linux-kernel - Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86

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Message-ID: <20100409234245.4081994a@lxorguk.ukuu.org.uk>
Date:	Fri, 9 Apr 2010 23:42:45 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	guenter.roeck@...csson.com, linux-kernel@...r.kernel.org,
	Yinghai <yinghai.lu@...cle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	Andy Isaacson <adi@...apodia.org>,
	Thomas Renninger <trenn@...e.de>
Subject: Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as
 x86_32

> "Don't use legacy fixed-function addresses for nonstandard purposes."
> 
> There, there is your documentation.

It's probably a good idea to only reserve it if the space is actually
being used. There are a variety of legitimate reasons to use that space
for other things on embedded x86 boards.

They are only "legacy fixed function" if you have a PCI bus...
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