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5933f6d2 | 1 | // SPDX-License-Identifier: GPL-2.0 |
05a11784 PM |
2 | /* |
3 | * arch/sh/kernel/topology.c | |
4 | * | |
5 | * Copyright (C) 2007 Paul Mundt | |
05a11784 | 6 | */ |
7a302a96 PM |
7 | #include <linux/cpu.h> |
8 | #include <linux/cpumask.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/percpu.h> | |
6988d647 | 11 | #include <linux/topology.h> |
d22d9b3a PM |
12 | #include <linux/node.h> |
13 | #include <linux/nodemask.h> | |
f7be3455 | 14 | #include <linux/export.h> |
7a302a96 PM |
15 | |
16 | static DEFINE_PER_CPU(struct cpu, cpu_devices); | |
17 | ||
896f0c0e | 18 | cpumask_t cpu_core_map[NR_CPUS]; |
24ee7d79 | 19 | EXPORT_SYMBOL(cpu_core_map); |
896f0c0e | 20 | |
ccc7d5a1 | 21 | static cpumask_t cpu_coregroup_map(int cpu) |
896f0c0e PM |
22 | { |
23 | /* | |
24 | * Presently all SH-X3 SMP cores are multi-cores, so just keep it | |
25 | * simple until we have a method for determining topology.. | |
26 | */ | |
004f4ce9 | 27 | return *cpu_possible_mask; |
896f0c0e PM |
28 | } |
29 | ||
ccc7d5a1 | 30 | const struct cpumask *cpu_coregroup_mask(int cpu) |
896f0c0e PM |
31 | { |
32 | return &cpu_core_map[cpu]; | |
33 | } | |
34 | ||
35 | int arch_update_cpu_topology(void) | |
36 | { | |
37 | unsigned int cpu; | |
38 | ||
39 | for_each_possible_cpu(cpu) | |
40 | cpu_core_map[cpu] = cpu_coregroup_map(cpu); | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
7a302a96 PM |
45 | static int __init topology_init(void) |
46 | { | |
47 | int i, ret; | |
48 | ||
49 | for_each_present_cpu(i) { | |
9e8c5be8 PM |
50 | struct cpu *c = &per_cpu(cpu_devices, i); |
51 | ||
52 | c->hotpluggable = 1; | |
53 | ||
54 | ret = register_cpu(c, i); | |
7a302a96 PM |
55 | if (unlikely(ret)) |
56 | printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n", | |
866e6b9e | 57 | __func__, i, ret); |
7a302a96 PM |
58 | } |
59 | ||
05a11784 PM |
60 | #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP) |
61 | /* | |
62 | * In the UP case, make sure the CPU association is still | |
63 | * registered under each node. Without this, sysfs fails | |
64 | * to make the connection between nodes other than node0 | |
65 | * and cpu0. | |
66 | */ | |
67 | for_each_online_node(i) | |
68 | if (i != numa_node_id()) | |
69 | register_cpu_under_node(raw_smp_processor_id(), i); | |
70 | #endif | |
71 | ||
7a302a96 PM |
72 | return 0; |
73 | } | |
74 | subsys_initcall(topology_init); |