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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140// 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);}