linux-kernel - Re: [PATCH] Add quirk to set AHCI mode on ICH boards

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Message-ID: <20071109120425.543971bf@the-village.bc.nu>
Date:	Fri, 9 Nov 2007 12:04:25 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Mark Lord <liml@....ca>, Riki Oktarianto <rkoktarianto@...il.com>,
	linux-kernel@...r.kernel.org, Greg Kroah-Hartman <gregkh@...e.de>,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH] Add quirk to set AHCI mode on ICH boards

On Thu, 8 Nov 2007 22:46:22 -0500
Jeff Garzik <jeff@...zik.org> wrote:

> On Thu, Nov 08, 2007 at 10:29:37PM -0500, Mark Lord wrote:
> > And I might even privately patch my own kernels to map the ACHI BAR
> > in the cases where the BIOS didn't...
> 
> The inability to do this in the general case is the main reason why
> AHCI was not unconditionally enabled, even in IDE mode, when it was
> originally added...  :/

We've done it all the time for various devices without problems (eg S3
video cards). I'd like to see it go in - although perhaps attached to a
force_ahci boot param initially
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