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=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 4E472C433E2 for ; Fri, 11 Sep 2020 08:21:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F403B221E5 for ; Fri, 11 Sep 2020 08:21:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="S4KMg/sB"; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="g1pbyM2m" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725767AbgIKIVx (ORCPT ); Fri, 11 Sep 2020 04:21:53 -0400 Received: from a27-21.smtp-out.us-west-2.amazonses.com ([54.240.27.21]:36166 "EHLO a27-21.smtp-out.us-west-2.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725562AbgIKIVu (ORCPT ); Fri, 11 Sep 2020 04:21:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=zsmsymrwgfyinv5wlfyidntwsjeeldzt; d=codeaurora.org; t=1599812509; h=MIME-Version:Content-Type:Content-Transfer-Encoding:Date:From:To:Cc:Subject:In-Reply-To:References:Message-ID; bh=qsGVIC41HDalGoHN3eDwDtBTI6dMXbAdP5OWRu78vaU=; b=S4KMg/sBG5+tKtKDwGOxV04UnPiTDJWFq5neNbuXlOoFU34SoOhTNI0b9jbPgszq 97YF+ZmNvFmCWv2aUWK52cWdsesmwbfnt4DsG24UJGuuJV3dk7nQjhu562WKjomHoEL LBdfVjEK6MviULaEKJMIQRarKZN+YoEoj2mauCZc= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=hsbnp7p3ensaochzwyq5wwmceodymuwv; d=amazonses.com; t=1599812509; h=MIME-Version:Content-Type:Content-Transfer-Encoding:Date:From:To:Cc:Subject:In-Reply-To:References:Message-ID:Feedback-ID; bh=qsGVIC41HDalGoHN3eDwDtBTI6dMXbAdP5OWRu78vaU=; b=g1pbyM2mGPRzFJW/OOR684lg916DMBY/vyZmakaH1JH1kN/XyTfcbxNufx4ukbET CqINHvMsMmvhc30vOA2YLBkKv8dGByPN6B4iYqGL9I8SLi5Q4Y119zHX/ZOfLxvwfGQ KJ0VN+xU9tvuV/rthW/q1V/uuJ8jSAdVOx/D5vgY= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 11 Sep 2020 08:21:49 +0000 From: Sai Prakash Ranjan To: Bjorn Andersson Cc: Will Deacon , Robin Murphy , Joerg Roedel , Jordan Crouse , Rob Clark , Sibi Sankar , linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: Re: [PATCH v3 3/8] iommu/arm-smmu: Consult context bank allocator for identify domains In-Reply-To: <20200904155513.282067-4-bjorn.andersson@linaro.org> References: <20200904155513.282067-1-bjorn.andersson@linaro.org> <20200904155513.282067-4-bjorn.andersson@linaro.org> Message-ID: <010101747c419fc3-f938605d-df63-4905-b97f-f9077b04ffee-000000@us-west-2.amazonses.com> X-Sender: saiprakash.ranjan@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 X-SES-Outgoing: 2020.09.11-54.240.27.21 Feedback-ID: 1.us-west-2.CZuq2qbDmUIuT3qdvXlRHZZCpfZqZ4GtG9v3VKgRyF0=:AmazonSES Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On 2020-09-04 21:25, Bjorn Andersson wrote: > For implementations of the ARM SMMU where stream mappings of bypass > type > are prohibited identity domains can be implemented by using context > banks with translation disabled. > > Postpone the decision to skip allocating a context bank until the > implementation specific context bank allocator has been consulted and > if > it decides to use a context bank for the identity map, don't enable > translation (i.e. omit ARM_SMMU_SCTLR_M). > > Signed-off-by: Bjorn Andersson > --- > Minor nit in the subject: identify -> identity Reviewed-by: Sai Prakash Ranjan Tested-by: Sai Prakash Ranjan -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation