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authorMarc Zyngier <marc.zyngier@arm.com>2017-08-18 09:11:56 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-08-18 10:36:24 +0200
commit536e2e34bd002267384b0668ffff3f023003a830 (patch)
tree4c5311acc59863a845a7c88702082c48ed8db636 /include
parent7cb2fad97ee057c7b0cb5913074eee8071490a71 (diff)
genirq/debugfs: Triggering of interrupts from userspace
When developing new (and therefore buggy) interrupt related code, it can sometimes be useful to inject interrupts without having to rely on a device to actually generate them. This functionnality relies either on the irqchip driver to expose a irq_set_irqchip_state(IRQCHIP_STATE_PENDING) callback, or on the core code to be able to retrigger a (edge-only) interrupt. To use this feature: echo -n trigger > /sys/kernel/debug/irq/irqs/IRQNUM WARNING: This is DANGEROUS, and strictly a debug feature. Do not use it on a production system. Your HW is likely to catch fire, your data to be corrupted, and reporting this will make you look an even bigger fool than the idiot who wrote this patch. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170818081156.9264-1-marc.zyngier@arm.com
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