[PATCH] arm64: Add CMDLINE_EXTEND

[Geoff Levand]

Hi Catalin,

On 12/05/2016 04:08 AM, Catalin Marinas wrote:
> On Fri, Dec 02, 2016 at 02:17:02PM -0800, Geoff Levand wrote:
>> The device tree code already supports CMDLINE_EXTEND,
>> so add the config option to make it available on arm64.
> 
> What's your use-case for this patch? Note that both CMDLINE_FORCE and
> CMDLINE_EXTEND (if we introduce it) are ignored by the EFI stub.
> However, we don't seem to have stated this anywhere.

I use this in CoreOS, where we need to set "acpi=force" for
arm64.  CoreOS uses a proper UEFI + grub.

See: 

  https://github.com/coreos/scripts/pull/610
  https://github.com/coreos/coreos-overlay/pull/2298

I can add a comment for EFI stub, either in the Kconfig
options, and/or in Documentation/efi-stub.txt.  Just let
me know.

-Geoff