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

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Message-Id: <5266620602000078000FCA48@nat28.tlf.novell.com>
Date:	Tue, 22 Oct 2013 10:31:18 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"Ian Campbell" <ian.campbell@...rix.com>
Cc:	<ross.philipson@...rix.com>, <stefano.stabellini@...citrix.com>,
	<grub-devel@....org>, <david.woodhouse@...el.com>,
	<richard.l.maliszewski@...el.com>, <xen-devel@...ts.xen.org>,
	<boris.ostrovsky@...cle.com>,
	"Daniel Kiper" <daniel.kiper@...cle.com>, <konrad.wilk@...cle.com>,
	"Peter Jones" <pjones@...hat.com>, <linux-kernel@...r.kernel.org>,
	<keir@....org>
Subject: Re: EFI and multiboot2 devlopment work for Xen

>>> On 22.10.13 at 11:26, Ian Campbell <ian.campbell@...rix.com> wrote:
> AIUI "efilinux" is somewhat badly named and does not use the Linux Boot
> Protocol (i.e. the (b)zImage stuff with real mode entry point) either.
> It actually loads and executes the kernel binary as a PE/COFF executable
> (the native UEFI binary executable format). xen.efi is a PE/COFF binary
> too and could equally well be launched by linuxefi in this way.

Except that unless I'm mistaken "linuxefi" still expects to find certain
Linux-specific internal data structures inside the PE image, which I
don't see us wanting to be emulating. That's the main difference to
"chainloader" afaict.

Jan

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