forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include "internals.h"
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void irq_move_masked_irq(struct irq_data *idata)
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{
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struct irq_desc *desc = irq_data_to_desc(idata);
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struct irq_chip *chip = desc->irq_data.chip;
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if (likely(!irqd_is_setaffinity_pending(&desc->irq_data)))
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return;
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irqd_clr_move_pending(&desc->irq_data);
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/*
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* Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
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*/
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if (irqd_is_per_cpu(&desc->irq_data)) {
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WARN_ON(1);
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return;
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}
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if (unlikely(cpumask_empty(desc->pending_mask)))
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return;
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if (!chip->irq_set_affinity)
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return;
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assert_raw_spin_locked(&desc->lock);
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/*
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* If there was a valid mask to work with, please
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* do the disable, re-program, enable sequence.
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* This is *not* particularly important for level triggered
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* but in a edge trigger case, we might be setting rte
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* when an active trigger is coming in. This could
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* cause some ioapics to mal-function.
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* Being paranoid i guess!
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*
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* For correct operation this depends on the caller
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* masking the irqs.
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*/
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if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids)
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irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false);
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cpumask_clear(desc->pending_mask);
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}
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void irq_move_irq(struct irq_data *idata)
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{
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bool masked;
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/*
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* Get top level irq_data when CONFIG_IRQ_DOMAIN_HIERARCHY is enabled,
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* and it should be optimized away when CONFIG_IRQ_DOMAIN_HIERARCHY is
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* disabled. So we avoid an "#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY" here.
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*/
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idata = irq_desc_get_irq_data(irq_data_to_desc(idata));
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if (likely(!irqd_is_setaffinity_pending(idata)))
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return;
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if (unlikely(irqd_irq_disabled(idata)))
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return;
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/*
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* Be careful vs. already masked interrupts. If this is a
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* threaded interrupt with ONESHOT set, we can end up with an
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* interrupt storm.
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*/
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masked = irqd_irq_masked(idata);
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if (!masked)
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idata->chip->irq_mask(idata);
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irq_move_masked_irq(idata);
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if (!masked)
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idata->chip->irq_unmask(idata);
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}
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