From: Arnd Bergmann <arnd@arndb•de>
To: Benjamin Herrenschmidt <benh@kernel•crashing.org>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs•org>,
Paul Mackerras <paulus@samba•org>,
"cbe-oss-dev@ozlabs•org" <cbe-oss-dev@ozlabs•org>
Subject: Re: [PATCH] Cell interrupt rework (final)
Date: Fri, 29 Sep 2006 09:51:06 +0200 [thread overview]
Message-ID: <200609290951.07215.arnd@arndb.de> (raw)
In-Reply-To: <1159506029.15792.18.camel@localhost.localdomain>
On Friday 29 September 2006 07:00, Benjamin Herrenschmidt wrote:
> This patch reworks the cell iic interrupt handling so that:
>=20
> =A0- 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=3D1
> 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.
>=20
> =A0- 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.
>=20
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel•crashing.org>
Acked-by: Arnd Bergmann <arnd.bergmann@de•ibm.com>
next prev parent reply other threads:[~2006-09-29 7:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-29 5:00 [PATCH] Cell interrupt rework (final) Benjamin Herrenschmidt
2006-09-29 7:51 ` Arnd Bergmann [this message]
2006-10-07 8:55 ` Christoph Hellwig
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