From patchwork Fri Oct 20 09:32:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13430402 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 1ECF1C004C0 for ; Fri, 20 Oct 2023 09:33:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376601AbjJTJdC (ORCPT ); Fri, 20 Oct 2023 05:33:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376649AbjJTJcy (ORCPT ); Fri, 20 Oct 2023 05:32:54 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2109AE8; Fri, 20 Oct 2023 02:32:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697794373; x=1729330373; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UhxPLZHsNBaJpuPmPuZrs6VDspZflofqLeRUV4csYhM=; b=KKJ35bEH4NiF3L+pJuxuilZoyuXpcQ+4IX5QMG87sCHZR0lWwkG/QxCH eFN0rMph4t8HZPlzvqp0/7VHnTMXI/ws5B597phEyMGM93ODh8Gjgr6eO hUmmDSRNkm330aylFL8h3fXiKe5n/Z41uMXZEZQioCTsMlzpnXrNXHA+Y nsY+1Vgvf6GfBc4DotXXb+VU0ioiNoeZAuS+/kf4C0jRWTkhQIpsBuyQc Uud4oFS0bcpVKUPkDPBAXk+D8PCxcjXrwLoUoK76XwltbbkjOgXdlZ4NI pT7z5TQSnT/9fxWkNURHXtemusqVul5fCdbyEI/IcvGm5AA2+pUZSk6DA Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="450691703" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="450691703" 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 02:32:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="733906298" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="733906298" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga006.jf.intel.com with ESMTP; 20 Oct 2023 02:32:52 -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, Jacob Pan Subject: [PATCH v6 3/8] iommu/vt-d: Add helper for nested domain allocation Date: Fri, 20 Oct 2023 02:32:41 -0700 Message-Id: <20231020093246.17015-4-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 helper for accepting user parameters and allocate a nested domain. Reviewed-by: Kevin Tian Signed-off-by: Jacob Pan Signed-off-by: Lu Baolu Signed-off-by: Yi Liu --- drivers/iommu/intel/Makefile | 2 +- drivers/iommu/intel/iommu.h | 2 ++ drivers/iommu/intel/nested.c | 55 ++++++++++++++++++++++++++++++++++++ 3 files changed, 58 insertions(+), 1 deletion(-) create mode 100644 drivers/iommu/intel/nested.c diff --git a/drivers/iommu/intel/Makefile b/drivers/iommu/intel/Makefile index 7af3b8a4f2a0..5dabf081a779 100644 --- a/drivers/iommu/intel/Makefile +++ b/drivers/iommu/intel/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DMAR_TABLE) += dmar.o -obj-$(CONFIG_INTEL_IOMMU) += iommu.o pasid.o +obj-$(CONFIG_INTEL_IOMMU) += iommu.o pasid.o nested.o obj-$(CONFIG_DMAR_TABLE) += trace.o cap_audit.o obj-$(CONFIG_DMAR_PERF) += perf.o obj-$(CONFIG_INTEL_IOMMU_DEBUGFS) += debugfs.o diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index a91077a063ee..ff55184456dd 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -866,6 +866,8 @@ void *alloc_pgtable_page(int node, gfp_t gfp); void free_pgtable_page(void *vaddr); void iommu_flush_write_buffer(struct intel_iommu *iommu); struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn); +struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *s2_domain, + const struct iommu_user_data *user_data); #ifdef CONFIG_INTEL_IOMMU_SVM void intel_svm_check(struct intel_iommu *iommu); diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c new file mode 100644 index 000000000000..5a2920a98e47 --- /dev/null +++ b/drivers/iommu/intel/nested.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * nested.c - nested mode translation support + * + * Copyright (C) 2023 Intel Corporation + * + * Author: Lu Baolu + * Jacob Pan + * Yi Liu + */ + +#define pr_fmt(fmt) "DMAR: " fmt + +#include + +#include "iommu.h" + +static void intel_nested_domain_free(struct iommu_domain *domain) +{ + kfree(to_dmar_domain(domain)); +} + +static const struct iommu_domain_ops intel_nested_domain_ops = { + .free = intel_nested_domain_free, +}; + +struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *s2_domain, + const struct iommu_user_data *user_data) +{ + struct iommu_hwpt_vtd_s1 vtd; + struct dmar_domain *domain; + int ret; + + ret = iommu_copy_struct_from_user(&vtd, user_data, + IOMMU_HWPT_DATA_VTD_S1, __reserved); + if (ret) + return ERR_PTR(ret); + + domain = kzalloc(sizeof(*domain), GFP_KERNEL_ACCOUNT); + if (!domain) + return NULL; + + domain->use_first_level = true; + domain->s2_domain = to_dmar_domain(s2_domain); + domain->s1_pgtbl = vtd.pgtbl_addr; + domain->s1_cfg = vtd; + domain->domain.ops = &intel_nested_domain_ops; + domain->domain.type = IOMMU_DOMAIN_NESTED; + INIT_LIST_HEAD(&domain->devices); + INIT_LIST_HEAD(&domain->dev_pasids); + spin_lock_init(&domain->lock); + xa_init(&domain->iommu_array); + + return &domain->domain; +}