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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: Wed, 23 Oct 2013 01:28:40 -0700

> On Oct 23, 2013, at 12:05 AM, Daniel Kiper <address@hidden> wrote:
>> 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).
> 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.

  It's compatible.  Vladimir based this change on the changes we made; we just 
need to test to verify.


> Daniel
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