From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933445Ab1KIAYr (ORCPT ); Tue, 8 Nov 2011 19:24:47 -0500 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:50421 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754536Ab1KIAYq (ORCPT ); Tue, 8 Nov 2011 19:24:46 -0500 Date: Wed, 9 Nov 2011 00:24:37 +0000 From: Will Deacon To: Nicolas Pitre Cc: Catalin Marinas , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v8 15/16] ARM: LPAE: add support for ATAG_MEM64 Message-ID: <20111109002437.GA5256@mudshark.cambridge.arm.com> References: <1320682618-1182-1-git-send-email-catalin.marinas@arm.com> <1320682618-1182-16-git-send-email-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Nicolas, On Tue, Nov 08, 2011 at 11:38:12PM +0000, Nicolas Pitre wrote: > On Mon, 7 Nov 2011, Catalin Marinas wrote: > > > From: Will Deacon > > > > LPAE provides support for memory banks with physical addresses of up > > to 40 bits. > > > > This patch adds a new atag, ATAG_MEM64, so that the Kernel can be > > informed about memory that exists above the 4GB boundary. > > > > Signed-off-by: Will Deacon > > Signed-off-by: Catalin Marinas > > NAK. Any LPAE capable platform to come is, by definition, a new > platform. It therefore should be using DT upfront. Ok, well in that case it's a simple matter of defining #address-cells correctly in your .dts and we can simply drop this patch. Does that sound like the right approach? Will