blob: 2d2a7509b565ac8835087518fc92221a315daeb2 [file] [log] [blame]
// 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];
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;
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.
if (i != numa_node_id())
register_cpu_under_node(raw_smp_processor_id(), i);
return 0;