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