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[23.128.96.31]) by mx.google.com with ESMTPS id cb9-20020a056a02070900b00578faac74a4si1649561pgb.577.2023.10.20.02.21.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Oct 2023 02:21:56 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.31 as permitted sender) client-ip=23.128.96.31; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=chl+Aomv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.31 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by morse.vger.email (Postfix) with ESMTP id 6463B8221789; Fri, 20 Oct 2023 02:21:32 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at morse.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376696AbjJTJVC (ORCPT + 25 others); Fri, 20 Oct 2023 05:21:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376676AbjJTJUS (ORCPT ); Fri, 20 Oct 2023 05:20:18 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFDD0D60; Fri, 20 Oct 2023 02:20:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697793602; x=1729329602; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9EgME6PzSlZ5ig0d0uUH6Pd7j77lK3/DCO/qMVd1eog=; b=chl+AomvM95Ge/puiFRRv7kOW9dx3tmn1cbASgBqW8NjNcuNyg4lEVTT +ymT4NnkTvFBhXj5Ou3SesT9a9DB0JwWAvguAghM/WSAqYeG0s7ANAuTn hJeybchJ+hz8Ex8vqHUIBt1hQV0X4EFzmFUnvagO6j3Jx7ADbIpf41l7h Nr+x4q7PLtEn8aiih6JwUXnL2yX0YhyPHw3v+IWB9LOwYSuCzG3nnOQFy zDQWs4zqeTWqcSCMFXvya5RPOYIuYt0tVsZTZV57zMLw1Kc3za5RuCctE DW/54lAk3SUH752tE6a/XRH3jLG+9zOHVI35JNMc5W+9/qSFW5DLpovd6 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="366693397" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="366693397" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2023 02:20:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="707179453" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="707179453" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga003.jf.intel.com with ESMTP; 20 Oct 2023 02:20:01 -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 v5 05/10] iommufd: Derive iommufd_hwpt_paging from iommufd_hw_pagetable Date: Fri, 20 Oct 2023 02:19:41 -0700 Message-Id: <20231020091946.12173-6-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231020091946.12173-1-yi.l.liu@intel.com> References: <20231020091946.12173-1-yi.l.liu@intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Fri, 20 Oct 2023 02:21:32 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780265743822592249 X-GMAIL-MSGID: 1780265743822592249 From: Nicolin Chen To prepare for IOMMUFD_OBJ_HWPT_NESTED, derive struct iommufd_hwpt_paging from struct iommufd_hw_pagetable, by leaving the common members in struct iommufd_hw_pagetable. Add a __iommufd_object_alloc and to_hwpt_paging() helpers for the new structure. Then, update "hwpt" to "hwpt_paging" throughout the files, accordingly. Suggested-by: Jason Gunthorpe Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu --- drivers/iommu/iommufd/device.c | 78 ++++++++++++-------- drivers/iommu/iommufd/hw_pagetable.c | 98 ++++++++++++++----------- drivers/iommu/iommufd/iommufd_private.h | 37 +++++++--- drivers/iommu/iommufd/main.c | 4 +- drivers/iommu/iommufd/vfio_compat.c | 6 +- 5 files changed, 131 insertions(+), 92 deletions(-) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 3414276bbd15..cc9f5d0e5b7e 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -293,7 +293,7 @@ u32 iommufd_device_to_id(struct iommufd_device *idev) EXPORT_SYMBOL_NS_GPL(iommufd_device_to_id, IOMMUFD); static int iommufd_group_setup_msi(struct iommufd_group *igroup, - struct iommufd_hw_pagetable *hwpt) + struct iommufd_hwpt_paging *hwpt_paging) { phys_addr_t sw_msi_start = igroup->sw_msi_start; int rc; @@ -311,8 +311,9 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup, * matches what the IRQ layer actually expects in a newly created * domain. */ - if (sw_msi_start != PHYS_ADDR_MAX && !hwpt->msi_cookie) { - rc = iommu_get_msi_cookie(hwpt->domain, sw_msi_start); + if (sw_msi_start != PHYS_ADDR_MAX && !hwpt_paging->msi_cookie) { + rc = iommu_get_msi_cookie(hwpt_paging->common.domain, + sw_msi_start); if (rc) return rc; @@ -320,12 +321,12 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup, * iommu_get_msi_cookie() can only be called once per domain, * it returns -EBUSY on later calls. */ - hwpt->msi_cookie = true; + hwpt_paging->msi_cookie = true; } return 0; } -static int iommufd_hwpt_paging_attach(struct iommufd_hw_pagetable *hwpt, +static int iommufd_hwpt_paging_attach(struct iommufd_hwpt_paging *hwpt_paging, struct iommufd_device *idev) { int rc; @@ -334,20 +335,22 @@ static int iommufd_hwpt_paging_attach(struct iommufd_hw_pagetable *hwpt, /* Try to upgrade the domain we have */ if (idev->enforce_cache_coherency) { - rc = iommufd_hw_pagetable_enforce_cc(hwpt); + rc = iommufd_hwpt_paging_enforce_cc(hwpt_paging); if (rc) return rc; } - rc = iopt_table_enforce_dev_resv_regions(&hwpt->ioas->iopt, idev->dev, + rc = iopt_table_enforce_dev_resv_regions(&hwpt_paging->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); + rc = iommufd_group_setup_msi(idev->igroup, hwpt_paging); if (rc) { - iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); + iopt_remove_reserved_iova(&hwpt_paging->ioas->iopt, + idev->dev); return rc; } } @@ -367,7 +370,7 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, } if (hwpt_is_paging(hwpt)) { - rc = iommufd_hwpt_paging_attach(hwpt, idev); + rc = iommufd_hwpt_paging_attach(to_hwpt_paging(hwpt), idev); if (rc) goto err_unlock; } @@ -391,7 +394,8 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, return 0; err_unresv: if (hwpt_is_paging(hwpt)) - iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); + iopt_remove_reserved_iova(&to_hwpt_paging(hwpt)->ioas->iopt, + idev->dev); err_unlock: mutex_unlock(&idev->igroup->lock); return rc; @@ -409,7 +413,8 @@ iommufd_hw_pagetable_detach(struct iommufd_device *idev) idev->igroup->hwpt = NULL; } if (hwpt_is_paging(hwpt)) - iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev); + iopt_remove_reserved_iova(&to_hwpt_paging(hwpt)->ioas->iopt, + idev->dev); mutex_unlock(&idev->igroup->lock); /* Caller must destroy hwpt */ @@ -428,19 +433,20 @@ 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) +static void +iommufd_group_remove_reserved_iova(struct iommufd_group *igroup, + struct iommufd_hwpt_paging *hwpt_paging) { 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); + iopt_remove_reserved_iova(&hwpt_paging->ioas->iopt, cur->dev); } static int iommufd_group_do_replace_paging(struct iommufd_group *igroup, - struct iommufd_hw_pagetable *hwpt) + struct iommufd_hwpt_paging *hwpt_paging) { struct iommufd_hw_pagetable *old_hwpt = igroup->hwpt; struct iommufd_device *cur; @@ -451,27 +457,28 @@ static int iommufd_group_do_replace_paging(struct iommufd_group *igroup, /* Try to upgrade the domain we have */ list_for_each_entry(cur, &igroup->device_list, group_item) { if (cur->enforce_cache_coherency) { - rc = iommufd_hw_pagetable_enforce_cc(hwpt); + rc = iommufd_hwpt_paging_enforce_cc(hwpt_paging); if (rc) return rc; } } - if (hwpt_is_paging(old_hwpt) && hwpt->ioas != old_hwpt->ioas) { + if (hwpt_is_paging(old_hwpt) && + hwpt_paging->ioas != to_hwpt_paging(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); + &hwpt_paging->ioas->iopt, cur->dev, NULL); if (rc) goto err_unresv; } } - rc = iommufd_group_setup_msi(igroup, hwpt); + rc = iommufd_group_setup_msi(igroup, hwpt_paging); if (rc) goto err_unresv; return 0; err_unresv: - iommufd_group_remove_reserved_iova(igroup, hwpt); + iommufd_group_remove_reserved_iova(igroup, hwpt_paging); return rc; } @@ -498,7 +505,8 @@ iommufd_device_do_replace(struct iommufd_device *idev, } if (hwpt_is_paging(hwpt)) { - rc = iommufd_group_do_replace_paging(igroup, hwpt); + rc = iommufd_group_do_replace_paging(igroup, + to_hwpt_paging(hwpt)); if (rc) goto err_unlock; } @@ -509,8 +517,10 @@ iommufd_device_do_replace(struct iommufd_device *idev, 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); + (!hwpt_is_paging(hwpt) || + to_hwpt_paging(hwpt)->ioas != to_hwpt_paging(old_hwpt)->ioas)) + iommufd_group_remove_reserved_iova(igroup, + to_hwpt_paging(old_hwpt)); igroup->hwpt = hwpt; @@ -530,7 +540,8 @@ iommufd_device_do_replace(struct iommufd_device *idev, return old_hwpt; err_unresv: if (hwpt_is_paging(hwpt)) - iommufd_group_remove_reserved_iova(igroup, hwpt); + iommufd_group_remove_reserved_iova(igroup, + to_hwpt_paging(old_hwpt)); err_unlock: mutex_unlock(&idev->igroup->lock); return ERR_PTR(rc); @@ -558,6 +569,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, */ bool immediate_attach = do_attach == iommufd_device_do_attach; struct iommufd_hw_pagetable *destroy_hwpt; + struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; /* @@ -566,10 +578,11 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, * other. */ mutex_lock(&ioas->mutex); - list_for_each_entry(hwpt, &ioas->hwpt_list, hwpt_item) { - if (!hwpt->auto_domain) + list_for_each_entry(hwpt_paging, &ioas->hwpt_list, hwpt_item) { + if (!hwpt_paging->auto_domain) continue; + hwpt = &hwpt_paging->common; if (!iommufd_lock_obj(&hwpt->obj)) continue; destroy_hwpt = (*do_attach)(idev, hwpt); @@ -590,12 +603,13 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, goto out_unlock; } - hwpt = iommufd_hw_pagetable_alloc(idev->ictx, ioas, idev, - 0, immediate_attach); - if (IS_ERR(hwpt)) { - destroy_hwpt = ERR_CAST(hwpt); + hwpt_paging = iommufd_hwpt_paging_alloc(idev->ictx, ioas, idev, + 0, immediate_attach); + if (IS_ERR(hwpt_paging)) { + destroy_hwpt = ERR_CAST(hwpt_paging); goto out_unlock; } + hwpt = &hwpt_paging->common; if (!immediate_attach) { destroy_hwpt = (*do_attach)(idev, hwpt); @@ -605,7 +619,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, destroy_hwpt = NULL; } - hwpt->auto_domain = true; + hwpt_paging->auto_domain = true; *pt_id = hwpt->obj.id; iommufd_object_finalize(idev->ictx, &hwpt->obj); diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index e100caa502ed..52df5b2bb329 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -8,56 +8,60 @@ #include "../iommu-priv.h" #include "iommufd_private.h" -void iommufd_hw_pagetable_destroy(struct iommufd_object *obj) +void iommufd_hwpt_paging_destroy(struct iommufd_object *obj) { - struct iommufd_hw_pagetable *hwpt = - container_of(obj, struct iommufd_hw_pagetable, obj); + struct iommufd_hwpt_paging *hwpt_paging = + container_of(obj, struct iommufd_hwpt_paging, common.obj); - if (!list_empty(&hwpt->hwpt_item)) { - mutex_lock(&hwpt->ioas->mutex); - list_del(&hwpt->hwpt_item); - mutex_unlock(&hwpt->ioas->mutex); + if (!list_empty(&hwpt_paging->hwpt_item)) { + mutex_lock(&hwpt_paging->ioas->mutex); + list_del(&hwpt_paging->hwpt_item); + mutex_unlock(&hwpt_paging->ioas->mutex); - iopt_table_remove_domain(&hwpt->ioas->iopt, hwpt->domain); + iopt_table_remove_domain(&hwpt_paging->ioas->iopt, + hwpt_paging->common.domain); } - if (hwpt->domain) - iommu_domain_free(hwpt->domain); + if (hwpt_paging->common.domain) + iommu_domain_free(hwpt_paging->common.domain); - refcount_dec(&hwpt->ioas->obj.users); + refcount_dec(&hwpt_paging->ioas->obj.users); } -void iommufd_hw_pagetable_abort(struct iommufd_object *obj) +void iommufd_hwpt_paging_abort(struct iommufd_object *obj) { - struct iommufd_hw_pagetable *hwpt = - container_of(obj, struct iommufd_hw_pagetable, obj); + struct iommufd_hwpt_paging *hwpt_paging = + container_of(obj, struct iommufd_hwpt_paging, common.obj); /* The ioas->mutex must be held until finalize is called. */ - lockdep_assert_held(&hwpt->ioas->mutex); + lockdep_assert_held(&hwpt_paging->ioas->mutex); - if (!list_empty(&hwpt->hwpt_item)) { - list_del_init(&hwpt->hwpt_item); - iopt_table_remove_domain(&hwpt->ioas->iopt, hwpt->domain); + if (!list_empty(&hwpt_paging->hwpt_item)) { + list_del_init(&hwpt_paging->hwpt_item); + iopt_table_remove_domain(&hwpt_paging->ioas->iopt, + hwpt_paging->common.domain); } - iommufd_hw_pagetable_destroy(obj); + iommufd_hwpt_paging_destroy(obj); } -int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt) +int iommufd_hwpt_paging_enforce_cc(struct iommufd_hwpt_paging *hwpt_paging) { - if (hwpt->enforce_cache_coherency) + struct iommu_domain *paging_domain = hwpt_paging->common.domain; + + if (hwpt_paging->enforce_cache_coherency) return 0; - if (hwpt->domain->ops->enforce_cache_coherency) - hwpt->enforce_cache_coherency = - hwpt->domain->ops->enforce_cache_coherency( - hwpt->domain); - if (!hwpt->enforce_cache_coherency) + if (paging_domain->ops->enforce_cache_coherency) + hwpt_paging->enforce_cache_coherency = + paging_domain->ops->enforce_cache_coherency( + paging_domain); + if (!hwpt_paging->enforce_cache_coherency) return -EINVAL; return 0; } /** - * iommufd_hw_pagetable_alloc() - Get an iommu_domain for a device + * iommufd_hwpt_paging_alloc() - Get a PAGING iommu_domain for a device * @ictx: iommufd context * @ioas: IOAS to associate the domain with * @idev: Device to get an iommu_domain for @@ -72,12 +76,13 @@ int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt) * iommufd_object_abort_and_destroy() or iommufd_object_finalize() is called on * the returned hwpt. */ -struct iommufd_hw_pagetable * -iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, - struct iommufd_device *idev, u32 flags, - bool immediate_attach) +struct iommufd_hwpt_paging * +iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, + struct iommufd_device *idev, u32 flags, + bool immediate_attach) { const struct iommu_ops *ops = dev_iommu_ops(idev->dev); + struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; int rc; @@ -86,14 +91,17 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, if (flags && !ops->domain_alloc_user) return ERR_PTR(-EOPNOTSUPP); - hwpt = iommufd_object_alloc(ictx, hwpt, IOMMUFD_OBJ_HWPT_PAGING); - if (IS_ERR(hwpt)) - return hwpt; + hwpt_paging = __iommufd_object_alloc(ictx, hwpt_paging, + IOMMUFD_OBJ_HWPT_PAGING, + common.obj); + if (IS_ERR(hwpt_paging)) + return ERR_CAST(hwpt_paging); + hwpt = &hwpt_paging->common; - INIT_LIST_HEAD(&hwpt->hwpt_item); + INIT_LIST_HEAD(&hwpt_paging->hwpt_item); /* Pairs with iommufd_hw_pagetable_destroy() */ refcount_inc(&ioas->obj.users); - hwpt->ioas = ioas; + hwpt_paging->ioas = ioas; if (ops->domain_alloc_user) { hwpt->domain = ops->domain_alloc_user(idev->dev, flags, @@ -119,7 +127,7 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, * a new domain. */ if (idev->enforce_cache_coherency) { - rc = iommufd_hw_pagetable_enforce_cc(hwpt); + rc = iommufd_hwpt_paging_enforce_cc(hwpt_paging); if (WARN_ON(rc)) goto out_abort; } @@ -136,11 +144,11 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, goto out_abort; } - rc = iopt_table_add_domain(&hwpt->ioas->iopt, hwpt->domain); + rc = iopt_table_add_domain(&ioas->iopt, hwpt->domain); if (rc) goto out_detach; - list_add_tail(&hwpt->hwpt_item, &hwpt->ioas->hwpt_list); - return hwpt; + list_add_tail(&hwpt_paging->hwpt_item, &ioas->hwpt_list); + return hwpt_paging; out_detach: if (immediate_attach) @@ -153,6 +161,7 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) { struct iommu_hwpt_alloc *cmd = ucmd->cmd; + struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; struct iommufd_device *idev; struct iommufd_ioas *ioas; @@ -172,12 +181,13 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) } mutex_lock(&ioas->mutex); - hwpt = iommufd_hw_pagetable_alloc(ucmd->ictx, ioas, - idev, cmd->flags, false); - if (IS_ERR(hwpt)) { - rc = PTR_ERR(hwpt); + hwpt_paging = iommufd_hwpt_paging_alloc(ucmd->ictx, ioas, idev, + cmd->flags, false); + if (IS_ERR(hwpt_paging)) { + rc = PTR_ERR(hwpt_paging); goto out_unlock; } + hwpt = &hwpt_paging->common; cmd->out_hwpt_id = hwpt->obj.id; rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index 