Bug#825688: grub-efi-arm: refuses to install to an ext* device

[Ian Campbell]

On Sat, 2016-05-28 at 22:18 +0200, Steinar H. Gunderson wrote:
> Package: grub-efi-arm
> Version: 2.02~beta2-36
> Severity: normal
> 
> Hi,
> 
> grub-install completely refuses to install an EFI GRUB to a /boot/EFI
> that is not on vfat or hfs+ (the C source code has explicit checks).
> However, there's no good reason why, on ARM, /boot/EFI couldn't be on
> ext2/ext3/ext4; U-Boot reads it just fine,

What about actual UEFI firmware? I think in general that won't speak
ext* or anything other than FAT.

The EFI spec mandates a minimal set of filesystems which must be
supported for the ESP (which is what is mounted on /boot/EFI). AIUI
only FAT (and only a specific variant of FAT) is in that set.

Ian.