From patchwork Fri Oct 20 09:32:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13430390 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 6B6AACDB474 for ; Fri, 20 Oct 2023 09:32:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376698AbjJTJcy (ORCPT ); Fri, 20 Oct 2023 05:32:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376601AbjJTJcx (ORCPT ); Fri, 20 Oct 2023 05:32:53 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DFE4D53; Fri, 20 Oct 2023 02:32:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697794371; x=1729330371; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DXIvRNOCtaIRDhqetLa0HFPc3lYj6M16Uhk2EvUaat4=; b=hSgVNbpDtaV3CptMg2CVioBF3rkK4FBj3VsVk82x1Yub6QacO7DF7ghQ oUnf8ofDhEFfCDtn/Wi/U86jXjVWTK7Rta9BPdEWmbupHBGeXQhpdQ9Pu c6Uf9DXg0N2oP0iP3j+z6yq/y4XolamAZ/+CVno+yJf9J1ce4JStSMQKS plEQIWFwwhtDFeSf0MeKgrtQeLwkdASxzWki5Xdm/CWaZ5LL9nMF2QSmp TYS/TltUslpP+3MDYYEW9cfZwBskeAYSDw31spxBIlzRvwPMe4+fhbwDT qhkOzty7Gnu61V89hifC9o02rdnyNnKgUkBQ3NNMKFgIMe3DLB0Yp1NXf Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="450691688" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="450691688" 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 02:32:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="733906294" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="733906294" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga006.jf.intel.com with ESMTP; 20 Oct 2023 02:32:50 -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 2/8] iommu/vt-d: Extend dmar_domain to support nested domain Date: Fri, 20 Oct 2023 02:32:40 -0700 Message-Id: <20231020093246.17015-3-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: linux-kselftest@vger.kernel.org From: Lu Baolu The nested domain fields are exclusive to those that used for a DMA remapping domain. Use union to avoid memory waste. Reviewed-by: Kevin Tian Signed-off-by: Lu Baolu Signed-off-by: Yi Liu --- drivers/iommu/intel/iommu.h | 36 ++++++++++++++++++++++++++++++------ 1 file changed, 30 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index c18fb699c87a..a91077a063ee 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -25,6 +25,7 @@ #include #include +#include /* * VT-d hardware uses 4KiB page size regardless of host page size. @@ -597,15 +598,38 @@ struct dmar_domain { struct list_head devices; /* all devices' list */ struct list_head dev_pasids; /* all attached pasids */ - struct dma_pte *pgd; /* virtual address */ - int gaw; /* max guest address width */ - - /* adjusted guest address width, 0 is level 2 30-bit */ - int agaw; int iommu_superpage;/* Level of superpages supported: 0 == 4KiB (no superpages), 1 == 2MiB, 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */ - u64 max_addr; /* maximum mapped address */ + union { + /* DMA remapping domain */ + struct { + /* virtual address */ + struct dma_pte *pgd; + /* max guest address width */ + int gaw; + /* + * adjusted guest address width: + * 0: level 2 30-bit + * 1: level 3 39-bit + * 2: level 4 48-bit + * 3: level 5 57-bit + */ + int agaw; + /* maximum mapped address */ + u64 max_addr; + }; + + /* Nested user domain */ + struct { + /* parent page table which the user domain is nested on */ + struct dmar_domain *s2_domain; + /* user page table pointer (in GPA) */ + unsigned long s1_pgtbl; + /* page table attributes */ + struct iommu_hwpt_vtd_s1 s1_cfg; + }; + }; struct iommu_domain domain; /* generic domain data structure for iommu core */