James Hogan | 42682c6 | 2012-10-05 16:56:56 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Paul Mundt |
| 3 | * Copyright (C) 2010 Imagination Technolohies Ltd. |
| 4 | * |
| 5 | * This file is subject to the terms and conditions of the GNU General Public |
| 6 | * License. See the file "COPYING" in the main directory of this archive |
| 7 | * for more details. |
| 8 | */ |
| 9 | #include <linux/cpu.h> |
| 10 | #include <linux/cpumask.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/percpu.h> |
| 13 | #include <linux/node.h> |
| 14 | #include <linux/nodemask.h> |
| 15 | #include <linux/topology.h> |
| 16 | |
| 17 | #include <asm/cpu.h> |
| 18 | |
| 19 | DEFINE_PER_CPU(struct cpuinfo_metag, cpu_data); |
| 20 | |
| 21 | cpumask_t cpu_core_map[NR_CPUS]; |
Chen Gang | 40979d3 | 2013-12-19 16:03:40 +0800 | [diff] [blame] | 22 | EXPORT_SYMBOL(cpu_core_map); |
James Hogan | 42682c6 | 2012-10-05 16:56:56 +0100 | [diff] [blame] | 23 | |
| 24 | static cpumask_t cpu_coregroup_map(unsigned int cpu) |
| 25 | { |
| 26 | return *cpu_possible_mask; |
| 27 | } |
| 28 | |
| 29 | const struct cpumask *cpu_coregroup_mask(unsigned int cpu) |
| 30 | { |
| 31 | return &cpu_core_map[cpu]; |
| 32 | } |
| 33 | |
| 34 | int arch_update_cpu_topology(void) |
| 35 | { |
| 36 | unsigned int cpu; |
| 37 | |
| 38 | for_each_possible_cpu(cpu) |
| 39 | cpu_core_map[cpu] = cpu_coregroup_map(cpu); |
| 40 | |
| 41 | return 0; |
| 42 | } |
| 43 | |
| 44 | static int __init topology_init(void) |
| 45 | { |
| 46 | int i, ret; |
| 47 | |
| 48 | #ifdef CONFIG_NEED_MULTIPLE_NODES |
| 49 | for_each_online_node(i) |
| 50 | register_one_node(i); |
| 51 | #endif |
| 52 | |
| 53 | for_each_present_cpu(i) { |
| 54 | struct cpuinfo_metag *cpuinfo = &per_cpu(cpu_data, i); |
| 55 | #ifdef CONFIG_HOTPLUG_CPU |
| 56 | cpuinfo->cpu.hotpluggable = 1; |
| 57 | #endif |
| 58 | ret = register_cpu(&cpuinfo->cpu, i); |
| 59 | if (unlikely(ret)) |
| 60 | pr_warn("%s: register_cpu %d failed (%d)\n", |
| 61 | __func__, i, ret); |
| 62 | } |
| 63 | |
| 64 | #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP) |
| 65 | /* |
| 66 | * In the UP case, make sure the CPU association is still |
| 67 | * registered under each node. Without this, sysfs fails |
| 68 | * to make the connection between nodes other than node0 |
| 69 | * and cpu0. |
| 70 | */ |
| 71 | for_each_online_node(i) |
| 72 | if (i != numa_node_id()) |
| 73 | register_cpu_under_node(raw_smp_processor_id(), i); |
| 74 | #endif |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | subsys_initcall(topology_init); |