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Re: EFI and multiboot2 devlopment work for Xen

From: Seth Goldberg
Subject: Re: EFI and multiboot2 devlopment work for Xen
Date: Mon, 21 Oct 2013 14:27:57 -0700 (PDT)
User-agent: Alpine 2.00 (GSO 1167 2008-08-23)

Quoting Vladimir 'φ-coder/phcoder' Serbinenko, who wrote the following on...:

On 21.10.2013 22:53, Seth Goldberg wrote:

Quoting Daniel Kiper, who wrote the following on Mon, 21 Oct 2013:


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

  Yes, that is exactly why we added full support to pass the entire UEFI
memory map via a new tag.

Can you send this patch? Or provide a link to publically available
source? I think we can accept it with probably just minor changes.

  Sure :).  Just as an FYI, the changes are available in one of the zips from:

(their size is rather comical of course, but only because they include ALL FOSS source shipped with Solaris 11.1).

I'll try to isolate that change and base it against the current trunk. We may need to change the tag id, as I ended up using an OEM-specific number for it; I didn't want to conflict with new tags.


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