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Thu, 27 Feb 2020 18:45:41 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6CF1AC447A4; Thu, 27 Feb 2020 18:45:41 +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 83C15C433A2; Thu, 27 Feb 2020 18:45:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 83C15C433A2 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: Thu, 27 Feb 2020 11:45:34 -0700 From: Jordan Crouse To: iommu@lists.linux-foundation.org Subject: Re: [Freedreno] [PATCH v5 0/5] iommu/arm-smmu: Split pagetable support for arm-smmu-v2 Message-ID: <20200227184534.GA25772@jcrouse1-lnx.qualcomm.com> Mail-Followup-To: iommu@lists.linux-foundation.org, Jeffrey Hugo , David Airlie , dri-devel@lists.freedesktop.org, Bjorn Andersson , AngeloGioacchino Del Regno , Sam Ravnborg , Wen Yang , will@kernel.org, Joerg Roedel , Ben Dooks , linux-arm-kernel@lists.infradead.org, Wambui Karuga , freedreno@lists.freedesktop.org, Fritz Koenig , linux-arm-msm@vger.kernel.org, Sharat Masetty , Jeykumar Sankaran , Alexios Zavras , Thomas Gleixner , Sean Paul , Allison Randal , Enrico Weigelt , Greg Kroah-Hartman , Douglas Anderson , linux-kernel@vger.kernel.org, zhengbin , Rob Clark , Daniel Vetter , Drew Davenport , Brian Masney , robin.murphy@arm.com, Georgi Djakov References: <1580248819-12644-1-git-send-email-jcrouse@codeaurora.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1580248819-12644-1-git-send-email-jcrouse@codeaurora.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200227_104543_730931_56E69976 X-CRM114-Status: GOOD ( 23.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jeffrey Hugo , David Airlie , dri-devel@lists.freedesktop.org, Bjorn Andersson , AngeloGioacchino Del Regno , will@kernel.org, Jeykumar Sankaran , Sam Ravnborg , Joerg Roedel , Wen Yang , Ben Dooks , linux-arm-kernel@lists.infradead.org, Wambui Karuga , Fritz Koenig , linux-arm-msm@vger.kernel.org, Sharat Masetty , robin.murphy@arm.com, Alexios Zavras , Thomas Gleixner , Sean Paul , Allison Randal , Enrico Weigelt , Douglas Anderson , linux-kernel@vger.kernel.org, zhengbin , Rob Clark , Daniel Vetter , Greg Kroah-Hartman , Drew Davenport , Brian Masney , freedreno@lists.freedesktop.org, Georgi Djakov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jan 28, 2020 at 03:00:14PM -0700, Jordan Crouse wrote: > This is another iteration for the split pagetable support based on the > suggestions from Robin and Will [1]. > > Background: In order to support per-context pagetables the GPU needs to enable > split tables so that we can store global buffers in the TTBR1 space leaving the > GPU free to program the TTBR0 register with the address of a context specific > pagetable. > > If the DOMAIN_ATTR_SPLIT_TABLES attribute is set on the domain before attaching, > the context bank assigned to the domain will be programmed to allow translations > in the TTBR1 space. Translations in the TTBR0 region will be disallowed because, > as Robin pointe out, having a un-programmed TTBR0 register is dangerous. > > The driver can determine if TTBR1 was successfully programmed by querying > DOMAIN_ATTR_SPLIT_TABLES after attaching. The domain geometry will also be > updated to reflect the virtual address space for the TTBR1 range. > > Upcoming changes will allow auxiliary domains to be attached to the device which > will enable and program TTBR0. > > This patchset is based on top of linux-next-20200127. Quick ping for feedback so I can respin for (maybe?) 5.6. Thanks, Jordan > Change log: > > v4: Only program TTBR1 when split pagetables are requested. TTBR0 will be > enabled later when an auxiliary domain is attached > v3: Remove the implementation specific and make split pagetable support > part of the generic configuration > > [1] https://lists.linuxfoundation.org/pipermail/iommu/2020-January/041373.html > > Jordan Crouse (5): > iommu: Add DOMAIN_ATTR_SPLIT_TABLES > iommu/arm-smmu: Add support for TTBR1 > drm/msm: Attach the IOMMU device during initialization > drm/msm: Refactor address space initialization > drm/msm/a6xx: Support split pagetables > > drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 16 ++++++++++ > drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 1 + > drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 1 + > drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 1 + > drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 51 ++++++++++++++++++++++++++++++++ > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 23 ++++++++++---- > drivers/gpu/drm/msm/adreno/adreno_gpu.h | 8 +++++ > drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 18 ++++------- > drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 18 +++++------ > drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c | 4 --- > drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 18 +++++------ > drivers/gpu/drm/msm/msm_drv.h | 8 ++--- > drivers/gpu/drm/msm/msm_gem_vma.c | 36 ++++------------------ > drivers/gpu/drm/msm/msm_gpu.c | 49 ++---------------------------- > drivers/gpu/drm/msm/msm_gpu.h | 4 +-- > drivers/gpu/drm/msm/msm_gpummu.c | 6 ---- > drivers/gpu/drm/msm/msm_iommu.c | 18 ++++++----- > drivers/gpu/drm/msm/msm_mmu.h | 1 - > drivers/iommu/arm-smmu.c | 48 +++++++++++++++++++++++++----- > drivers/iommu/arm-smmu.h | 22 ++++++++++---- > include/linux/iommu.h | 2 ++ > 21 files changed, 198 insertions(+), 155 deletions(-) > > -- > 2.7.4 > _______________________________________________ > 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel