gicv3: 1 of N model implementation related

[ckadabi at codeaurora.org]

Hi Mark:

I have some question related to gicv3 driver on 1 of N distribution 
model.
Looking at the linux kernel implementation the interrupt is always 
affined to the first online cpu and does not use the 1 of N distribution 
model.
As per the Gic spec 1 of N model could help to achieve low latency as 
handling the interrupts as there are more PE's participating in handling 
the interrupt.

Is there a reason the Linux kernel driver does not implement the 1 of N 
model?

Thanks,
Channa

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