cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

topology.c (1005B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/cpu.h>
      3#include <linux/cpumask.h>
      4#include <linux/init.h>
      5#include <linux/node.h>
      6#include <linux/nodemask.h>
      7#include <linux/percpu.h>
      8
      9static DEFINE_PER_CPU(struct cpu, cpu_devices);
     10
     11#ifdef CONFIG_HOTPLUG_CPU
     12int arch_register_cpu(int cpu)
     13{
     14	int ret;
     15	struct cpu *c = &per_cpu(cpu_devices, cpu);
     16
     17	c->hotpluggable = 1;
     18	ret = register_cpu(c, cpu);
     19	if (ret < 0)
     20		pr_warn("register_cpu %d failed (%d)\n", cpu, ret);
     21
     22	return ret;
     23}
     24EXPORT_SYMBOL(arch_register_cpu);
     25
     26void arch_unregister_cpu(int cpu)
     27{
     28	struct cpu *c = &per_cpu(cpu_devices, cpu);
     29
     30	c->hotpluggable = 0;
     31	unregister_cpu(c);
     32}
     33EXPORT_SYMBOL(arch_unregister_cpu);
     34#endif
     35
     36static int __init topology_init(void)
     37{
     38	int i, ret;
     39
     40	for_each_present_cpu(i) {
     41		struct cpu *c = &per_cpu(cpu_devices, i);
     42
     43		c->hotpluggable = !!i;
     44		ret = register_cpu(c, i);
     45		if (ret < 0)
     46			pr_warn("topology_init: register_cpu %d failed (%d)\n", i, ret);
     47	}
     48
     49	return 0;
     50}
     51
     52subsys_initcall(topology_init);