From patchwork Thu Mar 9 08:09:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 661325 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 2E8A6C6FD1F for ; Thu, 9 Mar 2023 08:09:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230027AbjCIIJj (ORCPT ); Thu, 9 Mar 2023 03:09:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229943AbjCIIJe (ORCPT ); Thu, 9 Mar 2023 03:09:34 -0500 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52F657302F; Thu, 9 Mar 2023 00:09:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678349373; x=1709885373; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ze+YqyOq2FcrfezTmpCROik4OQxGxrLylWyUGP+0lZs=; b=gUaae1S1QdkkM12C3plJrp3gD35ZIuOuIl0wqjG6ppAaRe8HxEABnC2z Jrrfh64Az5sC4l+j3d7I2IRhNcn5OBwaykka1Z+/DwFzmDgrU0ZSiynWN 2yH0fsBwNf+zmALZFX42BtlOxbU6ChxFC+Z3pX2qs3xg7vu2YJwnbCH6L +9aYgtrFkHVyzCSheMdGJPfAyglR470sUSa9b6OsvOw/jqkFp1dg4atmm 3zkKTHG6ffNa0eocEt/o66AIdd9IDwTU1r6AIwkaFV6SvAKxasksubk7l wb8UHAwjwWl5kMELY1Q/iVI5vd5sZcv6RiB4ldIiaLf3lk5mOixZ70nRz w==; X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="364023072" X-IronPort-AV: E=Sophos;i="5.98,245,1673942400"; d="scan'208";a="364023072" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2023 00:09:29 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="787471382" X-IronPort-AV: E=Sophos;i="5.98,245,1673942400"; d="scan'208";a="787471382" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga002.fm.intel.com with ESMTP; 09 Mar 2023 00:09:26 -0800 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 Subject: [PATCH 05/12] iommufd/hw_pagetable: Do not populate user-managed hw_pagetables Date: Thu, 9 Mar 2023 00:09:03 -0800 Message-Id: <20230309080910.607396-6-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230309080910.607396-1-yi.l.liu@intel.com> References: <20230309080910.607396-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Nicolin Chen A user-managed hw_pagetable does not need to get populated, since it is managed by a guest OS. Move the iopt_table_add_domain and list_add_tail calls into a helper, where the hwpt pointer will be redirected to its hwpt->parent if it's available. Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu --- drivers/iommu/iommufd/hw_pagetable.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index 16e92a1c150b..6e45ec0a66fa 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -43,6 +43,23 @@ int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt) return 0; } +static int iommufd_hw_pagetable_link_ioas(struct iommufd_hw_pagetable *hwpt) +{ + int rc; + + if (hwpt->parent) + hwpt = hwpt->parent; + + if (!list_empty(&hwpt->hwpt_item)) + return 0; + + rc = iopt_table_add_domain(&hwpt->ioas->iopt, hwpt->domain); + if (rc) + return rc; + list_add_tail(&hwpt->hwpt_item, &hwpt->ioas->hwpt_list); + return 0; +} + /** * iommufd_hw_pagetable_alloc() - Get an iommu_domain for a device * @ictx: iommufd context @@ -131,10 +148,9 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, goto out_unlock; } - rc = iopt_table_add_domain(&hwpt->ioas->iopt, hwpt->domain); + rc = iommufd_hw_pagetable_link_ioas(hwpt); if (rc) goto out_detach; - list_add_tail(&hwpt->hwpt_item, &hwpt->ioas->hwpt_list); mutex_unlock(&idev->igroup->lock); return hwpt;