linux-kernel - Re: [PATCH 1/3 -v4] x86_64 EFI runtime service support: EFI basic runtime service support

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Date:	Fri, 26 Oct 2007 13:37:02 +0200
From:	Andi Kleen <ak@...e.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	"Huang, Ying" <ying.huang@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Chandramouli Narayanan <mouli@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH 1/3 -v4] x86_64 EFI runtime service support: EFI basic runtime service support


> I still do not understand why we need all this EFI hackery at all
> aside of the possible usage for saving a crash dump on FLASH, which we
> could do directly from the kernel as well.

Battery backed up RAM not Flash. The layout of that RAM is BIOS dependent so 
we need some BIOS support for change it. Essentially it's a way to put 
something into the BIOS event log.

-Andi
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