From: "David P. Reed" <dpreed@reed.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Rene Herman <rene.herman@keyaccess.nl>,
Ingo Molnar <mingo@elte.hu>, Islam Amer <pharon@gmail.com>,
hpa@zytor.com, Pavel Machek <pavel@ucw.cz>,
Ingo Molnar <mingo@redhat.com>, Andi Kleen <andi@firstfloor.org>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override
Date: Sun, 30 Dec 2007 18:14:51 -0500 [thread overview]
Message-ID: <4778266B.2060502@reed.com> (raw)
In-Reply-To: <20071230213623.410d480a@the-village.bc.nu>
Alan Cox wrote:
>> Now what's interesting is that the outb to port 80 is *faster* than an
>> outb to an unused port, on my machine. So there's something there -
>> actually accepting the bus transaction. In the ancient 5150 PC, 80 was
>>
>
> Yes and I even told you a while back how to verify where it is. From the
> timing you get its not on the LPC bus but chipset core so pretty
> certainly an SMM trap as other systems with the same chipset don't have
> the bug. Probably all that is needed is a BIOS upgrade
>
>
Actually, I could see whether it was SMM trapping due to AMD MSR's that
would allow such trapping, performance or debug registers. Nothing was
set to trap with SMI or other traps on any port outputs. But I'm
continuing to investigate for a cause. It would be nice if it were a
BIOS-fixable problem. It would be even nicer if the BIOS were GPL...
next prev parent reply other threads:[~2007-12-30 23:15 UTC|newest]
Thread overview: 186+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-30 3:34 [PATCH] x86: provide a DMI based port 0x80 I/O delay override Rene Herman
2007-12-30 9:30 ` Linus Torvalds
2007-12-30 12:48 ` Andi Kleen
2007-12-30 13:05 ` Ingo Molnar
2007-12-30 16:08 ` Andi Kleen
2007-12-30 16:28 ` Ingo Molnar
2007-12-30 18:21 ` Andi Kleen
2007-12-30 13:03 ` Ingo Molnar
2007-12-30 14:14 ` Rene Herman
2007-12-30 14:47 ` Alan Cox
2007-12-30 15:28 ` Ingo Molnar
2007-12-30 15:38 ` Alan Cox
2007-12-30 16:01 ` Ingo Molnar
2007-12-30 16:48 ` Alan Cox
2007-12-30 17:08 ` Ingo Molnar
2007-12-30 18:14 ` Rene Herman
2007-12-30 18:39 ` Alan Cox
2007-12-30 19:33 ` Rene Herman
2007-12-30 20:00 ` Linus Torvalds
2007-12-30 20:09 ` Rene Herman
2007-12-30 21:20 ` David P. Reed
2007-12-30 21:36 ` Alan Cox
2007-12-30 23:14 ` David P. Reed [this message]
2007-12-31 0:23 ` H. Peter Anvin
2007-12-31 11:59 ` Alan Cox
2007-12-31 18:19 ` H. Peter Anvin
2007-12-31 12:23 ` Alan Cox
2007-12-31 14:35 ` Rene Herman
2007-12-31 15:56 ` Alan Cox
2007-12-31 20:22 ` Ondrej Zary
2007-12-31 21:25 ` Alan Cox
