[PATCH 2/2] efi_loader: make the UEFI boot manager configurable

[Heinrich Schuchardt]

On 1/15/21 7:43 PM, Tom Rini wrote:
> On Fri, Jan 15, 2021 at 07:02:50PM +0100, Heinrich Schuchardt wrote:
>
>> Some boards are very tight on the binary size. Booting via UEFI is possible
>> without using the boot manager.
>
> While I don't think we need to re-word this part, for the record my
> concern is global, not specific platforms.  To re-iterate something we
> talked about on IRC, I think it's important to be able to select and
> have a default UEFI implementation that covers as many common use cases
> as possible, while also being as small as possible.
>
>>
>> Provide a configuration option to make the boot manager available.
>>
>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> [snip]
>> +config CMD_BOOTEFI_BOOTMGR
>> +	bool "UEFI Boot Manager"
>> +	default y
>> +	help
>> +	  Select this option if you want to select the UEFI binary to be booted
>> +	  via UEFI variables Boot####, BootOrder, and BootNext. This enables the
>> +	  'bootefi bootmgr' command.
>
> I'm not sure this should be default y.  My concern is that the default
> set of options is growing so that every possible case has support in the
> binary but the hardware and practical use means we don't need all of
> that.  This should perhaps be "default y if DISTRO_DEFAULTS" at least.

If you want to default something to no, I think that
EFI_UNICODE_CAPITALIZATION is a better candidate.

On wandboard_defconfig:

683976 - 680228 = 3748 bytes saved.

Best regards

Heinrich

>