Date: Sun, 16 Dec 2007 18:53:38 -0600
From: Robert Hancock <hancockr@shaw.ca>
Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on
 some AMD64x2 laptops, etc.
In-reply-to: <fa.RR732o3u5kvPHNspJA9tM1WHlKI@ifi.uio.no>
To: "David P. Reed" <dpreed@reed.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Ingo Molnar <mingo@elte.hu>,
       Rene Herman <rene.herman@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>,
       Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
       Ingo Molnar <mingo@redhat.com>, Rene Herman <rene.herman@keyaccess.nl>,
       Pavel Machek <pavel@ucw.cz>
Message-id: <4765C892.5090005@shaw.ca>
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David P. Reed wrote:
> PS: If I have time, I may try to build Rene's port 80 test for Windows 
> and run it under WinXP on this machine (I still have a crappy little 
> partition that boots it).   If it freezes the same way, it's almost 
> certain a design "feature", and if it doesn't freeze, we might suspect 
> that there is compensating logic in either Windows ACPI code or some way 
> that windows "sets up" the machine.

You'd have to replace the iopl call to an equivalent one for Windows 
(seems like NtSetInformationProcess(ProcessUserModeIOPL) might do what 
you need).

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

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