2007-12-31 21:47 ` H. Peter Anvin
2007-12-31 23:24 ` Alan Cox
2007-12-31 23:41 ` H. Peter Anvin
2008-01-02 3:01 ` Rene Herman
2007-12-30 17:10 ` Juergen Beisert
2007-12-30 20:50 ` H. Peter Anvin
2007-12-31 1:03 ` David P. Reed
2007-12-31 1:40 ` H. Peter Anvin
2007-12-30 15:47 ` Rene Herman
2007-12-30 16:07 ` Ingo Molnar
2007-12-30 16:27 ` Rene Herman
2007-12-30 17:06 ` Ingo Molnar
2007-12-30 17:54 ` Rene Herman
2007-12-30 18:29 ` Alan Cox
2007-12-30 18:43 ` Andi Kleen
2007-12-30 20:46 ` Ingo Molnar
2007-12-30 21:07 ` Rene Herman
2007-12-30 21:25 ` Ingo Molnar
2007-12-30 21:29 ` Alan Cox
2007-12-30 22:03 ` Ingo Molnar
2007-12-31 13:11 ` Pavel Machek
2008-01-01 16:48 ` Ingo Molnar
2007-12-30 18:40 ` Linus Torvalds
2007-12-30 20:34 ` Ingo Molnar
2007-12-30 21:28 ` Alan Cox
2007-12-30 21:54 ` Ingo Molnar
2007-12-30 21:13 ` Alan Cox
2007-12-31 15:29 ` Christer Weinigel
2007-12-31 13:21 ` Pavel Machek
2007-12-31 12:29 ` Alan Cox
[not found] <9BdU5-1YW-9@gated-at.bofh.it>
[not found] ` <9BeZN-3Gf-5@gated-at.bofh.it>
[not found] ` <9BnTB-1As-31@gated-at.bofh.it>
[not found] ` <9BrX4-8go-1@gated-at.bofh.it>
[not found] ` <9BuBG-4eR-51@gated-at.bofh.it>
[not found] ` <9BvRd-6aL-71@gated-at.bofh.it>
[not found] ` <9GRQW-1DX-13@gated-at.bofh.it>
[not found] ` <9GSah-23W-1@gated-at.bofh.it>
[not found] ` <9GSDy-2GD-23@gated-at.bofh.it>
[not found] ` <9GTpK-40d-15@gated-at.bofh.it>
[not found] ` <9GUvy-5H2-11@gated-at.bofh.it>
[not found] ` <9GVKU-7SS-25@gated-at.bofh.it>
2008-01-07 19:38 ` Bodo Eggert
2008-01-07 19:46 ` H. Peter Anvin
2008-01-07 22:02 ` Bodo Eggert
2008-01-07 22:10 ` H. Peter Anvin
2008-01-07 22:27 ` Bodo Eggert
2008-01-07 22:59 ` Rene Herman
2008-01-07 23:24 ` H. Peter Anvin
2008-01-07 23:26 ` Rene Herman
2008-01-08 0:10 ` [linux-kernel] " David P. Reed
2008-01-09 21:01 ` Matthieu castet
2008-01-08 12:51 ` Bodo Eggert
2008-01-08 14:09 ` Rene Herman
2008-01-08 14:31 ` Alan Cox
2008-01-07 23:25 ` Alan Cox
2008-01-08 13:17 ` Bodo Eggert
2008-01-08 14:38 ` Alan Cox
2008-01-08 3:15 ` Christer Weinigel
[not found] <fa.PuxU73ceCfHAUeWLO4W21Zbrm7A@ifi.uio.no>
[not found] ` <fa.ipKZdmvkNYmQ40C0cO+2u3eYohw@ifi.uio.no>
[not found] ` <fa.ppsa4qOLo1V8UlDNTucnaqIJmKA@ifi.uio.no>
[not found] ` <fa.3IG7z0AfHuLo9eQjn7Gkl/+/lnA@ifi.uio.no>
[not found] ` <fa.slc2tTnUBrTGO2aTi/C5UGHEEEM@ifi.uio.no>
[not found] ` <fa.8g+KfLLge6wS5cEnKhZJmdkIVAI@ifi.uio.no>
2007-12-30 18:22 ` Robert Hancock
[not found] ` <fa.XY5q1SY4QX+yjnE6p8T3kbTt/8I@ifi.uio.no>
[not found] ` <fa.KEBfnq5vGkAJSEhZSx7+yy+Hdbs@ifi.uio.no>
