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Re: EFI and multiboot2 devlopment work for Xen

From: Daniel Kiper
Subject: Re: EFI and multiboot2 devlopment work for Xen
Date: Wed, 23 Oct 2013 09:05:28 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Oct 22, 2013 at 10:54:44AM +0200, Vladimir 'φ-coder/phcoder' Serbinenko 
> 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).

Thanks. Could you send me a pointer to current multiboot2 protocol docs?

> Awaiting for someone to test it to commit

On first sight it looks quite nice. However, as I know Solaris guys
prepared similar solution. I am not sure it was discussed with GRUB2
guys. However, I think that it is worth coordinating both works and
do not break existing solution if it is possible.

I will try to get more details about Solaris implementation.


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