[num].cpu, parent);
}
EXPORT_SYMBOL(arch_register_cpu);
EXPORT_SYMBOL(arch_unregister_cpu);
#endif /*CONFIG_HOTPLUG_CPU*/
static int __init topology_init(void)
{
int i, err = 0;
#ifdef CONFIG_NUMA
sysfs_nodes = kzalloc(sizeof(struct node) * MAX_NUMNODES, GFP_KERNEL);
if (!sysfs_nodes) {
err = -ENOMEM;
goto out;
}
/*
* MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes?
*/
for_each_online_node(i) {
if ((err = register_node(&sysfs_nodes[i], i, 0)))
goto out;
}
#endif
sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL);
if (!sysfs_cpus) {
err = -ENOMEM;
goto out;
}
for_each_present_cpu(i) {
if((err = arch_register_cpu(i)))
goto out;
}
out:
return err;
}
subsys_initcall(topology_init);
|
