From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jesse Barnes <jbarnes@engr.sgi.com>
Date: Mon, 07 Mar 2005 23:11:46 +0000
Subject: Re: PCI Express
Message-Id: <200503071511.47177.jbarnes@engr.sgi.com>
List-Id: <linux-ia64.vger.kernel.org>
References: <4228F250.7C5E2E3C@sgi.com>
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To: linux-ia64@vger.kernel.org

On Monday, March 7, 2005 3:03 pm, Nguyen, Tom L wrote:
> On Monday, March 07, 2005 12:41 PM Colin Ngam wrote:
> > I looked at Documentation/MSI-HOWTO.txt(linux-ia64-release-2.6.11) and
> >
> > it mentioned that CONFIG_X86_LOCAL_APIC has to be configured.  I did
>
> not
>
> > find this configured on in any sample ia64 config files, but it does
> > exist in defconfig for i386.  Is this just an ia32 config option?
>
> IA64 uses SAPIC instead of IOxAPIC. SAPIC, which is somewhat similar to
> IOxAPIC, is included in IA64 kernel. MSI/MSI-X support configuration
> option therefore is always available in IA64.

So the MSIs are programmed to point at the processor SAPIC block?  I think 
that'll work for us on Altix, but if they're pointed at an external Intel (or 
compatible) interrupt controller, we'll have to write new code for Altix.

Jesse