Re: U-Boot for x86 BIOS systems

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> Am 21.05.2023 um 16:06 schrieb Neal Gompa <ngompa13@xxxxxxxxx>:
> 
> On Sun, May 21, 2023 at 9:58 AM Peter Boy <pboy@xxxxxxxxxxxxx> wrote:
>> 
>> 
>> 
>> Am 21.05.2023 um 15:36 schrieb Neal Gompa <ngompa13@xxxxxxxxx>:
>> 
>> Hey all,
>> 
>> I was chatting with Marcin Juszkiewicz about U-Boot on ARM wrt its
>> "generic UEFI boot" feature where it can execute UEFI applications. We
>> use this capability for Fedora on ARM platforms to go from the utterly
>> barebones and weird initialization processes for various boards to a
>> UEFI-like environment so we can boot Fedora somewhat normally.
>> 
>> It occurred to me during that conversation that it might be possible
>> to use this to simplify what we need to care about for x86 too. Last
>> year, the Red Hat Bootloader team wanted to start a deprecation
>> process for BIOS[1] and the Fedora Cloud WG has been interested in it
>> for longer[2].
>> 
>> At least from the Cloud WG side, it's been determined that completely
>> removing BIOS support is functionally impossible for the next few
>> years because of AWS and smaller cloud providers not universally
>> supporting UEFI (and we are still trying to convince them to change
>> their minds on this...). And I still have plenty of hardware with
>> broken UEFI implementations that require CSM boot to support Linux.
>> 
>> But could we use U-Boot to fill in this gap so these systems still
>> work? We'd then treat x86 like ARM (if no UEFI, use U-Boot UEFI).
>> 
>> 
>> [1]: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/thread/K5YKCQU3YVCTMSBHLP4AOQWIE3AHWCKC/
>> [2]: https://pagure.io/cloud-sig/issue/345
>> 
>> 
>> 
>> Would be interesting to have a proof of concept, e.g. a server VM image.
>> 
>> However, when I look at the ARM SBC UEFI, some improvement would be desirable. At the moment, there is only a crumpled UEFI image flying across the screen, without any intervention option (which is OK for SBC, but probably not for a „real“ server).
>> 
> 
> U-Boot does have a UEFI shell, though for our purposes, it's not that
> important. U-Boot would merely allow us to jump into an environment
> that executes the boot manager EFI binary (grub2, rEFInd, sd-boot).
> 
> If it's possible, it's something Fedora Cloud would probably adopt
> pretty quickly.


I'm curios. I would like to grab it and try to create an experimental Server VM.


--
Peter Boy
https://fedoraproject.org/wiki/User:Pboy
PBoy@xxxxxxxxxxxxxxxxx

Timezone: CET (UTC+1) / CEST /UTC+2)

Fedora Server Edition Working Group member
Fedora Docs team contributor and board member
Java developer and enthusiast


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