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=-12.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 83040C433E9 for ; Mon, 8 Feb 2021 16:42:39 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3F8FB64E26 for ; Mon, 8 Feb 2021 16:42:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3F8FB64E26 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=GWwckaiNzHS7cnkei42LjnvhpUN458YPItYMSz4/WHQ=; b=SHERweTSkW2NzLzq7jj0xmmfVD Rg2iNrcZ/Fg16a+CyS2hqV9BMxVYk2gy7Psr4sbxMSWd9LzU6hDJgTlmHzO+MMFMfmizSrYQgsjh7 lrh76Vi0RZGlC8O/dJOi7PBScDYRIKyxhYIty3TFSYH5gfi/3Hgq+4T/cSA7V4FfyQg2qAhWlLYZf lioIA0GARHBMS0v9nxnG2VGbHfHNponRbEH0AgWsJR8KpQ5lUNZb2o3L6YSFWVeDMkY0igXiPXFqf zNrTQgYljg/pymof+BRMP+ab2V1cv9M3EbKSGLalKT69puB+rsuK2vGVeHAc9MpmdfLkJvoX+9xQ6 TubjsHZA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l99bF-0001pz-RQ; Mon, 08 Feb 2021 16:41:21 +0000 Received: from mail.kapsi.fi ([2001:67c:1be8::25]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l99b6-0001jb-Em for linux-arm-kernel@lists.infradead.org; Mon, 08 Feb 2021 16:41:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=zsMyB8iB5UFqB7I23yLfnPURCPkNxas5AAE7y5zKVNk=; b=0KBKndFzSldu2iADE2qOcDWoAu fI//NkZoWtROK5JPXUNq1Hrz73Ua6/4jCPrvxg5ZN/DgAfcxuEY5bSjcmscNbY3J76I3vYQaKnBi4 vYvCv3mMoQeIqJClK6IYUmCRbtxSdNpVz8LBIsrNeN0TBi/oqZ79zQpzRV2549g2zC2RmNK5cXBvb AG3wqRxCgvCHq26ugQI8HxKKF4PV48dJwEiyx7fWF6vr6rngXmlt/PI1jNztMDJsj0v5oasRwFmY1 PPModuGvc/3gxr7RPlJ/IyRk/NZY8+4AR5dzrTV96MsiNjCMgn64YCk1Ec57UaOXyEHcxKOwNiXw2 XoCsD83w==; Received: from dsl-hkibng22-54f986-236.dhcp.inet.fi ([84.249.134.236] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1l99as-0000Cr-G2; Mon, 08 Feb 2021 18:40:58 +0200 From: Mikko Perttunen To: thierry.reding@gmail.com, jonathanh@nvidia.com, joro@8bytes.org, will@kernel.org, robh+dt@kernel.org, frowand.list@gmail.com, robin.murphy@arm.com Subject: [RFC PATCH 0/8] Host1x context isolation support Date: Mon, 8 Feb 2021 18:38:40 +0200 Message-Id: <20210208163848.2504291-1-mperttunen@nvidia.com> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 84.249.134.236 X-SA-Exim-Mail-From: mperttunen@nvidia.com X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210208_114112_982098_1C855C9D X-CRM114-Status: GOOD ( 16.76 ) 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: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Mikko Perttunen , iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi all, this series adds support for Host1x 'context isolation'. Since when programming engines through Host1x, userspace can program in any addresses it wants, we need some way to isolate the engines' memory spaces. Traditionally this has either been done imperfectly with a single shared IOMMU domain, or by copying and verifying the programming command stream at submit time (Host1x firewall). Since Tegra186 there is a privileged (only usable by kernel) Host1x opcode that allows setting the stream ID sent by the engine to the SMMU. So, by allocating a number of context banks and stream IDs for this purpose, and using this opcode at the beginning of each job, we can implement isolation. Due to the limited number of context banks only each process gets its own context, and not each channel. This feature also allows sharing engines among multiple VMs when used with Host1x's hardware virtualization support - up to 8 VMs can be configured with a subset of allowed stream IDs, enforced at hardware level. To implement this, this series adds a new host1x context bus, which will contain the 'struct device's corresponding to each context bank / stream ID, changes to device tree and SMMU code to allow registering the devices and using the bus, as well as the Host1x stream ID programming code and support in TegraDRM. The series is based on v5 of the "Host1x/TegraDRM UAPI" series, which still hasn't quite settled. Also, I haven't updated the device tree bindings (or converted them to YAML) yet, so this is RFC for now. Thanks! Mikko Mikko Perttunen (8): of/device: Allow specifying a custom iommu_spec to of_dma_configure gpu: host1x: Add context bus gpu: host1x: Add context device management code gpu: host1x: Program context stream ID on submission iommu/arm-smmu: Attach to host1x context device bus arm64: tegra: Add Host1x context stream IDs on Tegra186+ drm/tegra: Support context isolation drm/tegra: vic: Implement get_streamid_offset arch/arm64/boot/dts/nvidia/tegra186.dtsi | 9 ++ drivers/gpu/Makefile | 3 +- drivers/gpu/drm/tegra/drm.h | 1 + drivers/gpu/drm/tegra/uapi.h | 1 + drivers/gpu/drm/tegra/uapi/submit.c | 13 ++ drivers/gpu/drm/tegra/uapi/uapi.c | 34 ++++- drivers/gpu/drm/tegra/vic.c | 38 +++++ drivers/gpu/host1x/Kconfig | 5 + drivers/gpu/host1x/Makefile | 2 + drivers/gpu/host1x/context.c | 161 ++++++++++++++++++++++ drivers/gpu/host1x/context.h | 27 ++++ drivers/gpu/host1x/context_bus.c | 31 +++++ drivers/gpu/host1x/dev.c | 12 +- drivers/gpu/host1x/dev.h | 2 + drivers/gpu/host1x/hw/channel_hw.c | 52 ++++++- drivers/gpu/host1x/hw/host1x06_hardware.h | 10 ++ drivers/gpu/host1x/hw/host1x07_hardware.h | 10 ++ drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 ++ drivers/iommu/of_iommu.c | 12 +- drivers/of/device.c | 9 +- include/linux/host1x.h | 21 +++ include/linux/host1x_context_bus.h | 15 ++ include/linux/of_device.h | 34 ++++- include/linux/of_iommu.h | 6 +- 24 files changed, 495 insertions(+), 26 deletions(-) create mode 100644 drivers/gpu/host1x/context.c create mode 100644 drivers/gpu/host1x/context.h create mode 100644 drivers/gpu/host1x/context_bus.c create mode 100644 include/linux/host1x_context_bus.h -- 2.30.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel