Re: strange grub error on ARM64

[Daniel Kiper]

Adding Gary and Michael...

Gary, Michael, could you help with this? Or at least forward this email
to folks who may help...

Daniel

On Mon, Mar 06, 2023 at 10:56:52AM -0800, Atish Patra wrote:
> Hi,
> I am working on a cross-architecture cleanup series that removes the
> arch specific headers from RISC-V, ARM, ARM64 and unifies the linux
> loader on ARM64 & Linux.
>
> The v7 version can be found here.
> https://lists.gnu.org/archive/html/grub-devel/2023-02/msg00046.html
>
> It had a few bugs which are fixed and can be found here.
>
> Here are the patches
> https://github.com/atishp04/grub/commits/riscv_uefi_v8
>
> Anybody with ARM64 and/or test setup: Can you please do a quick test
> to see if you see similar or any other failure ?
>
> I noticed a very strange error during ARM64 testing. I have probably
> done something stupid during the grub build
> as I can reproduce this with upstream grub as well.
>
> I was trying to boot an OpenSuse image in qemu virt machine for ARM64 as per
> the instructions[1]. The stock grub image works fine however my custom
> build fails to boot
> and drops to the grub command line. It seems the grub detects the disk
> but doesn't read the root partition correctly on my cross-compiled image.
> It has one additional directory ("@") which I don't see when I mount
> the disk. it doesn't list any files as well.
> ============= Cross compiled grub image =====================
> grub> ls -l (hd0,gpt3)/
> DIR          20230302080325 @/
>
> grub> ls -l (hd0,gpt3)/@/
> DIR          20230302080326 boot/
> DIR         srv/
> DIR          20230302080326 usr/
> DIR         opt/
> DIR          20230302080326 home/
> DIR         var/
> DIR         tmp/
> DIR         root/
>
> grub> ls -l (hd0,gpt3)/@/boot/
> DIR          20230302080326 grub2/
>
> grub>
> ============= Stock grub image from the OpenSuse image=====================
> grub> ls (hd0,gpt3)/
> dev/ run/ boot/ config.partids lib sbin srv/ usr/ opt/ config.bootoptions 
> lib64
> .snapshots/ bin home/ etc/ var/ tmp/ sys/ mnt/ proc/ root/
>
> The same build steps works fine for RISC-V for OpenSuse image though.
> However, I couldn't figure out what it was. Any help is appreciated.
>
> [1] https://en.opensuse.org/openSUSE:AArch64
>
> --
> Regards,
> Atish