Lines Matching refs:cpu
10 #include <asm/cpu.h>
12 static void enable_hotplug_cpu(int cpu)
14 if (!cpu_present(cpu))
15 xen_arch_register_cpu(cpu);
17 set_cpu_present(cpu, true);
20 static void disable_hotplug_cpu(int cpu)
22 if (!cpu_is_hotpluggable(cpu))
25 if (cpu_online(cpu))
26 device_offline(get_cpu_device(cpu));
27 if (!cpu_online(cpu) && cpu_present(cpu)) {
28 xen_arch_unregister_cpu(cpu);
29 set_cpu_present(cpu, false);
34 static int vcpu_online(unsigned int cpu)
39 sprintf(dir, "cpu/%u", cpu);
43 pr_err("Unable to read cpu state\n");
52 pr_err("unknown state(%s) on CPU%d\n", state, cpu);
55 static void vcpu_hotplug(unsigned int cpu)
57 if (cpu >= nr_cpu_ids || !cpu_possible(cpu))
60 switch (vcpu_online(cpu)) {
62 enable_hotplug_cpu(cpu);
65 disable_hotplug_cpu(cpu);
75 unsigned int cpu;
78 cpustr = strstr(path, "cpu/");
80 sscanf(cpustr, "cpu/%u", &cpu);
81 vcpu_hotplug(cpu);
88 int cpu;
90 .node = "cpu",
95 for_each_possible_cpu(cpu) {
96 if (vcpu_online(cpu) == 0)
97 disable_hotplug_cpu(cpu);