diff options
Diffstat (limited to 'arch/loongarch/kernel/topology.c')
| -rw-r--r-- | arch/loongarch/kernel/topology.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/arch/loongarch/kernel/topology.c b/arch/loongarch/kernel/topology.c index 3b2cbb95875b..ab1a75c0b5a6 100644 --- a/arch/loongarch/kernel/topology.c +++ b/arch/loongarch/kernel/topology.c @@ -1,13 +1,52 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/cpu.h> +#include <linux/cpumask.h> #include <linux/init.h> +#include <linux/node.h> +#include <linux/nodemask.h> #include <linux/percpu.h> -static struct cpu cpu_device; +static DEFINE_PER_CPU(struct cpu, cpu_devices); + +#ifdef CONFIG_HOTPLUG_CPU +int arch_register_cpu(int cpu) +{ + int ret; + struct cpu *c = &per_cpu(cpu_devices, cpu); + + c->hotpluggable = 1; + ret = register_cpu(c, cpu); + if (ret < 0) + pr_warn("register_cpu %d failed (%d)\n", cpu, ret); + + return ret; +} +EXPORT_SYMBOL(arch_register_cpu); + +void arch_unregister_cpu(int cpu) +{ + struct cpu *c = &per_cpu(cpu_devices, cpu); + + c->hotpluggable = 0; + unregister_cpu(c); +} +EXPORT_SYMBOL(arch_unregister_cpu); +#endif static int __init topology_init(void) { - return register_cpu(&cpu_device, 0); + int i, ret; + + for_each_present_cpu(i) { + struct cpu *c = &per_cpu(cpu_devices, i); + + c->hotpluggable = !!i; + ret = register_cpu(c, i); + if (ret < 0) + pr_warn("topology_init: register_cpu %d failed (%d)\n", i, ret); + } + + return 0; } subsys_initcall(topology_init); |