From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Tue, 6 Dec 2016 12:20:40 +0000 Subject: [PATCH] arm64: Add CMDLINE_EXTEND In-Reply-To: References: <61060b44-64a9-d628-4faf-3a7ae06048aa@infradead.org> <20161205120842.GA14429@e104818-lin.cambridge.arm.com> Message-ID: <20161206122040.GH2498@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Dec 05, 2016 at 09:41:06AM -0800, Geoff Levand wrote: > 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. So why can't you just set that in grub if you want to boot with ACPI? Will