From: Andi Kleen <ak@suse.de>
To: Martin Wilck <martin.wilck@fujitsu-siemens.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: APIC version and 8-bit APIC IDs
Date: 12 Aug 2005 13:43:52 +0200 [thread overview]
Message-ID: <p73pssj2xdz.fsf@verdi.suse.de> (raw)
In-Reply-To: <42FC8461.2040102@fujitsu-siemens.com.suse.lists.linux.kernel>
Martin Wilck <martin.wilck@fujitsu-siemens.com> writes:
> Hi William, hello everyone,
>
> The MP_valid_apicid() function [arch/i386/kernel/mpparse.c] checks
> whether the APIC version field is >=20 in order to determine whether
> the CPU supports 8-bit physical APIC ids.
Yes, it's broken. In fact I removed it in my physflat32 patch
which is needed for 16 core AMD systems. I don't think there
is a generic way to fix it because the XAPIC check breaks
on AMD systems and there is no good way to decide early
on subarchitectures before doing this check. Also it's only
a sanity check for broken BIOS, and in this case it causes more problems
than it solves.
ftp://ftp.firstfloor.org/pub/ak/x86_64/x86_64-2.6.13rc3-1/patches/physflat32
Will hopefully be fixed in 2.6.14.
-Andi
next parent reply other threads:[~2005-08-12 11:43 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <42FC8461.2040102@fujitsu-siemens.com.suse.lists.linux.kernel>
2005-08-12 11:43 ` Andi Kleen [this message]
2005-08-12 13:21 ` APIC version and 8-bit APIC IDs Martin Wilck
2005-08-12 13:32 ` Andi Kleen
2005-08-12 13:51 ` Martin Wilck
2005-08-12 14:55 ` Martin Wilck
2005-08-12 14:57 ` Andi Kleen
2005-08-12 16:37 ` yhlu
2005-08-12 16:42 ` Andi Kleen
2005-08-12 17:44 ` yhlu
2005-08-22 9:50 ` Martin Wilck
2005-08-23 11:10 ` Maciej W. Rozycki
2005-08-26 14:01 ` Martin Wilck
2005-08-26 14:50 ` Maciej W. Rozycki
2005-08-29 7:25 ` Martin Wilck
2005-08-12 18:19 ` Siddha, Suresh B
2005-08-12 18:22 ` Andi Kleen
2005-08-12 18:40 ` Siddha, Suresh B
2005-08-12 18:50 ` Andi Kleen
2005-08-31 13:13 ` Martin Wilck
2005-08-31 13:25 ` Maciej W. Rozycki
2005-08-31 14:27 ` Martin Wilck
[not found] ` <4315B2D9.6080700@fujitsu-siemens.com>
[not found] ` <Pine.LNX.4.61L.0508311450020.10940@blysk.ds.pg.gda.pl>
2005-08-31 14:50 ` Martin Wilck
2005-08-31 14:40 ` Andi Kleen
2005-08-12 11:13 Martin Wilck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=p73pssj2xdz.fsf@verdi.suse.de \
--to=ak@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=martin.wilck@fujitsu-siemens.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox