Embedded forum How interrupts are routed in EL3/EL2/EL1 mode

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How interrupts are routed in EL3/EL2/EL1 mode

uditknit over 6 years ago

Sorry for basic question,

For ARM64, we have different interrupt vector table for each mode EL3/EL2/EL1

I am wondering, how a specific IRQ is routed to given mode.

in GIC, I am not able to find such relation

Thanks

Udit

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Martin Weidmann over 6 years ago +1 verified

The routing of interrupts (IRQs and FIQs) is controlled by two registers: HCR_EL2 and SCR_EL3. In SCR_EL3, the IRQ and FIQ bits control which interrupts cause entry to EL3 In HCR_EL2, the IMO and...