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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_MUTT autolearn=ham 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 DADFCECDE42 for ; Thu, 18 Oct 2018 02:06:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9A512083A for ; Thu, 18 Oct 2018 02:06:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9A512083A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727489AbeJRKEy (ORCPT ); Thu, 18 Oct 2018 06:04:54 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:49103 "EHLO smtp2200-217.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727307AbeJRKEy (ORCPT ); Thu, 18 Oct 2018 06:04:54 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.08180991|-1;CH=green;FP=0|0|0|0|0|-1|-1|-1;HT=e01l10423;MF=ren_guo@c-sky.com;NM=1;PH=DS;RN=16;RT=16;SR=0;TI=SMTPD_---.D3i0F6V_1539828369; Received: from localhost(mailfrom:ren_guo@c-sky.com fp:SMTPD_---.D3i0F6V_1539828369) by smtp.aliyun-inc.com(10.147.41.121); Thu, 18 Oct 2018 10:06:09 +0800 Date: Thu, 18 Oct 2018 10:05:54 +0800 From: Guo Ren To: Arnd Bergmann Cc: Andrew Morton , Daniel Lezcano , David Miller , gregkh , Christoph Hellwig , Marc Zyngier , Mark Rutland , Peter Zijlstra , Rob Herring , Thomas Gleixner , Linux Kernel Mailing List , linux-arch , DTML , Rob Herring , c-sky_gcc_upstream@c-sky.com Subject: Re: [PATCH V9 07/21] csky: MMU and page table management Message-ID: <20181018020552.GB12027@guoren-Inspiron-7460> References: <783a90d35138634a1cb899e2c551c96f3b5178af.1539655731.git.ren_guo@c-sky.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 17, 2018 at 05:06:56PM +0200, Arnd Bergmann wrote: > On Tue, Oct 16, 2018 at 5:01 AM Guo Ren wrote: > > > > This patch adds files related to memory management and here is our > > memory-layout: > > > > Fixmap : 0xffc02000 – 0xfffff000 (4 MB - 12KB) > > Pkmap : 0xff800000 – 0xffc00000 (4 MB) > > Vmalloc : 0xf0200000 – 0xff000000 (238 MB) > > Lowmem : 0x80000000 – 0xc0000000 (1GB) > > > > abiv1 CPU (CK610) is VIPT cache and it doesn't support highmem. > > abiv2 CPUs are all PIPT cache and they could support highmem. > > > > Lowmem is directly mapped by msa0 & msa1 reg, and we needn't setup > > memory page table for it. > > > > Link:https://lore.kernel.org/lkml/20180518215548.GH17671@n2100.armlinux.org.uk/ > > Signed-off-by: Guo Ren > > Cc: Christoph Hellwig > > Cc: Arnd Bergmann > > Reviewed-by: Arnd Bergmann > > Christoph had all the useful comments on this one, I just checked that I didn't > spot anything beyond that. Yes, Christoph help a lot and find a critical bug of "sync_dma > 4K". Best Regards Guo Ren