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Re: [PATCH 6/6] gnu: Add grub-efi.
From: |
Marius Bakke |
Subject: |
Re: [PATCH 6/6] gnu: Add grub-efi. |
Date: |
Sun, 18 Dec 2016 15:36:36 +0100 |
User-agent: |
Notmuch/0.23.3 (https://notmuchmail.org) Emacs/25.1.1 (x86_64-unknown-linux-gnu) |
Ludovic Courtès <address@hidden> writes:
>> Relatedly, I think the way to build a 'multi-grub' is to have one
>> expression for each supported grub platform, and then consolidate
>> out/lib/grub from each.
>
> So in essence, GRUB itself supports only one platform at a time?
AFAICT yes. Gentoo works around this by running the build for each
user-specified platform and combining the outputs. Most other distros
just carry separate grub-pc and grub-efi packages.
>>> Now there are things I didn’t quite get. Apparently you’re supposed to
>>> have a /boot/efi as a vfat partition, and ‘grub-install’ is supposed to
>>> detect it and install the EFI stuff, or so I thought (info "(grub)
>>> Installing GRUB using grub-install").
>>>
>>> However, ‘grub-install’ still seems to be installing for “i386-pc”
>>> instead of EFI.
>>>
>>> What am I missing?
>>
>> IIRC grub-install will detect and install for the running mode (pc, efi,
>> etc). So in a classic chicken-and-egg situation, you need to be booted
>> with UEFI mode for grub to select the correct installation platform!
>
> My understanding is that it would install for UEFI if it fines
> /boot/efi or if --efi-directory is passed.
I'm not so sure, but it's been a while since I played around with this.
At least building the 'gnu/system/install.scm' image works fine when
passing --efi-directory (see the bottom two patches from
https://lists.gnu.org/archive/html/guix-devel/2016-12/txtchTym4QVKr.txt ),
and I think it would choose i386-pc even if x86_64-efi was available
since the VM boots in BIOS mode.
Tangentially, I'm not aware of any way to build a "hybrid" ISO image
using only grub. I've started work on packaging syslinux/isolinux which
is what Debian uses for their hybrid UEFI/BIOS install image.
> BTW, as far as I’m concerned, most of the other patches are ready:
>
> https://lists.gnu.org/archive/html/guix-devel/2016-11/msg00303.html
> https://lists.gnu.org/archive/html/guix-devel/2016-11/msg00304.html
>
> Could you push them?
Done.
> The remaining issue is how to run fsck for vfat.
>
> Currently I still have a preference for something like what I suggested
> at:
>
> https://lists.gnu.org/archive/html/guix-devel/2016-12/msg00095.html
>
> Thoughts?
This approach looks better than the one I started working on. It's not
clear to me how to pass the device to these procedures, or how
'check-file-system' will know which checker to use. We should try to
have this in place before 0.13 :-)
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- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/16
- Re: [PATCH 6/6] gnu: Add grub-efi., Danny Milosavljevic, 2016/12/16
- Re: [PATCH 6/6] gnu: Add grub-efi., Marius Bakke, 2016/12/16
- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/18
- Re: [PATCH 6/6] gnu: Add grub-efi.,
Marius Bakke <=
- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/19
- Re: [PATCH 6/6] gnu: Add grub-efi., Marius Bakke, 2016/12/19
- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/19
- Re: [PATCH 6/6] gnu: Add grub-efi., Marius Bakke, 2016/12/19
- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/20
- Re: [PATCH 6/6] gnu: Add grub-efi., Marius Bakke, 2016/12/20
- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/20
- Re: [PATCH 6/6] gnu: Add grub-efi., Marius Bakke, 2016/12/20
- Re: [PATCH 6/6] gnu: Add grub-efi., Ludovic Courtès, 2016/12/21
- Re: [PATCH 6/6] gnu: Add grub-efi., Danny Milosavljevic, 2016/12/21