1
 2#include <linux/irq.h>
 3#include <linux/interrupt.h>
 4
 5#include "internals.h"
 6
 7void irq_move_masked_irq(struct irq_data *idata)
 8{
 9	struct irq_desc *desc = irq_data_to_desc(idata);
10	struct irq_chip *chip = idata->chip;
11
12	if (likely(!irqd_is_setaffinity_pending(&desc->irq_data)))
13		return;
14
 
 
15	/*
16	 * Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
17	 */
18	if (!irqd_can_balance(&desc->irq_data)) {
19		WARN_ON(1);
20		return;
21	}
22
23	irqd_clr_move_pending(&desc->irq_data);
24
25	if (unlikely(cpumask_empty(desc->pending_mask)))
26		return;
27
28	if (!chip->irq_set_affinity)
29		return;
30
31	assert_raw_spin_locked(&desc->lock);
32
33	/*
34	 * If there was a valid mask to work with, please
35	 * do the disable, re-program, enable sequence.
36	 * This is *not* particularly important for level triggered
37	 * but in a edge trigger case, we might be setting rte
38	 * when an active trigger is coming in. This could
39	 * cause some ioapics to mal-function.
40	 * Being paranoid i guess!
41	 *
42	 * For correct operation this depends on the caller
43	 * masking the irqs.
44	 */
45	if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids)
46		irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false);
47
48	cpumask_clear(desc->pending_mask);
49}
50
51void irq_move_irq(struct irq_data *idata)
52{
53	bool masked;
 
 
 
 
 
 
 
54
55	if (likely(!irqd_is_setaffinity_pending(idata)))
56		return;
57
58	if (unlikely(irqd_irq_disabled(idata)))
59		return;
60
61	/*
62	 * Be careful vs. already masked interrupts. If this is a
63	 * threaded interrupt with ONESHOT set, we can end up with an
64	 * interrupt storm.
65	 */
66	masked = irqd_irq_masked(idata);
67	if (!masked)
68		idata->chip->irq_mask(idata);
69	irq_move_masked_irq(idata);
70	if (!masked)
71		idata->chip->irq_unmask(idata);
72}

 1
 2#include <linux/irq.h>
 3#include <linux/interrupt.h>
 4
 5#include "internals.h"
 6
 7void irq_move_masked_irq(struct irq_data *idata)
 8{
 9	struct irq_desc *desc = irq_data_to_desc(idata);
10	struct irq_chip *chip = desc->irq_data.chip;
11
12	if (likely(!irqd_is_setaffinity_pending(&desc->irq_data)))
13		return;
14
15	irqd_clr_move_pending(&desc->irq_data);
16
17	/*
18	 * Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
19	 */
20	if (irqd_is_per_cpu(&desc->irq_data)) {
21		WARN_ON(1);
22		return;
23	}
24
 
 
25	if (unlikely(cpumask_empty(desc->pending_mask)))
26		return;
27
28	if (!chip->irq_set_affinity)
29		return;
30
31	assert_raw_spin_locked(&desc->lock);
32
33	/*
34	 * If there was a valid mask to work with, please
35	 * do the disable, re-program, enable sequence.
36	 * This is *not* particularly important for level triggered
37	 * but in a edge trigger case, we might be setting rte
38	 * when an active trigger is coming in. This could
39	 * cause some ioapics to mal-function.
40	 * Being paranoid i guess!
41	 *
42	 * For correct operation this depends on the caller
43	 * masking the irqs.
44	 */
45	if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids)
46		irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false);
47
48	cpumask_clear(desc->pending_mask);
49}
50
51void irq_move_irq(struct irq_data *idata)
52{
53	bool masked;
54
55	/*
56	 * Get top level irq_data when CONFIG_IRQ_DOMAIN_HIERARCHY is enabled,
57	 * and it should be optimized away when CONFIG_IRQ_DOMAIN_HIERARCHY is
58	 * disabled. So we avoid an "#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY" here.
59	 */
60	idata = irq_desc_get_irq_data(irq_data_to_desc(idata));
61
62	if (likely(!irqd_is_setaffinity_pending(idata)))
63		return;
64
65	if (unlikely(irqd_irq_disabled(idata)))
66		return;
67
68	/*
69	 * Be careful vs. already masked interrupts. If this is a
70	 * threaded interrupt with ONESHOT set, we can end up with an
71	 * interrupt storm.
72	 */
73	masked = irqd_irq_masked(idata);
74	if (!masked)
75		idata->chip->irq_mask(idata);
76	irq_move_masked_irq(idata);
77	if (!masked)
78		idata->chip->irq_unmask(idata);
79}