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Re: [Xen-devel] [PATCH 4/6] xen/arm: platforms: Add Tegra platform to support basic IRQ routing

>> The purpose of tegra_interrupt_compat is to maintain a tegra-specific
>> whitelist of interrupt controllers we know how to route.  Presumably,
>> there may be custom boards out there that may have additional
>> interrupt routing capabilities that this patch set would not support
>> as-is.  I'm not sure of an appropriate way to maintain that logic and
>> merge them.  However, I am certainly open to suggestion, if you have
>> any ideas.
> Those custom boards would likely have a different machine compatible string
> because the SOC would be different. So I think the tegra_interrupt_compat is
> not necessary.

Sorry about the delayed response...

This check effectively filters out GPIO controllers.  Any GPIO-sourced
interrupts route through the GPIO controller's interrupt, and need not
apply for map_irq_to_domain().  Devices requiring GPIO-based
interrupts would need to be passed through with the associated
controller (or maybe virtualize the GPIO routing?).

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