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authorDaniel Thompson <daniel.thompson@linaro.org>2015-01-21 14:47:29 +0000
committerDaniel Thompson <daniel.thompson@linaro.org>2015-01-21 17:02:54 +0000
commit51d0de72371ef91361e57e245748f09f9a561bb7 (patch)
tree639b799e6aaaf256204f3d38ba98309706b3a36b /arch
parent5cb6d1ca756ca9ddbd5e22736348c685ead01fcb (diff)
downloadlinux-51d0de72371ef91361e57e245748f09f9a561bb7.tar.gz
irq: Allow interrupts to routed to NMI (or similar)
Some combinations of architectures and interrupt controllers make it possible for abitrary interrupt signals to be selectively made immune to masking by local_irq_disable(). For example, on ARM platforms, many interrupt controllers allow interrupts to be routed to FIQ rather than IRQ. These features could be exploited to implement debug and tracing features that can be implemented using NMI on x86 platforms (perf, hard lockup, kgdb). Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
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