Re: [PATCH v2 00/23] x86: multiboot2 protocol support

[PGNet Dev <pgnet.dev@gmail.com>]

On 10/30/2015 10:29 AM, Daniel Kiper wrote:
>> Will the aforementioned goals enable direct boot using systemd-boot
>> on EFI platforms ?  Or is it possible even now?
>
> If it supports multiboot2 with my extensions then it should work.
> However, I do not think it is true because all is in development
> state and nothing is set in stone. I am going to release next version
> of my patches in November. I hope then we will be able to establish
> main things and maybe it will be later sucked by systemd-boot. I think
> that you should ask systemd-boot guys what they think about that.

fwiw, from #systemd IRC

	Q: does/will systemd-boot work to boot Xen Dom0?
	A: systemd-boot will boot anything that's an EFI program
	Q: that's to mean, any EFI executable on the EFI partition?
	A: yes. apparently that includes Xen itself, according to
	   https://wiki.archlinux.org/index.php/Xen#With_UEFI_support
	   "cp /usr/lib/efi/xen-4.4.0.efi /boot"
	   that's not the dom0 however, that's just the hypervisor
	   so the question is, how the hypervisor loads dom0
	   ...
	   if you copy xen-x.y.z.efi as /boot/EFI/Boot/BOOTX64.EFI it'll be 
booted by UEFI by default
	   you don't even need gummiboot/sd-boot
	   or you could `efibootmgr` it into your native UEFI boot menu
	   I never used xen, but it seems to read xen.cfg and load dom0 itself, 
which is just fine


which, IIUC, is "probably should ... sort of".

I suspect wait and see is called for.

I'm hoping the Xen-on-UEFI work you're doing helps to smooth out the 
boot process.

Thanks.