linux-kernel - Re: [PATCH v3] x86, efi: Calling __pa() with an ioremap'd address is invalid

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Date:	Mon, 7 Nov 2011 21:23:28 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Zhang Rui <rui.zhang@...el.com>,
	Huang Ying <huang.ying.caritas@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] x86, efi: Calling __pa() with an ioremap'd address
 is invalid

On Mon, Nov 07, 2011 at 01:20:45PM -0800, H. Peter Anvin wrote:
> On 11/07/2011 01:07 PM, Matthew Garrett wrote:
> >>
> >> I know we need to be able to pass the initramfs in memory; anything else
> >> we need other than the normal EFI executable entry conditions?
> > 
> > If we're called before ExitBootServices(), no. If we're called after, 
> > we'll need the map from GetMemoryMap(). There's some other things that 
> > we may want to pass, such as option ROMs that we can get from firmware 
> > but which may not otherwise be mapped - I guess those could arguably be 
> > passed in the initramfs.
> > 
> 
> No, we should be called before ExitBootServices(), obviously.
<
> That was a significant part of the point.

I know. But we also have to handle being called after 
ExitBootServices(). There are going to be people who don't want to deal 
with signing their kernel builds.
 
-- 
Matthew Garrett | mjg59@...f.ucam.org
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