From patchwork Thu Sep 28 07:15:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13402188 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 47F0CCE7B04 for ; Thu, 28 Sep 2023 07:15:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231508AbjI1HPy (ORCPT ); Thu, 28 Sep 2023 03:15:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231322AbjI1HPs (ORCPT ); Thu, 28 Sep 2023 03:15:48 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28B0AF9; Thu, 28 Sep 2023 00:15:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695885343; x=1727421343; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WOT6Nvcwlk/4tcNAsxhrAgOjJcTJ1AZiQvr9aESlkuA=; b=NT6bCq7uT3UdwoUU/nXxlVQ0NsGn+pAVRZSPbOQHs2/rYfPRoPR/aNvm VB1AVpfEpap325ejnnT22+GPfyTQi3BWpGh5J7x2ET+qdU01u2YeTEHAC gYWGW0HyxxKXcNF3Hp4btvYI0wQJF4MR5z7t5HIxPqfdyezRxnupjt4ON SAGH1osCkKZadOpuDQAyfztkPhKsLsPVOgei6fFAnOBE7vrbCgnI6Sjjv nEUh7VHIZkMPDS7TdpkavQLOTL6uBNAHXogzbf7sNl/Ed9eoi4dcyr0Qd b2/VjQT/RrYGfbMjqUSkcuBalyrCHeWyhMkTAjiWu5BRyjoGy+Nbgm2NB g==; X-IronPort-AV: E=McAfee;i="6600,9927,10846"; a="412914902" X-IronPort-AV: E=Sophos;i="6.03,183,1694761200"; d="scan'208";a="412914902" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2023 00:15:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10846"; a="784602111" X-IronPort-AV: E=Sophos;i="6.03,183,1694761200"; d="scan'208";a="784602111" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga001.jf.intel.com with ESMTP; 28 Sep 2023 00:15:41 -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 v2 6/6] iommu/vt-d: Add domain_alloc_user op Date: Thu, 28 Sep 2023 00:15:28 -0700 Message-Id: <20230928071528.26258-7-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230928071528.26258-1-yi.l.liu@intel.com> References: <20230928071528.26258-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This adds the domain_alloc_user op implementation. It supports allocating domains to be used as parent under nested translation. Signed-off-by: Yi Liu Reviewed-by: Lu Baolu Reviewed-by: Kevin Tian --- drivers/iommu/intel/iommu.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 5db283c17e0d..017aed5813d8 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4074,6 +4074,33 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type) return NULL; } +static struct iommu_domain * +intel_iommu_domain_alloc_user(struct device *dev, u32 flags) +{ + struct iommu_domain *domain; + struct intel_iommu *iommu; + + if (flags & (~IOMMU_HWPT_ALLOC_NEST_PARENT)) + return ERR_PTR(-EOPNOTSUPP); + + iommu = device_to_iommu(dev, NULL, NULL); + if (!iommu) + return ERR_PTR(-ENODEV); + + if ((flags & IOMMU_HWPT_ALLOC_NEST_PARENT) && !ecap_nest(iommu->ecap)) + 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); + return domain; +} + static void intel_iommu_domain_free(struct iommu_domain *domain) { if (domain != &si_domain->domain && domain != &blocking_domain) @@ -4807,6 +4834,7 @@ const struct iommu_ops intel_iommu_ops = { .capable = intel_iommu_capable, .hw_info = intel_iommu_hw_info, .domain_alloc = intel_iommu_domain_alloc, + .domain_alloc_user = intel_iommu_domain_alloc_user, .probe_device = intel_iommu_probe_device, .probe_finalize = intel_iommu_probe_finalize, .release_device = intel_iommu_release_device,