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a string in "cpulist" format (such as `1,3-4`). If the configured affinity
is empty, then the affinity of the respective IRQs is not touched.
The option [option]`mode` is a string which can either be `set` (default)
or `intersect`. In `set` mode the [option]`affinity` is always written
as configured, whereas in `intersect` mode, the new affinity will be
calculated as the intersection of the current and the configured affinity.
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.Moving all IRQs to CPU0, except irq16, which is directed to CPU2
====
----
[irq_special]
type=irq
devices=irq16
affinity=2
[irq]
affinity=0
----
====
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irq (str): IRQ number (as string) or "DEFAULT"
affinity (set): affinity mask as set of CPUs
restoring (bool): are we rolling back a previous change?
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