Generic Interrupt Controller versions 3 and 4: Difference between revisions
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In GICv2, the special IntID 1022 is used to signal to the Secure Monitor that the current highest priority IRQ was meant to be handled in non-secure world (most likely by the hypervisor). In GICv3 onwards, this value is deprecated.
In GICv2 and GICv3 onwards, IntID 1023 is used to signal a Spurious IRQ, or to state to a non-secure world handler that the current highest-priority IRQ is meant to be handled by the secure world. In both cases, the non-secure reader would just ignore the interrupt anyway.
In GICv3 onwards, two new special IntIDs are introduced:
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