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()
100 	device_unregister(&cpu->dev);  in unregister_cpu()
107 			       struct device_attribute *attr,  in cpu_probe_store()  argument
111 	ssize_t cnt;  in cpu_probe_store()  local
118 	cnt = arch_cpu_probe(buf, count);  in cpu_probe_store()
121 	return cnt;  in cpu_probe_store()
125 				 struct device_attribute *attr,  in cpu_release_store()  argument
129 	ssize_t cnt;  in cpu_release_store()  local
136 	cnt = arch_cpu_release(buf, count);  in cpu_release_store()
139 	return cnt;  in cpu_release_store()
151 				struct device_attribute *attr,  in crash_notes_show()  argument
158 	cpunum = cpu->dev.id;  in crash_notes_show()
173 				     struct device_attribute *attr,  in crash_notes_size_show()  argument
181 	&dev_attr_crash_notes.attr,
182 	&dev_attr_crash_notes_size.attr,
210 	struct device_attribute attr;  member
215 			      struct device_attribute *attr,  in show_cpus_attr()  argument
218 	struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);  in show_cpus_attr()
220 	return cpumap_print_to_pagebuf(true, buf, ca->map);  in show_cpus_attr()
223 #define _CPU_ATTR(name, map) \  argument
224 	{ __ATTR(name, 0444, show_cpus_attr, NULL), map }
237 				     struct device_attribute *attr, char *buf)  in print_cpus_kernel_max()  argument
239 	return sysfs_emit(buf, "%d\n", NR_CPUS - 1);  in print_cpus_kernel_max()
243 /* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
247 				  struct device_attribute *attr, char *buf)  in print_cpus_offline()  argument
254 		return -ENOMEM;  in print_cpus_offline()
263 		if (nr_cpu_ids == total_cpus-1)  in print_cpus_offline()
266 			len += sysfs_emit_at(buf, len, "%u-%d",  in print_cpus_offline()
267 					     nr_cpu_ids, total_cpus - 1);  in print_cpus_offline()
277 				  struct device_attribute *attr, char *buf)  in print_cpus_isolated()  argument
283 		return -ENOMEM;  in print_cpus_isolated()
297 				    struct device_attribute *attr, char *buf)  in print_cpus_nohz_full()  argument
306 				     struct device_attribute *attr,  in crash_hotplug_show()  argument
329 	 * on the linux-kernel list, you have been warned.  in cpu_device_release()
335 				  struct device_attribute *attr,  in print_cpu_modalias()  argument
370 	.name = "cpu",
384  * register_cpu - Setup a sysfs device for a CPU.
385  * @cpu - cpu->hotpluggable field set to 1 will generate a control file in
387  * @num - CPU number to use when creating the device.
395 	cpu->node_id = cpu_to_node(num);  in register_cpu()
396 	memset(&cpu->dev, 0x00, sizeof(struct device));  in register_cpu()
397 	cpu->dev.id = num;  in register_cpu()
398 	cpu->dev.bus = &cpu_subsys;  in register_cpu()
399 	cpu->dev.release = cpu_device_release;  in register_cpu()
400 	cpu->dev.offline_disabled = !cpu->hotpluggable;  in register_cpu()
401 	cpu->dev.offline = !cpu_online(num);  in register_cpu()
402 	cpu->dev.of_node = of_get_cpu_node(num, NULL);  in register_cpu()
403 	cpu->dev.groups = common_cpu_attr_groups;  in register_cpu()
404 	if (cpu->hotpluggable)  in register_cpu()
405 		cpu->dev.groups = hotplugable_cpu_attr_groups;  in register_cpu()
406 	error = device_register(&cpu->dev);  in register_cpu()
408 		put_device(&cpu->dev);  in register_cpu()
412 	per_cpu(cpu_sys_devices, num) = &cpu->dev;  in register_cpu()
414 	dev_pm_qos_expose_latency_limit(&cpu->dev,  in register_cpu()
441 	int retval = -ENOMEM;  in __cpu_device_create()
448 	dev->parent = parent;  in __cpu_device_create()
449 	dev->groups = groups;  in __cpu_device_create()
450 	dev->release = device_create_release;  in __cpu_device_create()
454 	retval = kobject_set_name_vargs(&dev->kobj, fmt, args);  in __cpu_device_create()
489 	&dev_attr_probe.attr,
490 	&dev_attr_release.attr,
492 	&cpu_attrs[0].attr.attr,
493 	&cpu_attrs[1].attr.attr,
494 	&cpu_attrs[2].attr.attr,
495 	&dev_attr_kernel_max.attr,
496 	&dev_attr_offline.attr,
497 	&dev_attr_isolated.attr,
499 	&dev_attr_nohz_full.attr,
502 	&dev_attr_crash_hotplug.attr,
505 	&dev_attr_modalias.attr,
522 	return dev && container_of(dev, struct cpu, dev)->hotpluggable  in cpu_is_hotpluggable()
545 			      struct device_attribute *attr, char *buf)  in cpu_show_not_affected()  argument
586 	&dev_attr_meltdown.attr,
587 	&dev_attr_spectre_v1.attr,
588 	&dev_attr_spectre_v2.attr,
589 	&dev_attr_spec_store_bypass.attr,
590 	&dev_attr_l1tf.attr,
591 	&dev_attr_mds.attr,
592 	&dev_attr_tsx_async_abort.attr,
593 	&dev_attr_itlb_multihit.attr,
594 	&dev_attr_srbds.attr,
595 	&dev_attr_mmio_stale_data.attr,
596 	&dev_attr_retbleed.attr,
597 	&dev_attr_spec_rstack_overflow.attr,
598 	&dev_attr_gather_data_sampling.attr,
599 	&dev_attr_reg_file_data_sampling.attr,
604 	.name  = "vulnerabilities",
613 		if (sysfs_create_group(&dev->kobj, &cpu_root_vulnerabilities_group))  in cpu_register_vulnerabilities()