[systemd-devel] [PATCH] systemd: mount the EFI variable filesystem

[Josh Boyer]

On Wed, Oct 31, 2012 at 9:13 AM, Kay Sievers <kay at vrfy.org> wrote:
> On Wed, Oct 31, 2012 at 2:04 PM, Colin Walters <walters at verbum.org> wrote:
>> On Mon, 2012-10-29 at 10:21 +0800, joeyli wrote:
>>
>>> I tested this patch on my UEFI notebook with latest EFI kernel git tree,
>>> the efivarfs mounted normally after system boot and I can delete/add EFI
>>> variable through /sys/firmware/efi/efivars.
>>
>> This causes systemd to output a warning if the kernel doesn't have an
>> efivars module.  I suppose to do this kind of thing "right" we'd
>> have to conditionalize the module loads on available kernel version they
>> first appeared in?
>
> We should probably suppress the warning that the module cannot be
> loaded. And then maybe make the mount conditional, depending on the
> existence of the target directory.
>
> This should make all that only trigger when the kernel module is
> available or it is compiled-in (libkmod tells the same), and do
> nothing on older kernel, kernels without the filesysystem, or
> platforms without EFI.

Yes to all of that.

For those wanting a distro kernel to play with that has this support,
we've included efivarfs in Fedora rawhide and soon in F18.

josh