Re: passing options to grub in xen,openfirmware and efi

[Andrei Borzenkov]

On Mon, May 11, 2015 at 12:36 PM, Olaf Hering <address@hidden> wrote:
> On Fri, May 08, Andrei Borzenkov wrote:
>
>> On Fri, May 8, 2015 at 2:15 PM, Olaf Hering <address@hidden> wrote:
>> > On Fri, May 08, Vladimir 'phcoder' Serbinenko wrote:
>> >
>> >> That's not the plan which is pushed by xen guys. They propose to make grub
>> >> stored on dom0 to just load grub from a predefined place in domU. This 
>> >> I.a.
>> >> allows easier upgrade of bootloader for distros as they don't have to 
>> >> worry
>> >> about dom0 having very old grub.
>> > Thats news, where was that proposed and discussed?
>> http://xenbits.xen.org/docs/unstable/misc/x86-xenpv-bootloader.html
>
> Where is that implemented anyway?

I do not think it is right now. I also do not really know what is the
status of this proposal. Still this two stage approach look more
interesting as it gives domU admin full control over boot loader to
use.

SUSE could be the first :)

>                                                            I fail to find 
> code for that in grub2
> sources. But as noted elsewhere, this is within the guest. Nothing would
> load binaries from the suggested location. And there can be several
> disks, each containing the suggested layout. Its still up to the host
> admin to start a guest with a given kernel= and extra= from domU.cfg.
>
> But without changes such as
> <address@hidden> it will be impossible
> for the host admin to load files from a specific disk (be it a disk or a
> cdrom). Imagine your PC without the BIOS provided boot menu behind F12
> (or whereever), everything would need to go to the first disk.
>
> Olaf
>
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