896f0c0e8e
This enables SCHED_MC support for SH-X3 multi-cores. Presently this is just a simple wrapper around the possible map, but this allows for tying in support for some of the more exotic NUMA clusters where we can actually do something with the topology. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/*
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* arch/sh/kernel/topology.c
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*
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* Copyright (C) 2007 Paul Mundt
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*
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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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#include <linux/cpu.h>
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <linux/percpu.h>
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#include <linux/node.h>
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#include <linux/nodemask.h>
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static DEFINE_PER_CPU(struct cpu, cpu_devices);
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cpumask_t cpu_core_map[NR_CPUS];
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static cpumask_t cpu_coregroup_map(unsigned int cpu)
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{
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/*
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* Presently all SH-X3 SMP cores are multi-cores, so just keep it
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* simple until we have a method for determining topology..
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*/
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return cpu_possible_map;
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}
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const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
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{
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return &cpu_core_map[cpu];
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}
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int arch_update_cpu_topology(void)
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{
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unsigned int cpu;
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for_each_possible_cpu(cpu)
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cpu_core_map[cpu] = cpu_coregroup_map(cpu);
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return 0;
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}
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static int __init topology_init(void)
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{
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int i, ret;
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#ifdef CONFIG_NEED_MULTIPLE_NODES
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for_each_online_node(i)
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register_one_node(i);
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#endif
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for_each_present_cpu(i) {
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ret = register_cpu(&per_cpu(cpu_devices, i), i);
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if (unlikely(ret))
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printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
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__func__, i, ret);
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}
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#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
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/*
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* In the UP case, make sure the CPU association is still
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* registered under each node. Without this, sysfs fails
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* to make the connection between nodes other than node0
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* and cpu0.
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*/
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for_each_online_node(i)
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if (i != numa_node_id())
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register_cpu_under_node(raw_smp_processor_id(), i);
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#endif
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return 0;
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}
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subsys_initcall(topology_init);
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