lkml.org 
[lkml]   [2005]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: APIC version and 8-bit APIC IDs
Maciej W. Rozycki wrote:

> You are unfortunately mistaken -- the spec is explicit about *local* APIC
> IDs having to start at 0. There are at least two places in the spec that
> refer to that.

I see. Thanks for the clarification.

> You can always assign 0, 16, 17, etc. to local APICs and then 1, 2, 3,
> etc. for I/O APICs.

Actually, that's what we did (I messed thinks up in my posting). I think
that's an ugly configuration, though, and totally misleading in terms of
system topology.

> Frankly I don't know what the actual justification
> behind the requirement is. Note that the ID of 0 need not necessarily
> belong to the BSP.

Starting both local APICs and IO-APICs at 0 isa working and
aesthetically pleasing solution. We're pursuing that now.

Thanks again, Martin

--
Martin Wilck Phone: +49 5251 8 15113
Fujitsu Siemens Computers Fax: +49 5251 8 20409
Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com
D-33106 Paderborn http://www.fujitsu-siemens.com/primergy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-08-29 09:28    [from the cache]
©2003-2011 Jasper Spaans. Advertise on this site