linux-kernel - Re: [PATCH] ACPI: Implement overriding of arbitrary ACPI tables via initrd

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Message-ID: <4F6D504B.4000101@zytor.com>
Date:	Fri, 23 Mar 2012 21:40:43 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Thomas Renninger <trenn@...e.de>
CC:	eric.piel@...mplin-utc.net, vojcek@...n.pl, dsdt@...gusch.at,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	x86@...nel.org, Lin Ming <ming.m.lin@...el.com>, lenb@...nel.org,
	robert.moore@...el.com, Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] ACPI: Implement overriding of arbitrary ACPI tables via
 initrd

On 03/23/2012 08:02 PM, Thomas Renninger wrote:
> Whatabout Multiboot(2):
> http://en.wikipedia.org/wiki/Multiboot_Specification
> http://www.gnu.org/software/grub/manual/multiboot/multiboot.html
> 
> They do it similar to 2, but without specifying the data of the
> files like you do with type.
> 
> It's a bigger thing, but I could imagine there are some guys who would
> be willing to give it a try. I remember I googled a multiboot patch
> which got submitted to lkml long time ago.
> 
> It has it pros and cons, but should show up in such a discussion.
> 

Unfortunately Multiboot is defective in way too many ways, beginning
with its insistence of entering past the firmware point of no return,
which means the bootloader has to do a lot of work (this has been proven
to be a nonworkable solution) and no support for relocation.

So that is not an option.

	-hpa


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