From patchwork Wed Aug 23 16:47:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 13362930 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40156C79F74 for ; Wed, 23 Aug 2023 16:47:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237686AbjHWQr5 (ORCPT ); Wed, 23 Aug 2023 12:47:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237674AbjHWQr4 (ORCPT ); Wed, 23 Aug 2023 12:47:56 -0400 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (mail-bn8nam12on2065.outbound.protection.outlook.com [40.107.237.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD67BCD5; Wed, 23 Aug 2023 09:47:54 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=PJrfoqtpy+XWYNIh+NkH0L1ORuD8OkmhNBlb7GvaQSbcvxcSMwXmzUSkAsTNRg33ONsu/rCloR2TOpGWtx0qT3u0mzlSdS3ORyOJXDwlSCEIliWJStRpTJVW77l89iV9cTx4fr9wwhjLdsLmDWZoD5ITvisq2Kw9vyIAlM2w8IlbmOk4kJsYPc6dLiWPt4+IjPoqmLUd9fTOoCcvpr31N7EUtM02JHsPvtXizLemtRFM7i8FjCUfe3+bCN9HMWl9WFC0UAn5hPJ/DmI1dtDebDN38uJv/3vgBK4DRgMoO1ARR4pdckyc8GZ0sAYwadm3yOMF5Xk+R3JC326HzNTrUQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=5bQTaN5b+qgoSyEQwOCYPGzeYBlCGBqHAqDsYdB9PPg=; b=MVJH3CVBfFS/WvUToHLMfw1x2NFcAedB+Z6/besK9LFCr7KIRVmJLd2LeGpayOw2td5NM0wi2y/QH1tHCZ9LAn3W5x/kmcBB31DQOygQhGn2394OBt4u5EQPBTbYVf4xsnhaWCbDzPH/wHtVTHqj4Vmh1cw83ensdn1pX91hbhXwbaNiduV/R78EMgJe6RvOAtQc+mE6hh/6Kz5XQecSwMNsf/sbxlD5jutyX9hqW0kHUR9r77oNn2ZiykIdUtyJAKI9Vu4IwzOMHijGM59nv2j2UgEQV8jt2nMbR8kqNLoXGOTVtso/mngt1OALr208eZPXGV+ml2xyx8sWDoLOWA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=5bQTaN5b+qgoSyEQwOCYPGzeYBlCGBqHAqDsYdB9PPg=; b=TLtG2C5BC97ZvUjPJEK/YrSbZJjJjn0k6O1FE3k9Tfid/qiErC750s7vICz/nfq61VIbEYUlZOwISSr4dRXG/TiCAIywwibYxOp8KmO7THWoUjDNERFYB46HwYeptuympQ8v+pH9frt0L+u+N9k4a2sl3O4osd7R7gbApJZyoccbAGNmMEpcZi0q6VyyOO7lIhX/qSPoR++kUlFTYbptf+KekCT2bXQH6hk+zCPaLkAYKUeBJMbcUj2N4WA0HqtgybUkB21kJTGTgJpBbKCPqfxNJ2Y0fUENjjGuPKPlpKvOFB/hUZK1bOfBUDaev1fRpZGuVci4nw6a7elrLhqx8A== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by CY5PR12MB6346.namprd12.prod.outlook.com (2603:10b6:930:21::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6699.24; Wed, 23 Aug 2023 16:47:50 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::5111:16e8:5afe:1da1]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::5111:16e8:5afe:1da1%6]) with mapi id 15.20.6699.020; Wed, 23 Aug 2023 16:47:50 +0000 From: Jason Gunthorpe To: Andy Gross , Alim Akhtar , Bjorn Andersson , AngeloGioacchino Del Regno , Baolin Wang , Christophe Leroy , Gerald Schaefer , Heiko Stuebner , iommu@lists.linux.dev, Jernej Skrabec , Jonathan Hunter , Joerg Roedel , Kevin Tian , Konrad Dybcio , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Russell King , linuxppc-dev@lists.ozlabs.org, Matthias Brugger , Matthew Rosato , Michael Ellerman , Nicholas Piggin , Orson Zhai , Rob Clark , Robin Murphy , Samuel Holland , Thierry Reding , Krishna Reddy , Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang Cc: Lu Baolu , Dmitry Osipenko , Marek Szyprowski , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: [PATCH v7 17/24] iommu/ipmmu: Add an IOMMU_IDENTITIY_DOMAIN Date: Wed, 23 Aug 2023 13:47:31 -0300 Message-ID: <17-v7-de04a3217c48+15055-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v7-de04a3217c48+15055-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: CH2PR20CA0005.namprd20.prod.outlook.com (2603:10b6:610:58::15) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|CY5PR12MB6346:EE_ X-MS-Office365-Filtering-Correlation-Id: 6ece3239-a17c-4cc7-6634-08dba3f8ab98 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV2PR12MB5869.