Re: [Xen-devel] Start xen on UEFI system with grub

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Nov 01, 2012 at 07:57:30PM +0000, Jan Beulich wrote:
> >>> Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> 11/01/12 4:50 PM >>>
> >On Tue, 11 Sep 2012, Jan Beulich wrote:
> >> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@xxxxxxxxxx> wrote:
> >> > xen.efi not compile when we build xen on Wheezy and probably is not 
> >> > possible boot with lvm volume, fallback options ecc...
> >> 
> >> Just get a suitable tool chain installed then.
> >> 
> >> > UEFI with grub2 seem the best option but with xen hypervisor seem not 
> >> > load efi variable.
> >> 
> >> Sure, because only xen.efi has the code to deal with such.
> >> 
> >> (Btw., I assume you aren't aware that any boot manager
> >> whatsoever, other than the one coming with EFI, is sort of
> >> bogus under EFI?)
> >
> >Unfortunately it looks like more and more people are of the opinion that
> >grub2 is useful even on UEFI firmware.
> >For example, it is pretty clear that Ubuntu is still going to boot Xen
> >via grub2 no matter how the firmware looks like.
> 
> Then they need to be tought how to do it properly, the more that Linux itself
> now is capable of booting without a boot loader (other than the EFI one).
> 
> >What would it take to make Xen work properly with grub2 on a UEFI firmware?
> 
> I can't be that difficult.

I believe the only issue was the check to do the  Multiboot-E820 parsing
before the E801 parsing? Perhaps that has already been done?

> 
> >I think that we should add it as a work item for Xen 4.3.
> 
> If you have someone to do that work. I'm willing to review the resulting
> changes, but I currently don't see me doing anything here (as being totally
> unimportant and - just to repeat that - conceptually wrong).
> 
> Jan
> 

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