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Mon, 13 Jul 2020 19:13:15 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3FCD0C43395; Mon, 13 Jul 2020 19:13:15 +0000 (UTC) Received: from jcrouse1-lnx.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jcrouse) by smtp.codeaurora.org (Postfix) with ESMTPSA id C4B6FC433C8; Mon, 13 Jul 2020 19:13:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C4B6FC433C8 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=jcrouse@codeaurora.org Date: Mon, 13 Jul 2020 13:13:10 -0600 From: Jordan Crouse To: Will Deacon Subject: Re: [Freedreno] [PATCH] iommu/arm-smmu: Add a init_context_bank implementation hook Message-ID: <20200713191310.GD3815@jcrouse1-lnx.qualcomm.com> Mail-Followup-To: Will Deacon , 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 References: <20200611223656.4724-1-jcrouse@codeaurora.org> <20200713151123.GB3072@willie-the-truck> <20200713170032.GH21059@jcrouse1-lnx.qualcomm.com> <20200713190331.GA3444@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200713190331.GA3444@willie-the-truck> User-Agent: Mutt/1.5.24 (2015-08-30) Cc: linux-arm-msm@vger.kernel.org, Robin Murphy , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, freedreno@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Mon, Jul 13, 2020 at 08:03:32PM +0100, Will Deacon wrote: > 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 :( Yeah, that is our fault. There are too many cooks in the kitchen. We need to pick either system cache or split pagetable and serialize the other on top of it to get the impl code going and then build from there. This particular patch can happily hang out in the background until the rest is resolved. Jordan > Will > _______________________________________________ > Freedreno mailing list > Freedreno@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/freedreno -- The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu