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74 lines
1.5 KiB
74 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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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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#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/topology.h> |
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#include <linux/node.h> |
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#include <linux/nodemask.h> |
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#include <linux/export.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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EXPORT_SYMBOL(cpu_core_map); |
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static cpumask_t cpu_coregroup_map(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_mask; |
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} |
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const struct cpumask *cpu_coregroup_mask(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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for_each_present_cpu(i) { |
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struct cpu *c = &per_cpu(cpu_devices, i); |
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c->hotpluggable = 1; |
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ret = register_cpu(c, 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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