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=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 12FD7C2BB1D for ; Mon, 16 Mar 2020 15:39:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE15D20663 for ; Mon, 16 Mar 2020 15:39:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731671AbgCPPjK (ORCPT ); Mon, 16 Mar 2020 11:39:10 -0400 Received: from elvis.franken.de ([193.175.24.41]:44978 "EHLO elvis.franken.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731505AbgCPPjJ (ORCPT ); Mon, 16 Mar 2020 11:39:09 -0400 Received: from uucp (helo=alpha) by elvis.franken.de with local-bsmtp (Exim 3.36 #1) id 1jDrpX-0008Kq-00; Mon, 16 Mar 2020 16:39:03 +0100 Received: by alpha.franken.de (Postfix, from userid 1000) id CF651C1079; Mon, 16 Mar 2020 16:31:08 +0100 (CET) Date: Mon, 16 Mar 2020 16:31:08 +0100 From: Thomas Bogendoerfer To: Kamal Dasu Cc: Florian Fainelli , linux-mips@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Ralf Baechle , Paul Burton , James Hogan , Jiaxun Yang , Huacai Chen , Mike Rapoport , linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] MIPS: c-r4k: Invalidate BMIPS5000 ZSCM prefetch lines Message-ID: <20200316153108.GA13674@alpha.franken.de> References: <20200311214432.GA5900@alpha.franken.de> <2388CCC9-8C2A-4907-988D-7A239DE0DD6C@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2388CCC9-8C2A-4907-988D-7A239DE0DD6C@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 12, 2020 at 11:09:35PM -0400, Kamal Dasu wrote: > This is needed on dma reads from device. ok. > > On Mar 11, 2020, at 5:44 PM, Thomas Bogendoerfer wrote: > > > > On Wed, Mar 11, 2020 at 01:54:23PM -0700, Florian Fainelli wrote: > >>> On 2/7/20 2:33 PM, Kamal Dasu wrote: > >>> Zephyr secondary cache is 256KB, 128B lines. 32B sectors. A secondary cache > >>> line can contain two instruction cache lines (64B), or four data cache > >>> lines (32B). Hardware prefetch Cache detects stream access, and prefetches > >>> ahead of processor access. Add support to invalidate BMIPS5000 cpu zephyr > >>> secondary cache module (ZSCM) on DMA from device so that data returned is > >>> coherent during DMA read operations. > >>> > >>> Signed-off-by: Kamal Dasu Applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]