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=-8.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 95F42C433E2 for ; Mon, 13 Jul 2020 19:03:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A4BB2067D for ; Mon, 13 Jul 2020 19:03:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594667020; bh=ERBn/pr30RWxSObAL8l85+l8FNMMvON1Mype8up0/AU=; h=Date:From:To:Subject:References:In-Reply-To:List-ID:From; b=CNXnbm+9w2dImV1Mlk9dhBJ8y2p4TYbD/3AEWRystAEycmKl+IR5VbV6PwGojjzUb jZwuVGzCrT7B4wZVK8gQa9fkk4efkC8hCFO4HHhz7HRkW4uxy4Rq4V4m9KaORhMGWJ fPi3BKzNfU7c8oFWlovMrB6lJ2uxEIBX3WScIiiY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726947AbgGMTDj (ORCPT ); Mon, 13 Jul 2020 15:03:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:41744 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726894AbgGMTDi (ORCPT ); Mon, 13 Jul 2020 15:03:38 -0400 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (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 546AB2076D; Mon, 13 Jul 2020 19:03:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594667017; bh=ERBn/pr30RWxSObAL8l85+l8FNMMvON1Mype8up0/AU=; h=Date:From:To:Subject:References:In-Reply-To:From; b=ZRkkfyHleaBZp0Vfs5JuTH7gBkWzJb7TMWx0WfrKq+JjCqOf1Cx7Ql0CUe4pWmfLI 1kkyv0RegppAo0t0BoBRlbfvvgEAp01WhxSclT1eANlzJBCgTY/hSn6fOeJh7PLkN5 PGkqMoZ8H4S5VF0WBd+pUcrT6irlu//cQU3Ak/MI= Date: Mon, 13 Jul 2020 20:03:32 +0100 From: Will Deacon To: linux-arm-msm@vger.kernel.org, Joerg Roedel , Robin Murphy , freedreno@lists.freedesktop.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] iommu/arm-smmu: Add a init_context_bank implementation hook Message-ID: <20200713190331.GA3444@willie-the-truck> References: <20200611223656.4724-1-jcrouse@codeaurora.org> <20200713151123.GB3072@willie-the-truck> <20200713170032.GH21059@jcrouse1-lnx.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200713170032.GH21059@jcrouse1-lnx.qualcomm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 13, 2020 at 11:00:32AM -0600, Jordan Crouse wrote: > On Mon, Jul 13, 2020 at 04:11:23PM +0100, Will Deacon wrote: > > On Thu, Jun 11, 2020 at 04:36:56PM -0600, Jordan Crouse wrote: > > > Add a new implementation hook to allow the implementation specific code > > > to tweek the context bank configuration just before it gets written. > > > The first user will be the Adreno GPU implementation to turn on > > > SCTLR.HUPCF to ensure that a page fault doesn't terminating pending > > > transactions. Doing so could hang the GPU if one of the terminated > > > transactions is a CP read. > > > > > > This depends on the arm-smmu adreno SMMU implementation [1]. > > > > > > [1] https://patchwork.kernel.org/patch/11600943/ > > > > > > Signed-off-by: Jordan Crouse > > > --- > > > > > > drivers/iommu/arm-smmu-qcom.c | 13 +++++++++++++ > > > drivers/iommu/arm-smmu.c | 28 +++++++++++++--------------- > > > drivers/iommu/arm-smmu.h | 11 +++++++++++ > > > 3 files changed, 37 insertions(+), 15 deletions(-) > > > > This looks straightforward enough, but I don't want to merge this without > > a user and Sai's series has open questions afaict. > > Not sure what you mean by a user in this context? > Are you referring to https://patchwork.kernel.org/patch/11628541/? Right, this post was just a single patch in isolation, whereas it was reposted over at: https://lore.kernel.org/r/cdcc6a1c95a84e774790389dc8b3b7feeee490dc.1593344119.git.saiprakash.ranjan@codeaurora.org so I'll ignore this one. Sorry, I'm just really struggling to keep track of what is targetting 5.9, and I don't have tonnes of time to sift through the backlog of duplicate postings :( Will