[not found] ` <fa.MLKgXLxgzIKzm4bQXjEOqg9oDwU@ifi.uio.no>
[not found] ` <fa.KbCnGLPlUEYe/Ibajd+hTY7A7Qw@ifi.uio.no>
2007-12-31 18:21 ` Robert Hancock
[not found] <9FXbU-3M4-11@gated-at.bofh.it>
[not found] ` <9G2Om-4hg-1@gated-at.bofh.it>
[not found] ` <9G7O3-3O2-7@gated-at.bofh.it>
[not found] ` <9G8qN-4TX-13@gated-at.bofh.it>
2007-12-30 17:50 ` Bodo Eggert
2007-12-30 18:10 ` Ingo Molnar
2007-12-30 20:56 ` H. Peter Anvin
2007-12-30 21:00 ` Ingo Molnar
2007-12-30 21:32 ` Bodo Eggert
2007-12-30 21:33 ` Alan Cox
2007-12-30 22:02 ` Ingo Molnar
2007-12-30 21:44 ` H. Peter Anvin
2007-12-30 21:58 ` Rene Herman
2007-12-30 20:53 ` H. Peter Anvin
2007-12-30 21:31 ` Alan Cox
2007-12-31 14:39 ` Bodo Eggert
2007-12-31 15:56 ` Alan Cox
[not found] <469578CD.3080609@reed.com>
[not found] ` <1184216528.12353.203.camel@chaos>
[not found] ` <1184218962.12353.209.camel@chaos>
[not found] ` <46964352.7040301@reed.com>
[not found] ` <1184253339.12353.223.camel@chaos>
[not found] ` <469697C6.50903@reed.com>
[not found] ` <1184274754.12353.254.camel@chaos>
2007-12-14 2:59 ` [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc David P. Reed
2007-12-14 13:15 ` Ingo Molnar
2007-12-14 18:02 ` H. Peter Anvin
2007-12-14 21:06 ` Pavel Machek
2007-12-14 22:13 ` H. Peter Anvin
2007-12-14 23:29 ` Alan Cox
2007-12-15 8:08 ` Paul Rolland
2007-12-15 8:13 ` Rene Herman
2007-12-15 20:27 ` H. Peter Anvin
2007-12-15 23:26 ` [PATCH] x86: " Rene Herman
2007-12-15 23:51 ` H. Peter Anvin
2007-12-16 13:15 ` [PATCH] x86: provide a DMI based port 0x80 I/O delay override Rene Herman
2007-12-16 15:22 ` Ingo Molnar
2007-12-17 1:43 ` Rene Herman
2007-12-17 2:05 ` H. Peter Anvin
2007-12-17 2:19 ` Rene Herman
2007-12-17 3:35 ` H. Peter Anvin
2007-12-17 13:02 ` Rene Herman
2007-12-17 17:14 ` H. Peter Anvin
2007-12-17 19:43 ` David P. Reed
2007-12-17 19:55 ` H. Peter Anvin
2007-12-17 21:02 ` David P. Reed
2007-12-17 21:17 ` H. Peter Anvin
2007-12-17 21:25 ` Alan Cox
2008-01-01 15:57 ` David P. Reed
2008-01-01 21:16 ` H. Peter Anvin
2008-01-01 15:59 ` David P. Reed
2008-01-01 16:15 ` Alan Cox
2008-01-01 16:43 ` Ingo Molnar
2008-01-01 17:32 ` Alan Cox
2008-01-01 18:45 ` Ingo Molnar
2008-01-01 20:14 ` Christer Weinigel
2008-01-01 21:13 ` Alan Cox
2008-01-01 21:07 ` Alan Cox
2008-01-02 10:04 ` Ingo Molnar
2008-01-02 13:47 ` Alan Cox
2008-01-02 15:35 ` Rene Herman
2008-01-02 15:50 ` Rene Herman
2008-01-01 17:32 ` Christer Weinigel
2008-01-01 18:46 ` Ingo Molnar
2008-01-01 19:35 ` Christer Weinigel
2008-01-01 19:59 ` Rene Herman
2008-01-01 20:55 ` Christer Weinigel
2008-01-01 21:24 ` H. Peter Anvin
2008-01-01 21:01 ` Ingo Molnar
2008-01-01 21:26 ` Alan Cox
2008-01-01 21:42 ` Christer Weinigel
2008-01-01 21:42 ` Rene Herman
2008-01-01 21:50 ` H. Peter Anvin
2008-01-01 21:21 ` H. Peter Anvin
2008-01-01 23:05 ` Christer Weinigel
2008-01-01 23:12 ` Alan Cox
2008-01-02 0:23 ` Christer Weinigel
2008-01-02 10:00 ` Ingo Molnar
2008-01-01 17:32 ` David P. Reed
2008-01-01 17:38 ` Alan Cox
2008-01-01 21:15 ` H. Peter Anvin
2008-01-01 21:35 ` Rene Herman
2008-01-01 21:44 ` H. Peter Anvin
2008-01-01 22:35 ` Rene Herman
2008-01-01 22:39 ` H. Peter Anvin
2008-01-01 23:11 ` Rene Herman
2008-01-02 0:25 ` Rene Herman
2008-01-02 0:55 ` Christer Weinigel
2008-01-02 1:00 ` Rene Herman
2008-01-02 2:27 ` H. Peter Anvin
2008-01-09 17:27 ` Maciej W. Rozycki
2008-01-09 18:18 ` H. Peter Anvin
2008-01-01 17:31 ` Pavel Machek
2008-01-01 17:33 ` David P. Reed
2007-12-17 4:09 ` H. Peter Anvin
2007-12-17 10:57 ` Ingo Molnar
2007-12-17 11:29 ` Ingo Molnar
2007-12-17 13:34 ` David P. Reed
2007-12-17 12:15 ` Rene Herman
2007-12-17 13:09 ` Ingo Molnar
2007-12-17 13:22 ` Rene Herman
2007-12-17 13:31 ` Pavel Machek
2007-12-17 13:31 ` Rene Herman
2007-12-17 13:32 ` David P. Reed
2007-12-17 13:36 ` Rene Herman
2007-12-17 14:39 ` Ingo Molnar
2007-12-17 16:12 ` Alan Cox
2007-12-17 16:48 ` Ingo Molnar
2007-12-17 20:48 ` Rene Herman
2007-12-17 20:57 ` H. Peter Anvin
2007-12-17 21:33 ` Rene Herman
2007-12-17 21:40 ` H. Peter Anvin
2007-12-17 21:46 ` Ingo Molnar
2007-12-17 21:50 ` Rene Herman
2007-12-17 21:41 ` Ingo Molnar
2007-12-17 21:47 ` Rene Herman
2007-12-17 21:56 ` Ingo Molnar
2007-12-17 22:01 ` Rene Herman
2007-12-17 22:18 ` David P. Reed
2007-12-17 19:38 ` David P. Reed
2007-12-17 19:55 ` H. Peter Anvin
2007-12-17 21:28 ` Ingo Molnar
2007-12-16 21:42 ` H. Peter Anvin
2007-12-17 1:48 ` Rene Herman
2007-12-17 1:53 ` H. Peter Anvin
2007-12-16 23:12 ` David P. Reed
2007-12-17 1:56 ` Rene Herman
2007-12-17 2:04 ` H. Peter Anvin
2007-12-17 2:15 ` Rene Herman
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=4778266B.2060502@reed.com \
--to=dpreed@reed.com \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=andi@firstfloor.org \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=mingo@redhat.com \
--cc=pavel@ucw.cz \
--cc=pharon@gmail.com \
--cc=rene.herman@keyaccess.nl \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
/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;
as well as URLs for NNTP newsgroup(s).