[PATCH] Cell interrupt rework (final)

Arnd Bergmann arnd at arndb.de
Fri Sep 29 17:51:06 EST 2006

On Friday 29 September 2006 07:00, Benjamin Herrenschmidt wrote:
> This patch reworks the cell iic interrupt handling so that:
>  - Node ID is back in the interrupt number (only one IRQ host is created
> for all nodes). This allows interrupts from sources on another node to
> be routed non-locally. This will allow possibly one day to fix maxcpus=1
> or 2 and still get interrupts from devices on BE 1. (A bit more fixing
> is needed for that) and it will allow us to implement actual affinity
> control of external interrupts.
>  - Added handling of the IO exceptions interrupts (badly named, but I
> re-used the name initially used by STI). Those are the interrupts
> exposed by IIC_ISR and IIC_IRR, such as the IOC translation exception,
> performance monitor, etc... Those get their special numbers in the IRQ
> number space and are internally implemented as a cascade on unit 0xe,
> class 1 of each node.
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

Acked-by: Arnd Bergmann <arnd.bergmann at de.ibm.com>

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