// SPDX-License-Identifier: GPL-2.0
/*
* arch / sh / kernel / topology . c
*
* Copyright ( C ) 2007 Paul Mundt
*/
#include <linux/cpu.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/topology.h>
#include <linux/node.h>
#include <linux/nodemask.h>
#include <linux/export.h>
static DEFINE_PER_CPU(struct cpu, cpu_devices);
cpumask_t cpu_core_map[NR_CPUS];
EXPORT_SYMBOL(cpu_core_map);
static cpumask_t cpu_coregroup_map(int cpu)
{
/*
* Presently all SH - X3 SMP cores are multi - cores , so just keep it
* simple until we have a method for determining topology . .
*/
return *cpu_possible_mask;
}
const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_core_map[cpu];
}
int arch_update_cpu_topology(void )
{
unsigned int cpu;
for_each_possible_cpu(cpu)
cpu_core_map[cpu] = cpu_coregroup_map(cpu);
return 0 ;
}
static int __init topology_init(void )
{
int i, ret;
for_each_present_cpu(i) {
struct cpu *c = &per_cpu(cpu_devices, i);
c->hotpluggable = 1 ;
ret = register_cpu(c, i);
if (unlikely(ret))
printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n" ,
__func__, i, ret);
}
#if defined (CONFIG_NUMA) && !defined (CONFIG_SMP)
/*
* In the UP case , make sure the CPU association is still
* registered under each node . Without this , sysfs fails
* to make the connection between nodes other than node0
* and cpu0 .
*/
for_each_online_node(i)
if (i != numa_node_id())
register_cpu_under_node(raw_smp_processor_id(), i);
#endif
return 0 ;
}
subsys_initcall(topology_init);
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