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(376002)(396003)(136003)(346002)(366004)(39860400002)(186009)(1800799009)(451199024)(54906003)(66476007)(66946007)(6512007)(316002)(66556008)(110136005)(8676002)(8936002)(107886003)(2616005)(4326008)(36756003)(41300700001)(921005)(478600001)(6666004)(6506007)(38100700002)(6486002)(83380400001)(7416002)(2906002)(7406005)(86362001)(5660300002)(26005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6ece3239-a17c-4cc7-6634-08dba3f8ab98 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2023 16:47:43.2424 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: E63CjxhqA0km6CBQtVd5ENlexCsuEHgcwRzFDqFPloPRZXgCdJ+dJ8qQHvlKC3Cl X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6346 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org This brings back the ops->detach_dev() code that commit 1b932ceddd19 ("iommu: Remove detach_dev callbacks") deleted and turns it into an IDENTITY domain. Also reverts commit 584d334b1393 ("iommu/ipmmu-vmsa: Remove ipmmu_utlb_disable()") Reviewed-by: Lu Baolu Signed-off-by: Jason Gunthorpe Reviewed-by: Jerry Snitselaar --- drivers/iommu/ipmmu-vmsa.c | 43 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 65ff69477c43e4..04830d3931d239 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -295,6 +295,18 @@ static void ipmmu_utlb_enable(struct ipmmu_vmsa_domain *domain, mmu->utlb_ctx[utlb] = domain->context_id; } +/* + * Disable MMU translation for the microTLB. + */ +static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain, + unsigned int utlb) +{ + struct ipmmu_vmsa_device *mmu = domain->mmu; + + ipmmu_imuctr_write(mmu, utlb, 0); + mmu->utlb_ctx[utlb] = IPMMU_CTX_INVALID; +} + static void ipmmu_tlb_flush_all(void *cookie) { struct ipmmu_vmsa_domain *domain = cookie; @@ -627,6 +639,36 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain, return 0; } +static int ipmmu_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) +{ + struct iommu_domain *io_domain = iommu_get_domain_for_dev(dev); + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct ipmmu_vmsa_domain *domain; + unsigned int i; + + if (io_domain == identity_domain || !io_domain) + return 0; + + domain = to_vmsa_domain(io_domain); + for (i = 0; i < fwspec->num_ids; ++i) + ipmmu_utlb_disable(domain, fwspec->ids[i]); + + /* + * TODO: Optimize by disabling the context when no device is attached. + */ + return 0; +} + +static struct iommu_domain_ops ipmmu_iommu_identity_ops = { + .attach_dev = ipmmu_iommu_identity_attach, +}; + +static struct iommu_domain ipmmu_iommu_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &ipmmu_iommu_identity_ops, +}; + static int ipmmu_map(struct iommu_domain *io_domain, unsigned long iova, phys_addr_t paddr, size_t pgsize, size_t pgcount, int prot, gfp_t gfp, size_t *mapped) @@ -849,6 +891,7 @@ static struct iommu_group *ipmmu_find_group(struct device *dev) } static const struct iommu_ops ipmmu_ops = { + .identity_domain = &ipmmu_iommu_identity_domain, .domain_alloc = ipmmu_domain_alloc, .probe_device = ipmmu_probe_device, .release_device = ipmmu_release_device,