// SPDX-License-Identifier: GPL-2.0
#include <linux/irq.h>
#include <linux/interrupt.h>
#include "internals.h"
/**
* irq_fixup_move_pending - Cleanup irq move pending from a dying CPU
* @ desc : Interrupt descriptor to clean up
* @ force_clear : If set clear the move pending bit unconditionally .
* If not set , clear it only when the dying CPU is the
* last one in the pending mask .
*
* Returns true if the pending bit was set and the pending mask contains an
* online CPU other than the dying CPU .
*/
bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear)
{
struct irq_data *data = irq_desc_get_irq_data(desc);
if (!irqd_is_setaffinity_pending(data))
return false ;
/*
* The outgoing CPU might be the last online target in a pending
* interrupt move . If that ' s the case clear the pending move bit .
*/
if (!cpumask_intersects(desc->pending_mask, cpu_online_mask)) {
irqd_clr_move_pending(data);
return false ;
}
if (force_clear)
irqd_clr_move_pending(data);
return true ;
}
void irq_force_complete_move(struct irq_desc *desc)
{
for (struct irq_data *d = irq_desc_get_irq_data(desc); d; d = irqd_get_parent_data(d)) {
if (d->chip && d->chip->irq_force_complete_move) {
d->chip->irq_force_complete_move(d);
return ;
}
}
}
void irq_move_masked_irq(struct irq_data *idata)
{
struct irq_desc *desc = irq_data_to_desc(idata);
struct irq_data *data = &desc->irq_data;
struct irq_chip *chip = data->chip;
if (likely(!irqd_is_setaffinity_pending(data)))
return ;
irqd_clr_move_pending(data);
/*
* Paranoia : cpu - local interrupts shouldn ' t be calling in here anyway .
*/
if (irqd_is_per_cpu(data)) {
WARN_ON(1 );
return ;
}
if (unlikely(cpumask_empty(desc->pending_mask)))
return ;
if (!chip->irq_set_affinity)
return ;
assert_raw_spin_locked(&desc->lock);
/*
* If there was a valid mask to work with , please
* do the disable , re - program , enable sequence .
* This is * not * particularly important for level triggered
* but in a edge trigger case , we might be setting rte
* when an active trigger is coming in . This could
* cause some ioapics to mal - function .
* Being paranoid i guess !
*
* For correct operation this depends on the caller
* masking the irqs .
*/
if (cpumask_intersects(desc->pending_mask, cpu_online_mask)) {
int ret;
ret = irq_do_set_affinity(data, desc->pending_mask, false );
/*
* If the there is a cleanup pending in the underlying
* vector management , reschedule the move for the next
* interrupt . Leave desc - > pending_mask intact .
*/
if (ret == -EBUSY) {
irqd_set_move_pending(data);
return ;
}
}
cpumask_clear(desc->pending_mask);
}
void __irq_move_irq(struct irq_data *idata)
{
bool masked;
/*
* Get top level irq_data when CONFIG_IRQ_DOMAIN_HIERARCHY is enabled ,
* and it should be optimized away when CONFIG_IRQ_DOMAIN_HIERARCHY is
* disabled . So we avoid an " # ifdef CONFIG_IRQ_DOMAIN_HIERARCHY " here .
*/
idata = irq_desc_get_irq_data(irq_data_to_desc(idata));
if (unlikely(irqd_irq_disabled(idata)))
return ;
/*
* Be careful vs . already masked interrupts . If this is a
* threaded interrupt with ONESHOT set , we can end up with an
* interrupt storm .
*/
masked = irqd_irq_masked(idata);
if (!masked)
idata->chip->irq_mask(idata);
irq_move_masked_irq(idata);
if (!masked)
idata->chip->irq_unmask(idata);
}
bool irq_can_move_in_process_context(struct irq_data *data)
{
/*
* Get the top level irq_data in the hierarchy , which is optimized
* away when CONFIG_IRQ_DOMAIN_HIERARCHY is disabled .
*/
data = irq_desc_get_irq_data(irq_data_to_desc(data));
return irq_can_move_pcntxt(data);
}
Messung V0.5 in Prozent C=94 H=96 G=94
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-27)
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