linux-kernel - Re: EFI and multiboot2 devlopment work for Xen

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Message-ID: <20131021135437.GD1283@fenchurch.internal.datastacks.com>
Date:	Mon, 21 Oct 2013 09:54:38 -0400
From:	Peter Jones <pjones@...hat.com>
To:	Daniel Kiper <daniel.kiper@...cle.com>
Cc:	boris.ostrovsky@...cle.com, david.woodhouse@...el.com,
	ian.campbell@...rix.com, jbeulich@...e.com, keir@....org,
	konrad.wilk@...cle.com, richard.l.maliszewski@...el.com,
	ross.philipson@...rix.com, stefano.stabellini@...citrix.com,
	xen-devel@...ts.xen.org, grub-devel@....org,
	linux-kernel@...r.kernel.org
Subject: Re: EFI and multiboot2 devlopment work for Xen

On Mon, Oct 21, 2013 at 02:57:56PM +0200, Daniel Kiper wrote:
> Hi,
> 
> During work on multiboot2 protocol support for Xen it was discovered
> that memory map passed via relevant tag could not represent wide range
> of memory types available on EFI platforms. Additionally, GRUB2
> implementation calls ExitBootServices() on them just before jumping
> into loaded image. In this situation loaded system could not clearly
> identify reserved memory regions, EFI runtime services regions and others.

I think you'll find that many distros are shipping patches to grub2 to
add a "linuxefi" command that starts the kernel through its EFISTUB
code.  You may want to look in to that.

-- 
        Peter
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