Bug#783990: efivarfs is a separate fs and needs moutning

Thorsten Glaser t.glaser at tarent.de
Fri Jul 16 14:53:14 BST 2021

On Fri, 16 Jul 2021, Ian Jackson wrote:

> but the suggestion by Greg Pearson is correct and IMO should be
> applied to mountkernfs.

This is not as easy as it sounds:

tglase at tglase-nb:~ $ sudo mount -t efivarfs efivarfs /sys/firmware/efi/efivars
mount: /sys/firmware/efi/efivars: mount point does not exist.
32|tglase at tglase-nb:~ $ sudo mkdir -p /sys/firmware/efi/efivars
mkdir: cannot create directory ‘/sys/firmware/efi’: Operation not permitted

This is on amd64 without EFI (classical BIOS, no CSM).

Nōn-{x86,ARM} systems will likely have the same. Don’t break them.

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