From patchwork Thu Oct 26 04:42:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13437241 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 EE1EAC25B48 for ; Thu, 26 Oct 2023 04:43:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235006AbjJZEnX (ORCPT ); Thu, 26 Oct 2023 00:43:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343824AbjJZEm7 (ORCPT ); Thu, 26 Oct 2023 00:42:59 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 149BC1B9; Wed, 25 Oct 2023 21:42:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698295377; x=1729831377; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6rYDQz/MWEAW+IS0pl99symy0Ie0OKVXnjfTmOy5Xes=; b=MEfyeyS3RvC76bRWVxKZBZmlc89iXvst9n9Lf+fXI0wYXI0+l6dtDrx7 YHHscLw4kVcEzDoYxXd1hzSr476a4u6AKjIfF+MoXaKe+EVCoLL2PTgUT D/YOOnXaumf97ALusHUeA7rFcaejyG2JQ7x2YZy4WyUTPlfX3quKbBpzS +GD2AqkO1fOFQ875cPiI4bVw/mZFwUO84/Tl6fM81hDir3mC4lFN21jaK xlO3V0bP8A/wOqFWWSnWPmpiRHx5AlIBNqRoX5kiT5jEB7C21b6qw6lzu 13dLgv8ZxldvqOHbTtBQJUQzxFQqhgKAtAcsqfMSvsQoFZj6QQEijPmdM w==; X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="367670790" X-IronPort-AV: E=Sophos;i="6.03,252,1694761200"; d="scan'208";a="367670790" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2023 21:42:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="829478589" X-IronPort-AV: E=Sophos;i="6.03,252,1694761200"; d="scan'208";a="829478589" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 25 Oct 2023 21:42:27 -0700 From: Yi Liu To: joro@8bytes.org, alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com, robin.murphy@arm.com, baolu.lu@linux.intel.com Cc: cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com, lulu@redhat.com, suravee.suthikulpanit@amd.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, zhenzhong.duan@intel.com, joao.m.martins@oracle.com, xin.zeng@intel.com Subject: [PATCH v8 7/8] iommu/vt-d: Add nested domain allocation Date: Wed, 25 Oct 2023 21:42:15 -0700 Message-Id: <20231026044216.64964-8-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231026044216.64964-1-yi.l.liu@intel.com> References: <20231026044216.64964-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Lu Baolu This adds the support for IOMMU_HWPT_DATA_VTD_S1 type. And 'nested_parent' is added to mark the nested parent domain to sanitize the input parent domain. Signed-off-by: Lu Baolu Signed-off-by: Yi Liu Signed-off-by: Jason Gunthorpe --- drivers/iommu/intel/iommu.c | 39 ++++++++++++++++++------------------ drivers/iommu/intel/iommu.h | 1 + drivers/iommu/intel/nested.c | 3 ++- 3 files changed, 23 insertions(+), 20 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 292baa64188b..4ce372d5d4f3 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4077,38 +4077,39 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags, struct iommu_domain *parent, const struct iommu_user_data *user_data) { + struct device_domain_info *info = dev_iommu_priv_get(dev); + bool dirty_tracking = flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING; + bool nested_parent = flags & IOMMU_HWPT_ALLOC_NEST_PARENT; + struct intel_iommu *iommu = info->iommu; struct iommu_domain *domain; - struct intel_iommu *iommu; - bool dirty_tracking; + + /* Must be NESTING domain */ + if (parent) { + if (!nested_supported(iommu) || flags) + return ERR_PTR(-EOPNOTSUPP); + return intel_nested_domain_alloc(parent, user_data); + } if (flags & (~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING))) return ERR_PTR(-EOPNOTSUPP); - - if (parent || user_data) - return ERR_PTR(-EOPNOTSUPP); - - iommu = device_to_iommu(dev, NULL, NULL); - if (!iommu) - return ERR_PTR(-ENODEV); - - if ((flags & IOMMU_HWPT_ALLOC_NEST_PARENT) && !nested_supported(iommu)) + if (nested_parent && !nested_supported(iommu)) return ERR_PTR(-EOPNOTSUPP); - - dirty_tracking = (flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING); - if (dirty_tracking && !ssads_supported(iommu)) + if (user_data || (dirty_tracking && !ssads_supported(iommu))) return ERR_PTR(-EOPNOTSUPP); /* - * domain_alloc_user op needs to fully initialize a domain - * before return, so uses iommu_domain_alloc() here for - * simple. + * domain_alloc_user op needs to fully initialize a domain before + * return, so uses iommu_domain_alloc() here for simple. */ domain = iommu_domain_alloc(dev->bus); if (!domain) - domain = ERR_PTR(-ENOMEM); + return ERR_PTR(-ENOMEM); + + if (nested_parent) + to_dmar_domain(domain)->nested_parent = true; - if (!IS_ERR(domain) && dirty_tracking) { + if (dirty_tracking) { if (to_dmar_domain(domain)->use_first_level) { iommu_domain_free(domain); return ERR_PTR(-EOPNOTSUPP); diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index 6a97711f947a..ba9be915eb84 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -601,6 +601,7 @@ struct dmar_domain { * level. */ u8 dirty_tracking:1; /* Dirty tracking is enabled */ + u8 nested_parent:1; /* Has other domains nested on it */ spinlock_t lock; /* Protect device tracking lists */ struct list_head devices; /* all devices' list */ diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c index b560ab76e126..b5a5563ab32c 100644 --- a/drivers/iommu/intel/nested.c +++ b/drivers/iommu/intel/nested.c @@ -89,7 +89,8 @@ struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *parent, /* Must be nested domain */ if (user_data->type != IOMMU_HWPT_DATA_VTD_S1) return ERR_PTR(-EOPNOTSUPP); - if (parent->ops != intel_iommu_ops.default_domain_ops) + if (parent->ops != intel_iommu_ops.default_domain_ops || + !s2_domain->nested_parent) return ERR_PTR(-EINVAL); ret = iommu_copy_struct_from_user(&vtd, user_data,