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

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Date:	Mon, 28 Oct 2013 11:42:45 -0700 (PDT)
From:	Seth Goldberg <seth.goldberg@...cle.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
cc:	"Vladimir 'φ-coder/phcoder' Serbinenko" 
	<phcoder@...il.com>, seth.goldberg@...cle.com,
	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

Hi,

Quoting Konrad Rzeszutek Wilk, who wrote the following on Mon, 28 Oct 2013:

> 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?

   I'd love to, yes.  I'm just a bit short on time this week.

  Thanks,
  --S