1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar
12 #include <linux/interrupt.h>
22  * concurrent free of the interrupt descriptor. remove_proc_entry()
26  * We remove the proc entries first and then delete the interrupt
40 	AFFINITY,  enumerator
48 	struct irq_desc *desc = irq_to_desc((long)m->private);  in show_irq_affinity()
52 	case AFFINITY:  in show_irq_affinity()
54 		mask = desc->irq_common_data.affinity;  in show_irq_affinity()
55 		if (irq_move_pending(&desc->irq_data))  in show_irq_affinity()
61 		mask = irq_data_get_effective_affinity_mask(&desc->irq_data);  in show_irq_affinity()
65 		return -EINVAL;  in show_irq_affinity()
73 	case AFFINITY:  in show_irq_affinity()
83 	struct irq_desc *desc = irq_to_desc((long)m->private);  in irq_affinity_hint_proc_show()
88 		return -ENOMEM;  in irq_affinity_hint_proc_show()
90 	raw_spin_lock_irqsave(&desc->lock, flags);  in irq_affinity_hint_proc_show()
91 	if (desc->affinity_hint)  in irq_affinity_hint_proc_show()
92 		cpumask_copy(mask, desc->affinity_hint);  in irq_affinity_hint_proc_show()
93 	raw_spin_unlock_irqrestore(&desc->lock, flags);  in irq_affinity_hint_proc_show()
104 	return show_irq_affinity(AFFINITY, m);  in irq_affinity_proc_show()
116 	 * If the interrupt is started up already then this fails. The  in irq_select_affinity_usr()
117 	 * interrupt is assigned to an online CPU already. There is no  in irq_select_affinity_usr()
121 	 * If not then any change to the affinity is pointless because the  in irq_select_affinity_usr()
125 	return -EINVAL;  in irq_select_affinity_usr()
128 /* ALPHA magic affinity auto selector. Keep it for historical reasons. */
143 		return -EPERM;  in write_irq_affinity()
146 		return -ENOMEM;  in write_irq_affinity()
156 	 * Do not allow disabling IRQs completely - it's a too easy  in write_irq_affinity()
157 	 * way to make the system unusable accidentally :-) At least  in write_irq_affinity()
162 		 * Special case for empty set - allow the architecture code  in write_irq_affinity()
163 		 * to set default SMP affinity.  in write_irq_affinity()
165 		err = irq_select_affinity_usr(irq) ? -EINVAL : count;  in write_irq_affinity()
240 		return -ENOMEM;  in default_affinity_write()
247 	 * Do not allow disabling IRQs completely - it's a too easy  in default_affinity_write()
248 	 * way to make the system unusable accidentally :-) At least  in default_affinity_write()
252 		err = -EINVAL;  in default_affinity_write()
279 	struct irq_desc *desc = irq_to_desc((long) m->private);  in irq_node_proc_show()
288 	struct irq_desc *desc = irq_to_desc((long) m->private);  in irq_spurious_proc_show()
291 		   desc->irq_count, desc->irqs_unhandled,  in irq_spurious_proc_show()
292 		   jiffies_to_msecs(desc->last_unhandled));  in irq_spurious_proc_show()
305 	raw_spin_lock_irqsave(&desc->lock, flags);  in name_unique()
307 		if ((action != new_action) && action->name &&  in name_unique()
308 				!strcmp(new_action->name, action->name)) {  in name_unique()
313 	raw_spin_unlock_irqrestore(&desc->lock, flags);  in name_unique()
322 	if (!desc->dir || action->dir || !action->name ||  in register_handler_proc()
326 	snprintf(name, MAX_NAMELEN, "%s", action->name);  in register_handler_proc()
329 	action->dir = proc_mkdir(name, desc->dir);  in register_handler_proc()
342 	if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip))  in register_irq_proc()
352 	if (desc->dir)  in register_irq_proc()
358 	desc->dir = proc_mkdir(name, root_irq_dir);  in register_irq_proc()
359 	if (!desc->dir)  in register_irq_proc()
365 	if (irq_can_set_affinity_usr(desc->irq_data.irq))  in register_irq_proc()
369 	proc_create_data("smp_affinity", umode, desc->dir,  in register_irq_proc()
373 	proc_create_single_data("affinity_hint", 0444, desc->dir,  in register_irq_proc()
377 	proc_create_data("smp_affinity_list", umode, desc->dir,  in register_irq_proc()
380 	proc_create_single_data("node", 0444, desc->dir, irq_node_proc_show,  in register_irq_proc()
383 	proc_create_single_data("effective_affinity", 0444, desc->dir,  in register_irq_proc()
385 	proc_create_single_data("effective_affinity_list", 0444, desc->dir,  in register_irq_proc()
389 	proc_create_single_data("spurious", 0444, desc->dir,  in register_irq_proc()
400 	if (!root_irq_dir || !desc->dir)  in unregister_irq_proc()
403 	remove_proc_entry("smp_affinity", desc->dir);  in unregister_irq_proc()
404 	remove_proc_entry("affinity_hint", desc->dir);  in unregister_irq_proc()
405 	remove_proc_entry("smp_affinity_list", desc->dir);  in unregister_irq_proc()
406 	remove_proc_entry("node", desc->dir);  in unregister_irq_proc()
408 	remove_proc_entry("effective_affinity", desc->dir);  in unregister_irq_proc()
409 	remove_proc_entry("effective_affinity_list", desc->dir);  in unregister_irq_proc()
412 	remove_proc_entry("spurious", desc->dir);  in unregister_irq_proc()
422 	proc_remove(action->dir);  in unregister_handler_proc()
486 			seq_printf(p, "CPU%-8d", j);  in show_interrupts()
495 	if (!desc->action || irq_desc_is_chained(desc) || !desc->kstat_irqs)  in show_interrupts()
500 		unsigned int cnt = desc->kstat_irqs ? per_cpu(desc->kstat_irqs->cnt, j) : 0;  in show_interrupts()
506 	raw_spin_lock_irqsave(&desc->lock, flags);  in show_interrupts()
507 	if (desc->irq_data.chip) {  in show_interrupts()
508 		if (desc->irq_data.chip->irq_print_chip)  in show_interrupts()
509 			desc->irq_data.chip->irq_print_chip(&desc->irq_data, p);  in show_interrupts()
510 		else if (desc->irq_data.chip->name)  in show_interrupts()
511 			seq_printf(p, "%8s", desc->irq_data.chip->name);  in show_interrupts()
513 			seq_printf(p, "%8s", "-");  in show_interrupts()
517 	if (desc->irq_data.domain)  in show_interrupts()
518 		seq_printf(p, " %*lu", prec, desc->irq_data.hwirq);  in show_interrupts()
522 	seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");  in show_interrupts()
524 	if (desc->name)  in show_interrupts()
525 		seq_printf(p, "-%-8s", desc->name);  in show_interrupts()
527 	action = desc->action;  in show_interrupts()
529 		seq_printf(p, "  %s", action->name);  in show_interrupts()
530 		while ((action = action->next) != NULL)  in show_interrupts()
531 			seq_printf(p, ", %s", action->name);  in show_interrupts()
535 	raw_spin_unlock_irqrestore(&desc->lock, flags);  in show_interrupts()