openbsd and heads

EDIT: Can Heads kexec into BSD?

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original:
ping @tlaurion
Has anyone every gotten OpenBSD with FDE to work with heads?

[tlaurion]

@0rb677 look in closed issues. I think someone did?

[tlaurion]

Current blocker is newer cryptsetup to support newer LUKS2 format, else I think kexec is able to boot kernel and initrd while really unsure.

Edit: really not sure!. No issue in the past sorry for having been misleading on this. It was an issue you opened and closed it because you were able to boot guix finally.

@tlaurion how to force boot full encryption disk with heads?
i need modify /etc/config ? thats all? heads can't boot FDE /w boot

sda                         disk
|__sda1                  part
|______cryptroot    /

[alex-nitrokey]

Full disk encryption does not fit into the concept of heads.

You choose either one of these two. Changes of files in /boot are detected by heads though, so the only disadvantage of choosing heads instead of full disk encryption is minor information leakage (what kernel is in use or similiar).

Thanks @alex-nitrokey :)

[FrostKnight]

This actually interests me as well. I hope this will be possible in the future too. I am no huge hurry, but it would be cool to see in the future when I get my Nitropad.

[tlaurion]

@FrostKnight @0rb677 :
OpenBSD kexec'ing from Linux possible? Answer is no.

You could have it under QubesOS though.

[tlaurion]

If that answers whys not, please close the issue.

[FrostKnight]

I don't completely understand, but then I don't really know what kexec means... maybe I should look it up.
That being said, Hyperbola plans to move to HyperbolaBSD which will be based on OpenBSD but have many changes to it that are more libre. Is there anything that the Hyperbola devs could do that would make it possible to use heads to boot HyperbolaBSD?

[techge]

kexec is a tool to start/change into another linux kernel, thus not for windows, not for BSD or any other non-linux system. This is nothing that is going to be changed by BSD developers and probably nobody else (at least any time soon).

[paulmenzel]

Google Engineers Get Windows Booting When Kexec'ed Under Linux

[techge]

Well... not what one expects if they are talking about "booting into Windows", but nice anyway... in a way...

[tlaurion]

Google Engineers Get Windows Booting When Kexec'ed Under Linux

"The engineers involved have been implementing enough of the EFI Boot Services to be able to kexec Windows from Linux. "

Conference paper going into the details of implementing EFI services into Linuxboot

"LinuxBoot is a firmware for modern servers that replaces specific firmware functionality like the UEFI DXE phase with a Linux kernel and runtime."