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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 D4059C433E0 for ; Thu, 9 Jul 2020 07:32:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A21BA20775 for ; Thu, 9 Jul 2020 07:32:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594279935; bh=osjNtW7Vcsl6XAmexC2cVHsdXszVbxZeargjrRySMuA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=q9Z8bjU+MarTjU9Z3Vk/v6R7Ni/DvA3QUQY23nJ7EbyNcwDNQ2YYPlYyXOohgvxIY I8SkAnWB3GADND/Qt8CgIfnz7jPJDqXwTKor0lrfTjclTTjsBGbwEM86tLxr8wZf4E +IexPzep76tNMe8vDZxXbv2wk5c+bofWmas6iQFc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726311AbgGIHcP (ORCPT ); Thu, 9 Jul 2020 03:32:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:43504 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726184AbgGIHcO (ORCPT ); Thu, 9 Jul 2020 03:32:14 -0400 Received: from localhost (unknown [122.182.251.219]) (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 C24F220767; Thu, 9 Jul 2020 07:32:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594279934; bh=osjNtW7Vcsl6XAmexC2cVHsdXszVbxZeargjrRySMuA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FgM48asAEyYqqo3pNtHvbbzcmAGnCiHesy6730e5O/fCk7lM/Mi80rry/VUTwf9fP iCxgGhQv7KrE3E5FzDK+J74umYvxzhuYbw2wsqKAURVMoT3Xvwa/Bh2wzI0j2DeJog InFdiK7M+/Xf97CQNv+GgyzC6wUOhANqppmEsb/M= Date: Thu, 9 Jul 2020 13:02:04 +0530 From: Vinod Koul To: Bjorn Andersson Cc: Will Deacon , Robin Murphy , Joerg Roedel , Thierry Reding , Laurentiu Tudor , linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Jonathan Marek , linux-arm-msm@vger.kernel.org Subject: Re: [PATCH 4/5] iommu/arm-smmu-qcom: Consstently initialize stream mappings Message-ID: <20200709073204.GH34333@vkoul-mobl> References: <20200709050145.3520931-1-bjorn.andersson@linaro.org> <20200709050145.3520931-5-bjorn.andersson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200709050145.3520931-5-bjorn.andersson@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On 08-07-20, 22:01, Bjorn Andersson wrote: > Firmware that traps writes to S2CR to translate BYPASS into FAULT also > ignores writes of type FAULT. As such booting with "disable_bypass" set > will result in all S2CR registers left as configured by the bootloader. > > This has been seen to result in indeterministic results, as these > mappings might linger and reference context banks that Linux is > reconfiguring. > > Use the fact that BYPASS writes result in FAULT type to force all stream > mappings to FAULT. s/Consstently/Consistently in patch subject -- ~Vinod