Received: by 2002:a05:6a10:22f:0:0:0:0 with SMTP id 15csp3098744pxk; Tue, 15 Sep 2020 10:00:59 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyZctX1xW5drIvtukj4/L0BQWjmhZY6lyV/ok279/5HfR8X4odXU3E0WABKPo6jqaeFh4KH X-Received: by 2002:a17:906:354c:: with SMTP id s12mr21714853eja.370.1600189259687; Tue, 15 Sep 2020 10:00:59 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1600189259; cv=none; d=google.com; s=arc-20160816; b=Qh0n/yanR83z1Sc3v8WOJ8fj1TmzDPfppBDmyKatyyJkHGeia3oLyC0oHlkdE3yQRb O9svqjWX3cxDTBdrqY4QStvtfR0494ExFer+0j6djVrq+liFGx7F59XBwC5L5lR3nqZ2 +q+rnwzIb0kF+3WZV4E4gJ1qcXtDnNhcid2CmIPMtRh2bVedFHCArsnv7dwzhJRIcbHd WkWczl3prW8KhXImhOZj+Vf9UIDhCGmyyTaV/Q3BJBcbHWZGXYFqIctrrS7C+KqITDZy /kJ+RIoGxLan+W1dUTXIgBA0YlIuQTg1cUz9+p+0WKKmRba8HZC3/CqPPVHSpYHQQXDc D8cg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=krk6vAvdqRuePTGhJZaWopiP+kVGEHXGNcMdzkubCIo=; b=BwgkHXyCAWCb5w3wWW5eGl/SJnwCWu9kumD81Vs1g3tZh36pUx8KDK/4RJcbx98L/y IIG0MwTSEqW3exGF8j1MQlsaZUIRl1jTPq1WxtMfCr7vpE/cOYG3n1oTOxpmOZk5+Qlm hJ4eUnBJPL/e0LTY1AjbASuDmZjlLbNhetLa5ow0J45Jsb/EZFU6HIbUTUZQUI67IjmY r0k3F2Psgual6d44XSRu2Og5WqdBy5BabT+E1fI1RsxGHp8TqhzzlkVBvxVHHq3Wzv5l mxikV0iQ2Lpx4uV2BoaPq3A27ePBDwtafPJA+isemFO12oDWgb6XET0KfYuTbdbIPKrU tf8g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id dr18si9726206ejc.702.2020.09.15.10.00.36; Tue, 15 Sep 2020 10:00:59 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727762AbgIOQzx (ORCPT + 99 others); Tue, 15 Sep 2020 12:55:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:58116 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727586AbgIOQPo (ORCPT ); Tue, 15 Sep 2020 12:15:44 -0400 Received: from gaia (unknown [46.69.195.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E0FD621D7B; Tue, 15 Sep 2020 16:13:46 +0000 (UTC) Date: Tue, 15 Sep 2020 17:13:44 +0100 From: Catalin Marinas To: Phil Chang Cc: linux-arm-kernel@lists.infradead.org, Jonathan Corbet , Will Deacon , Mauro Carvalho Chehab , Mark Rutland , Anshuman Khandual , YJ Chiang , Alix Wu , Mike Rapoport , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org Subject: Re: [PATCH] [PATCH] ARM64: Setup DMA32 zone size by bootargs Message-ID: <20200915161344.GD14908@gaia> References: <20200915150855.24825-1-phil.chang@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200915150855.24825-1-phil.chang@mediatek.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 15, 2020 at 11:08:55PM +0800, Phil Chang wrote: > Allowing the DMA32 zone be configurable in ARM64 but at most 4Gb. Why? What is your use-case? -- Catalin