1 // SPDX-License-Identifier: GPL-2.0
42 	int cpuid = cpu->dev.id;  in change_cpu_under_node()
45 	cpu->node_id = to_nid;  in change_cpu_under_node()
51 	int cpuid = dev->id;  in cpu_subsys_online()
58 		return -ENODEV;  in cpu_subsys_online()
64 	 * If -EBUSY is returned, it is likely that hotplug is temporarily  in cpu_subsys_online()
70 	if (ret == -EBUSY) {  in cpu_subsys_online()
96 	int logical_cpu = cpu->dev.id;  in unregister_cpu()
101 	device_unregister(&cpu->dev);  in unregister_cpu()
108 			       struct device_attribute *attr,  in cpu_probe_store()  argument
112 	ssize_t cnt;  in cpu_probe_store()  local
119 	cnt = arch_cpu_probe(buf, count);  in cpu_probe_store()
122 	return cnt;  in cpu_probe_store()
126 				 struct device_attribute *attr,  in cpu_release_store()  argument
130 	ssize_t cnt;  in cpu_release_store()  local
137 	cnt = arch_cpu_release(buf, count);  in cpu_release_store()
140 	return cnt;  in cpu_release_store()
152 				struct device_attribute *attr,  in crash_notes_show()  argument
159 	cpunum = cpu->dev.id;  in crash_notes_show()
174 				     struct device_attribute *attr,  in crash_notes_size_show()  argument
182 	&dev_attr_crash_notes.attr,
183 	&dev_attr_crash_notes_size.attr,
211 	struct device_attribute attr;  member
216 			      struct device_attribute *attr,  in show_cpus_attr()  argument
219 	struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);  in show_cpus_attr()
221 	return cpumap_print_to_pagebuf(true, buf, ca->map);  in show_cpus_attr()
224 #define _CPU_ATTR(name, map) \  argument
225 	{ __ATTR(name, 0444, show_cpus_attr, NULL), map }
238 				     struct device_attribute *attr, char *buf)  in print_cpus_kernel_max()  argument
240 	return sysfs_emit(buf, "%d\n", NR_CPUS - 1);  in print_cpus_kernel_max()
244 /* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
248 				  struct device_attribute *attr, char *buf)  in print_cpus_offline()  argument
255 		return -ENOMEM;  in print_cpus_offline()
264 		if (nr_cpu_ids == total_cpus-1)  in print_cpus_offline()
267 			len += sysfs_emit_at(buf, len, "%u-%d",  in print_cpus_offline()
268 					     nr_cpu_ids, total_cpus - 1);  in print_cpus_offline()
278 				  struct device_attribute *attr, char *buf)  in print_cpus_enabled()  argument
285 				  struct device_attribute *attr, char *buf)  in print_cpus_isolated()  argument
291 		return -ENOMEM;  in print_cpus_isolated()
305 				    struct device_attribute *attr, char *buf)  in print_cpus_nohz_full()  argument
314 				     struct device_attribute *attr,  in crash_hotplug_show()  argument
337 	 * on the linux-kernel list, you have been warned.  in cpu_device_release()
343 				  struct device_attribute *attr,  in print_cpu_modalias()  argument
378 	.name = "cpu",
392  * register_cpu - Setup a sysfs device for a CPU.
393  * @cpu - cpu->hotpluggable field set to 1 will generate a control file in
395  * @num - CPU number to use when creating the device.
403 	cpu->node_id = cpu_to_node(num);  in register_cpu()
404 	memset(&cpu->dev, 0x00, sizeof(struct device));  in register_cpu()
405 	cpu->dev.id = num;  in register_cpu()
406 	cpu->dev.bus = &cpu_subsys;  in register_cpu()
407 	cpu->dev.release = cpu_device_release;  in register_cpu()
408 	cpu->dev.offline_disabled = !cpu->hotpluggable;  in register_cpu()
409 	cpu->dev.offline = !cpu_online(num);  in register_cpu()
410 	cpu->dev.of_node = of_get_cpu_node(num, NULL);  in register_cpu()
411 	cpu->dev.groups = common_cpu_attr_groups;  in register_cpu()
412 	if (cpu->hotpluggable)  in register_cpu()
413 		cpu->dev.groups = hotplugable_cpu_attr_groups;  in register_cpu()
414 	error = device_register(&cpu->dev);  in register_cpu()
416 		put_device(&cpu->dev);  in register_cpu()
420 	per_cpu(cpu_sys_devices, num) = &cpu->dev;  in register_cpu()
422 	dev_pm_qos_expose_latency_limit(&cpu->dev,  in register_cpu()
450 	int retval = -ENOMEM;  in __cpu_device_create()
457 	dev->parent = parent;  in __cpu_device_create()
458 	dev->groups = groups;  in __cpu_device_create()
459 	dev->release = device_create_release;  in __cpu_device_create()
463 	retval = kobject_set_name_vargs(&dev->kobj, fmt, args);  in __cpu_device_create()
498 	&dev_attr_probe.attr,
499 	&dev_attr_release.attr,
501 	&cpu_attrs[0].attr.attr,
502 	&cpu_attrs[1].attr.attr,
503 	&cpu_attrs[2].attr.attr,
504 	&dev_attr_kernel_max.attr,
505 	&dev_attr_offline.attr,
506 	&dev_attr_enabled.attr,
507 	&dev_attr_isolated.attr,
509 	&dev_attr_nohz_full.attr,
512 	&dev_attr_crash_hotplug.attr,
515 	&dev_attr_modalias.attr,
532 	return dev && container_of(dev, struct cpu, dev)->hotpluggable  in cpu_is_hotpluggable()
549 	c->hotpluggable = arch_cpu_is_hotpluggable(cpu);  in arch_register_cpu()
571 		if (ret && ret != -EPROBE_DEFER)  in cpu_dev_register_generic()
578 			      struct device_attribute *attr, char *buf)  in cpu_show_not_affected()  argument
619 	&dev_attr_meltdown.attr,
620 	&dev_attr_spectre_v1.attr,
621 	&dev_attr_spectre_v2.attr,
622 	&dev_attr_spec_store_bypass.attr,
623 	&dev_attr_l1tf.attr,
624 	&dev_attr_mds.attr,
625 	&dev_attr_tsx_async_abort.attr,
626 	&dev_attr_itlb_multihit.attr,
627 	&dev_attr_srbds.attr,
628 	&dev_attr_mmio_stale_data.attr,
629 	&dev_attr_retbleed.attr,
630 	&dev_attr_spec_rstack_overflow.attr,
631 	&dev_attr_gather_data_sampling.attr,
632 	&dev_attr_reg_file_data_sampling.attr,
637 	.name  = "vulnerabilities",
646 		if (sysfs_create_group(&dev->kobj, &cpu_root_vulnerabilities_group))  in cpu_register_vulnerabilities()