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

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Date:	Mon, 28 Oct 2013 12:26:03 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"Vladimir 'φ-coder/phcoder' Serbinenko" 
	<phcoder@...il.com>, seth.goldberg@...cle.com
Cc:	The development of GNU GRUB <grub-devel@....org>,
	Daniel Kiper <daniel.kiper@...cle.com>,
	boris.ostrovsky@...cle.com, david.woodhouse@...el.com,
	ian.campbell@...rix.com, jbeulich@...e.com, keir@....org,
	pjones@...hat.com, richard.l.maliszewski@...el.com,
	ross.philipson@...rix.com, stefano.stabellini@...citrix.com,
	xen-devel@...ts.xen.org, linux-kernel@...r.kernel.org
Subject: Re: EFI and multiboot2 devlopment work for Xen

On Tue, Oct 22, 2013 at 10:54:44AM +0200, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> On 21.10.2013 23:16, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> > Mail is big, I think I got your essential points but I didn't read it whole.
> > On 21.10.2013 14:57, 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.
> >>
> > Will a multiboot2 tag with whole EFI memory map solve your problem?
> I added such a tag in documentation and wrote a patch for it (attached).
> Awaiting for someone to test it to commit

Great! I think from Xen perspective we first need to have Xen be able
to understand multiboot2 - that is something Daniel had been working on.
I will let Daniel talk more about it.

Seth, would you have any time to test the patch against Solaris to
make sure it works?

Thanks!
> 





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