Re: [Xen-devel] [PATCH v3 11/18] xen/arm: IRQ: Defer routing IRQ to Xen until setup_irq() call

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2014-04-08 at 15:44 +0100, Julien Grall wrote:
> When an IRQ is handling by Xen, setup is done in 2 steps:
>     - Route the IRQ to the current CPU and set priorities
>     - Set up the handler
> 
> For PPIs, these steps are called on every cpu. For SPIs, they are only called
> on the boot CPU.
> 
> Dividing the setup in two step complicates the code when a new driver is
> added to Xen (for instance a SMMU driver). Xen can safely route the IRQ
> when the driver sets up the interrupt handler.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>



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