From patchwork Fri Oct 20 09:32:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13430403 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 7A8C9C004C0 for ; Fri, 20 Oct 2023 09:33:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376712AbjJTJdH (ORCPT ); Fri, 20 Oct 2023 05:33:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376720AbjJTJdD (ORCPT ); Fri, 20 Oct 2023 05:33:03 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39701D60; Fri, 20 Oct 2023 02:32:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697794376; x=1729330376; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=L8v6hkJ+JIrDo8fqWs8a0xtoOtnuvQ0CSEXJ3O4E29A=; b=CAnUi3VcB1BoyEt1OGnhJqYbQvUSHLjNQbzZF/OYoR6IvbKDDPdw9HFM 5e6J69zmgPVYOejCzAIgD1LH+IKsdfTh9lUPsLlP7ZX15KmqDlOuobnFj 49nVmCbsOQx9+TdfZkda1Sn8g/JcSDNg2vSHcoNSl7YTo3zGEt5LA+w12 /8b5HNvIz8g5dc0HmYmBNNinCom9/Z7I7xYWx+yHFEdmH8d/MDjrOLd7x UZP/wik1R3W6y+GvcKh8EN3GIjFxdyLslxBCRw7tICcUfRQIASibimS2G 1s8S5aQ0iwEXCDqXNyRWSGcV+ynoC0hhMoGXFwwxKLOAWTtgXZYKzQ+Cc w==; X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="450691749" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="450691749" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2023 02:32:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="733906311" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="733906311" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga006.jf.intel.com with ESMTP; 20 Oct 2023 02:32:55 -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 v6 7/8] iommu/vt-d: Add nested domain allocation Date: Fri, 20 Oct 2023 02:32:45 -0700 Message-Id: <20231020093246.17015-8-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231020093246.17015-1-yi.l.liu@intel.com> References: <20231020093246.17015-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Lu Baolu This adds the support for IOMMU_HWPT_DATA_VTD_S1 type. Signed-off-by: Lu Baolu Signed-off-by: Yi Liu --- drivers/iommu/intel/iommu.c | 39 ++++++++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index b47025fbdea4..c7704e7efd4a 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4076,7 +4076,7 @@ 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; + bool request_nest_parent = flags & IOMMU_HWPT_ALLOC_NEST_PARENT; struct intel_iommu *iommu; if (flags & (~IOMMU_HWPT_ALLOC_NEST_PARENT)) @@ -4086,18 +4086,35 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags, if (!iommu) return ERR_PTR(-ENODEV); - if ((flags & IOMMU_HWPT_ALLOC_NEST_PARENT) && !ecap_nest(iommu->ecap)) + if (!user_data) { /* Must be PAGING domain */ + struct iommu_domain *domain; + + if (request_nest_parent && !ecap_nest(iommu->ecap)) + 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); + return domain; + } + + /* Must be nested domain */ + if (!ecap_nest(iommu->ecap)) + return ERR_PTR(-EOPNOTSUPP); + if (user_data->type != IOMMU_HWPT_DATA_VTD_S1) return ERR_PTR(-EOPNOTSUPP); + if (!parent || parent->ops != intel_iommu_ops.default_domain_ops) + return ERR_PTR(-EINVAL); + if (request_nest_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) - domain = ERR_PTR(-ENOMEM); - return domain; + return intel_nested_domain_alloc(parent, user_data); } static void intel_iommu_domain_free(struct iommu_domain *domain)