linux-kernel - Re: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

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Date:	Wed, 09 Jan 2008 18:37:55 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	"David P. Reed" <dpreed@...d.com>
Cc:	Christer Weinigel <christer@...nigel.se>,
	Zachary Amsden <zach@...are.com>,
	Avi Kivity <avi@...amnet.com>,
	Ondrej Zary <linux@...nbow-software.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Rene Herman <rene.herman@...access.nl>,
	Bodo Eggert <7eggert@....de>, Ingo Molnar <mingo@...e.hu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Paul Rolland <rol@...917.net>, Pavel Machek <pavel@....cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	rol <rol@...be.net>
Subject: Re: Re: [PATCH] x86: provide a DMI based port 0x80 I/O
 delay override.

David P. Reed wrote:
> Christer Weinigel wrote:
>>
>> Did I miss anyting?
>>
>>   
> Nothing that seems *crucial* going forward for Linux.  The fate of
> "legacy machines" is really important to get right.
> 
> I have a small suggestion in mind that might be helpful in the future:
> the  "motherboard resources" discovered as PNP0C02 devices in their _CRS
> settings in ACPI during ACPI PnP startup should be reserved (or
> checked), and any drivers that still use port 80 implicitly should
> reserve that port.

I agree. In this case the BIOS on these laptops is trying to tell us 
"port 80 is used for our purposes, do not touch it". We should be listening.

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

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