From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CD5AC18E5B for ; Wed, 25 Mar 2020 09:05:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D43B620663 for ; Wed, 25 Mar 2020 09:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727360AbgCYJFO (ORCPT ); Wed, 25 Mar 2020 05:05:14 -0400 Received: from pio-pvt-msa1.bahnhof.se ([79.136.2.40]:46006 "EHLO pio-pvt-msa1.bahnhof.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726276AbgCYJFO (ORCPT ); Wed, 25 Mar 2020 05:05:14 -0400 X-Greylist: delayed 586 seconds by postgrey-1.27 at vger.kernel.org; Wed, 25 Mar 2020 05:05:13 EDT Received: from localhost (localhost [127.0.0.1]) by pio-pvt-msa1.bahnhof.se (Postfix) with ESMTP id 46C883F226; Wed, 25 Mar 2020 09:55:26 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at bahnhof.se Received: from pio-pvt-msa1.bahnhof.se ([127.0.0.1]) by localhost (pio-pvt-msa1.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2m8-KGu0_NoS; Wed, 25 Mar 2020 09:55:25 +0100 (CET) Received: from localhost (h-41-252.A163.priv.bahnhof.se [46.59.41.252]) (Authenticated sender: mb547485) by pio-pvt-msa1.bahnhof.se (Postfix) with ESMTPA id DBF2E3F398; Wed, 25 Mar 2020 09:55:24 +0100 (CET) Date: Wed, 25 Mar 2020 09:55:24 +0100 From: Fredrik Noring To: Christoph Hellwig Cc: "Maciej W. Rozycki" , Thomas Bogendoerfer , linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/6] MIPS: remove cpu_has_64bit_gp_regs and cpu_has_64bit_addresses Message-ID: <20200325085524.GA28706@sx9> References: <20200324161525.754181-1-hch@lst.de> <20200324161525.754181-2-hch@lst.de> <20200325083012.GA21605@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200325083012.GA21605@lst.de> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org > The only use of cpu_has_64bit_addresses is the choice of the ioremap > code base. Which ioremap code does the R5900 want to use? If it > doesn't match CONFIG_64BIT having a config option for the ioremap > implementation seems much more sensible, and can be added with the > R5900 patch set (do you have a link to it?). I suppose this would be relevant for the n32 ABI, but initially we only have o32 for the R5900. The (slightly outdated) patch series under review is available here: https://lore.kernel.org/linux-mips/cover.1567326213.git.noring@nocrew.org/T/ Regarding cpu_has_64bit_gp_regs: another unusual aspect of the R5900 is its 128-bit GPRs. :) Fredrik