Subject: Re: [parted-devel] [PATCH RESEND] GPT: add support for PReP GUID

From: Avik Sil <[email-masked]>
Date: Tue, 08 Oct 2013 06:42:28 +0530

On 10/07/2013 07:59 PM, Phillip Susi wrote:
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> On 10/7/2013 2:21 AM, Avik Sil wrote:
>> From: Daniel Battaiola Kreling <[email-masked]>
>>
>> PReP (PowerPC Reference Platform) boot partition is the first
>> partition used in PowerPC platform for containing the bootable
>> kernel or bootloader. The firmware searches for this partition and
>> jumps to it for booting. So far no GUID was specified for this
>> partition type and hence booting from GPT disk was not supported on
>> this platform. A new GUID 9e1a2d38-c612-4316-aa26-8b49521e5a8b for 
>> PReP partition is proposed to be included in GPT.
> 
> Doesn't this old platform only understand the apple partition map, and
> not gpt?  Picking a guid out of the air isn't going to teach the
> firmware to look for it.
> 
Yes, and firmware support for it is also being added. For example, in
guest firmware SLOF, this support has already been added [1]. And GRUB2
also now supports PReP GUID [2].

Regards,
Avik

[1]
https://github.com/aik/SLOF/commit/0ee161892795db614d3bb9c59fc999cc79898b11
[2] http://bzr.savannah.gnu.org/lh/grub/trunk/grub/revision/5190

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