From patchwork Thu Sep 21 07:54:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13394477 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 5632AE7D0A8 for ; Thu, 21 Sep 2023 20:10:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230011AbjIUUKm (ORCPT ); Thu, 21 Sep 2023 16:10:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232158AbjIUUKY (ORCPT ); Thu, 21 Sep 2023 16:10:24 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C8FE9012; Thu, 21 Sep 2023 10:11:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695316261; x=1726852261; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=t+k2G75egWOCXj1vZiBpp5H5yozqcf2ftiKJs05q63Y=; b=Z5qZI3t17/SEWbtr33vbiDnrXcX4YECTIwGXhvStZRbGTpHdss3c+4yy qMQbDU3KNcsZtdZThbVp6is14/B5+6FppgvOmDA3Rse8COaRXfgoxTjMq USbesgx0wW1HHFGMPI5kMcyv3uK/YI7qsY337cq01ariemYi3x7mxORNp mpNjO1e/C6p2j/80MQIL3dDWlID2EpMHND+XUKYiR17xlIVsCDqtVWRzw uVzh/opRmqzKBCDGxyEJ12maTPgB3i7ns5TNcRESnYAZzSeyv8N7iHk+r Q2IMEe52bd0JLkRMGgSIllqsiwvbRPo6sJIphy4bNDDI2TJZkUgzffp0W w==; X-IronPort-AV: E=McAfee;i="6600,9927,10839"; a="370764399" X-IronPort-AV: E=Sophos;i="6.03,164,1694761200"; d="scan'208";a="370764399" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Sep 2023 00:54:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10839"; a="812523067" X-IronPort-AV: E=Sophos;i="6.03,164,1694761200"; d="scan'208";a="812523067" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga008.fm.intel.com with ESMTP; 21 Sep 2023 00:54:46 -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, Jacob Pan Subject: [PATCH v5 03/11] iommu/vt-d: Add helper for nested domain allocation Date: Thu, 21 Sep 2023 00:54:23 -0700 Message-Id: <20230921075431.125239-4-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230921075431.125239-1-yi.l.liu@intel.com> References: <20230921075431.125239-1-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 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 | 54 ++++++++++++++++++++++++++++++++++++ 3 files changed, 57 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 4a7f1cc16afa..a82e232abae0 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -865,6 +865,8 @@ 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..012d5ff60265 --- /dev/null +++ b/drivers/iommu/intel/nested.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * nested.c - nested mode translation support + * + * Copyright (C) 2023 Intel Corporation + * + * Author: Lu Baolu + * Jacob Pan + */ + +#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) +{ + const size_t min_len = offsetofend(struct iommu_hwpt_vtd_s1, __reserved); + struct iommu_hwpt_vtd_s1 vtd; + struct dmar_domain *domain; + int ret; + + ret = iommu_copy_user_data(&vtd, user_data, sizeof(vtd), min_len); + 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; +}