From patchwork Tue Oct 24 15:14:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13434970 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 78808C25B71 for ; Tue, 24 Oct 2023 15:27:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234528AbjJXP1T (ORCPT ); Tue, 24 Oct 2023 11:27:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234992AbjJXP1E (ORCPT ); Tue, 24 Oct 2023 11:27:04 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CA3726A8; Tue, 24 Oct 2023 08:25:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698161153; x=1729697153; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8bknCuaXgjYm3S8328FfTMjKxCUCRzktFyfoYpNNj9c=; b=GzCTkamULyCM+t/oVAfkKoE4HSzJi5VSWcaG9X7NJmfMJ4NVxC+cgaE0 yVTZOhXbcrMyjtB0cEWZp+4t45GaD81DEt0Zuqxun++vkdyA96egzMgUA PuS6Y7vDgRAEzus/YjSCC372OAuaXWOp11L0AX0qWmk/lQgtpF5V1DrBh xr9V+mrQeQUazR5M64hBlZByAu3gltlwqWzfPZDnK9wTVHst/ptcSBfGk G5kgXk+FtHF3VJMaXQQV7pQtqoUCtsGAQJnMB7EQNHl+NvMteUz5LGkIl 0/7yW853+hea17rEGnbXD2X+H2iHf5rH81rCg9SGQd5F40uzFD5tQlZjo Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="418212209" X-IronPort-AV: E=Sophos;i="6.03,248,1694761200"; d="scan'208";a="418212209" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Oct 2023 08:14:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="1005688928" X-IronPort-AV: E=Sophos;i="6.03,248,1694761200"; d="scan'208";a="1005688928" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga006.fm.intel.com with ESMTP; 24 Oct 2023 08:14:17 -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 Subject: [PATCH v7 7/8] iommu/vt-d: Add nested domain allocation Date: Tue, 24 Oct 2023 08:14:11 -0700 Message-Id: <20231024151412.50046-8-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231024151412.50046-1-yi.l.liu@intel.com> References: <20231024151412.50046-1-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 Reviewed-by: Kevin Tian --- drivers/iommu/intel/iommu.c | 67 +++++++++++++++++++++++++------------ drivers/iommu/intel/iommu.h | 1 + 2 files changed, 46 insertions(+), 22 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 292baa64188b..85366862fb5e 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4077,46 +4077,69 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags, struct iommu_domain *parent, const struct iommu_user_data *user_data) { - struct iommu_domain *domain; struct intel_iommu *iommu; bool dirty_tracking; + bool nested_parent; 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)) - return ERR_PTR(-EOPNOTSUPP); - + nested_parent = flags & IOMMU_HWPT_ALLOC_NEST_PARENT; dirty_tracking = (flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING); - if (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 = iommu_domain_alloc(dev->bus); - if (!domain) - domain = ERR_PTR(-ENOMEM); + if (!user_data) { /* Must be PAGING domain */ + struct iommu_domain *domain; - if (!IS_ERR(domain) && dirty_tracking) { - if (to_dmar_domain(domain)->use_first_level) { - iommu_domain_free(domain); + if (nested_parent && !nested_supported(iommu)) return ERR_PTR(-EOPNOTSUPP); + if (dirty_tracking && !ssads_supported(iommu)) + return ERR_PTR(-EOPNOTSUPP); + if (parent) + return ERR_PTR(-EINVAL); + + /* + * 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) + return ERR_PTR(-ENOMEM); + + if (nested_parent) + to_dmar_domain(domain)->nested_parent = true; + + if (dirty_tracking) { + if (to_dmar_domain(domain)->use_first_level) { + iommu_domain_free(domain); + return ERR_PTR(-EOPNOTSUPP); + } + domain->dirty_ops = &intel_dirty_ops; } - domain->dirty_ops = &intel_dirty_ops; + + return domain; } - return domain; + /* Must be nested domain */ + if (user_data->type != IOMMU_HWPT_DATA_VTD_S1) + return ERR_PTR(-EOPNOTSUPP); + if (!nested_supported(iommu)) + return ERR_PTR(-EOPNOTSUPP); + if (!parent || parent->ops != intel_iommu_ops.default_domain_ops) + return ERR_PTR(-EINVAL); + if (!to_dmar_domain(parent)->nested_parent) + return ERR_PTR(-EINVAL); + if (nested_parent) + return ERR_PTR(-EINVAL); + if (dirty_tracking) + return ERR_PTR(-EINVAL); + + return intel_nested_domain_alloc(parent, user_data); } static void intel_iommu_domain_free(struct iommu_domain *domain) diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index d5aaaedf2094..65e660eb1f47 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 */