From patchwork Thu Oct 26 04:39:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 738558 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 0F376C25B48 for ; Thu, 26 Oct 2023 04:39:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343608AbjJZEj6 (ORCPT ); Thu, 26 Oct 2023 00:39:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233628AbjJZEjw (ORCPT ); Thu, 26 Oct 2023 00:39:52 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE55D186; Wed, 25 Oct 2023 21:39:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698295188; x=1729831188; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VzU84oetmnLH1pN8XZzdCzD5/BUGYg5LyBn9RczZ7eQ=; b=F5u8SwKrXN6DaEG9dhzsWw0NmC9biUqBxEZZ3rK8ugVUdtxXbGw0u2Pv YAV0FJoP5/QkZBlDnGjrSAXOAMdBrAe/7feVEsz0d5H+w3ZJF86l0Rl3T BDb3v0LqjAUASAsya+ZxL+zT3aqN1ijHW1duimdc2x4lcNIUVpnxJHTOZ eEQb5IoVQ08qxBZ4F63dTgTqbYiSx+s0cCAdudHdCvXS4+3LZxloeWGos RzQWZwXptMO+T0oTwFICee/eSm6L1rGQPenjksPKyv1Ef0Aq7WSNrXukn XPZrl3mDErVD2C+ePS8w2lcDw0ox5h3XBGXKdnlXzvuMUw46w/0c2tvjo g==; X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="9014463" X-IronPort-AV: E=Sophos;i="6.03,252,1694761200"; d="scan'208";a="9014463" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2023 21:39:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="708931294" X-IronPort-AV: E=Sophos;i="6.03,252,1694761200"; d="scan'208";a="708931294" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga003.jf.intel.com with ESMTP; 25 Oct 2023 21:39:43 -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 v7 03/10] iommufd/device: Wrap IOMMUFD_OBJ_HWPT_PAGING-only configurations Date: Wed, 25 Oct 2023 21:39:31 -0700 Message-Id: <20231026043938.63898-4-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231026043938.63898-1-yi.l.liu@intel.com> References: <20231026043938.63898-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Jason Gunthorpe Some of the configurations during the attach/replace() should only apply to IOMMUFD_OBJ_HWPT_PAGING. Once IOMMUFD_OBJ_HWPT_NESTED gets introduced in a following patch, keeping them unconditionally in the common routine will not work. Wrap all of those PAGING-only configurations together into helpers. Do a hwpt_is_paging check whenever calling them or their fallback routines. Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe --- drivers/iommu/iommufd/device.c | 111 +++++++++++++++++------- drivers/iommu/iommufd/iommufd_private.h | 5 ++ 2 files changed, 86 insertions(+), 30 deletions(-) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 449b64e6ef53..0c844acb15b9 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -325,6 +325,28 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup, return 0; } +static int iommufd_hwpt_paging_attach(struct iommufd_hw_pagetable *hwpt, + struct iommufd_device *idev) +{ + int rc; + + lockdep_assert_held(&idev->igroup->lock); + + rc = iopt_table_enforce_dev_resv_regions(&hwpt->ioas->iopt, idev->dev, + &idev->igroup->sw_msi_start); + if (rc) + return rc; + + if (list_empty(&idev->igroup->device_list)) { + rc = iommufd_group_setup_msi(idev->igroup, hwpt); + if (rc) { + iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); + return rc; + } + } + return 0; +} + int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, struct iommufd_device *idev) { @@ -337,10 +359,11 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, goto err_unlock; } - rc = iopt_table_enforce_dev_resv_regions(&hwpt->ioas->iopt, idev->dev, - &idev->igroup->sw_msi_start); - if (rc) - goto err_unlock; + if (hwpt_is_paging(hwpt)) { + rc = iommufd_hwpt_paging_attach(hwpt, idev); + if (rc) + goto err_unlock; + } /* * Only attach to the group once for the first device that is in the @@ -350,10 +373,6 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, * attachment. */ if (list_empty(&idev->igroup->device_list)) { - rc = iommufd_group_setup_msi(idev->igroup, hwpt); - if (rc) - goto err_unresv; - rc = iommu_attach_group(hwpt->domain, idev->igroup->group); if (rc) goto err_unresv; @@ -364,7 +383,8 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, mutex_unlock(&idev->igroup->lock); return 0; err_unresv: - iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); + if (hwpt_is_paging(hwpt)) + iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); err_unlock: mutex_unlock(&idev->igroup->lock); return rc; @@ -381,7 +401,8 @@ iommufd_hw_pagetable_detach(struct iommufd_device *idev) iommu_detach_group(hwpt->domain, idev->igroup->group); idev->igroup->hwpt = NULL; } - iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); + if (hwpt_is_paging(hwpt)) + iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); mutex_unlock(&idev->igroup->lock); /* Caller must destroy hwpt */ @@ -400,13 +421,52 @@ iommufd_device_do_attach(struct iommufd_device *idev, return NULL; } +static void +iommufd_group_remove_reserved_iova(struct iommufd_group *igroup, + struct iommufd_hw_pagetable *hwpt) +{ + struct iommufd_device *cur; + + lockdep_assert_held(&igroup->lock); + + list_for_each_entry(cur, &igroup->device_list, group_item) + iopt_remove_reserved_iova(&hwpt->ioas->iopt, cur->dev); +} + +static int iommufd_group_do_replace_paging(struct iommufd_group *igroup, + struct iommufd_hw_pagetable *hwpt) +{ + struct iommufd_hw_pagetable *old_hwpt = igroup->hwpt; + struct iommufd_device *cur; + int rc; + + lockdep_assert_held(&igroup->lock); + + if (!hwpt_is_paging(old_hwpt) || hwpt->ioas != old_hwpt->ioas) { + list_for_each_entry(cur, &igroup->device_list, group_item) { + rc = iopt_table_enforce_dev_resv_regions( + &hwpt->ioas->iopt, cur->dev, NULL); + if (rc) + goto err_unresv; + } + } + + rc = iommufd_group_setup_msi(igroup, hwpt); + if (rc) + goto err_unresv; + return 0; + +err_unresv: + iommufd_group_remove_reserved_iova(igroup, hwpt); + return rc; +} + static struct iommufd_hw_pagetable * iommufd_device_do_replace(struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt) { struct iommufd_group *igroup = idev->igroup; struct iommufd_hw_pagetable *old_hwpt; - struct iommufd_device *cur; unsigned int num_devices; int rc; @@ -422,29 +482,20 @@ iommufd_device_do_replace(struct iommufd_device *idev, return NULL; } - old_hwpt = igroup->hwpt; - if (hwpt->ioas != old_hwpt->ioas) { - list_for_each_entry(cur, &igroup->device_list, group_item) { - rc = iopt_table_enforce_dev_resv_regions( - &hwpt->ioas->iopt, cur->dev, NULL); - if (rc) - goto err_unresv; - } + if (hwpt_is_paging(hwpt)) { + rc = iommufd_group_do_replace_paging(igroup, hwpt); + if (rc) + goto err_unlock; } - rc = iommufd_group_setup_msi(idev->igroup, hwpt); - if (rc) - goto err_unresv; - rc = iommu_group_replace_domain(igroup->group, hwpt->domain); if (rc) goto err_unresv; - if (hwpt->ioas != old_hwpt->ioas) { - list_for_each_entry(cur, &igroup->device_list, group_item) - iopt_remove_reserved_iova(&old_hwpt->ioas->iopt, - cur->dev); - } + old_hwpt = igroup->hwpt; + if (hwpt_is_paging(old_hwpt) && + (!hwpt_is_paging(hwpt) || hwpt->ioas != old_hwpt->ioas)) + iommufd_group_remove_reserved_iova(igroup, old_hwpt); igroup->hwpt = hwpt; @@ -462,8 +513,8 @@ iommufd_device_do_replace(struct iommufd_device *idev, /* Caller must destroy old_hwpt */ return old_hwpt; err_unresv: - list_for_each_entry(cur, &igroup->device_list, group_item) - iopt_remove_reserved_iova(&hwpt->ioas->iopt, cur->dev); + if (hwpt_is_paging(hwpt)) + iommufd_group_remove_reserved_iova(igroup, hwpt); err_unlock: mutex_unlock(&idev->igroup->lock); return ERR_PTR(rc); diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index 70bebad63a74..776dd41c077f 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -252,6 +252,11 @@ struct iommufd_hw_pagetable { struct list_head hwpt_item; }; +static inline bool hwpt_is_paging(struct iommufd_hw_pagetable *hwpt) +{ + return hwpt->obj.type == IOMMUFD_OBJ_HWPT_PAGING; +} + static inline struct iommufd_hw_pagetable * iommufd_get_hwpt(struct iommufd_ucmd *ucmd, u32 id) {