6244ffddee6e..a7ed384717a5 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -171,7 +171,7 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx, size_t size, enum iommufd_object_type type); -#define iommufd_object_alloc(ictx, ptr, type) \ +#define __iommufd_object_alloc(ictx, ptr, type, obj) \ container_of(_iommufd_object_alloc( \ ictx, \ sizeof(*(ptr)) + BUILD_BUG_ON_ZERO( \ @@ -180,6 +180,9 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx, type), \ typeof(*(ptr)), obj) +#define iommufd_object_alloc(ictx, ptr, type) \ + __iommufd_object_alloc(ictx, ptr, type, obj) + /* * The IO Address Space (IOAS) pagetable is a virtual page table backed by the * io_pagetable object. It is a user controlled mapping of IOVA -> PFNs. The @@ -231,8 +234,12 @@ int iommufd_vfio_ioas(struct iommufd_ucmd *ucmd); */ struct iommufd_hw_pagetable { struct iommufd_object obj; - struct iommufd_ioas *ioas; struct iommu_domain *domain; +}; + +struct iommufd_hwpt_paging { + struct iommufd_hw_pagetable common; + struct iommufd_ioas *ioas; bool auto_domain : 1; bool enforce_cache_coherency : 1; bool msi_cookie : 1; @@ -245,24 +252,32 @@ static inline bool hwpt_is_paging(struct iommufd_hw_pagetable *hwpt) return hwpt->obj.type == IOMMUFD_OBJ_HWPT_PAGING; } -struct iommufd_hw_pagetable * -iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, - struct iommufd_device *idev, u32 flags, - bool immediate_attach); -int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt); +static inline struct iommufd_hwpt_paging * +to_hwpt_paging(struct iommufd_hw_pagetable *hwpt) +{ + return container_of(hwpt, struct iommufd_hwpt_paging, common); +} + +struct iommufd_hwpt_paging * +iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, + struct iommufd_device *idev, u32 flags, + bool immediate_attach); +int iommufd_hwpt_paging_enforce_cc(struct iommufd_hwpt_paging *hwpt_paging); int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt, struct iommufd_device *idev); struct iommufd_hw_pagetable * iommufd_hw_pagetable_detach(struct iommufd_device *idev); -void iommufd_hw_pagetable_destroy(struct iommufd_object *obj); -void iommufd_hw_pagetable_abort(struct iommufd_object *obj); +void iommufd_hwpt_paging_destroy(struct iommufd_object *obj); +void iommufd_hwpt_paging_abort(struct iommufd_object *obj); int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd); static inline void iommufd_hw_pagetable_put(struct iommufd_ctx *ictx, struct iommufd_hw_pagetable *hwpt) { - lockdep_assert_not_held(&hwpt->ioas->mutex); - if (hwpt->auto_domain) + struct iommufd_hwpt_paging *hwpt_paging = to_hwpt_paging(hwpt); + + lockdep_assert_not_held(&hwpt_paging->ioas->mutex); + if (hwpt_paging->auto_domain) iommufd_object_deref_user(ictx, &hwpt->obj); else refcount_dec(&hwpt->obj.users); diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c index ad7c8c9ea46a..b4a24ef041e6 100644 --- a/drivers/iommu/iommufd/main.c +++ b/drivers/iommu/iommufd/main.c @@ -483,8 +483,8 @@ static const struct iommufd_object_ops iommufd_object_ops[] = { .destroy = iommufd_ioas_destroy, }, [IOMMUFD_OBJ_HWPT_PAGING] = { - .destroy = iommufd_hw_pagetable_destroy, - .abort = iommufd_hw_pagetable_abort, + .destroy = iommufd_hwpt_paging_destroy, + .abort = iommufd_hwpt_paging_abort, }, #ifdef CONFIG_IOMMUFD_TEST [IOMMUFD_OBJ_SELFTEST] = { diff --git a/drivers/iommu/iommufd/vfio_compat.c b/drivers/iommu/iommufd/vfio_compat.c index 6c810bf80f99..538fbf76354d 100644 --- a/drivers/iommu/iommufd/vfio_compat.c +++ b/drivers/iommu/iommufd/vfio_compat.c @@ -255,7 +255,7 @@ static int iommufd_vfio_unmap_dma(struct iommufd_ctx *ictx, unsigned int cmd, static int iommufd_vfio_cc_iommu(struct iommufd_ctx *ictx) { - struct iommufd_hw_pagetable *hwpt; + struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_ioas *ioas; int rc = 1; @@ -264,8 +264,8 @@ static int iommufd_vfio_cc_iommu(struct iommufd_ctx *ictx) return PTR_ERR(ioas); mutex_lock(&ioas->mutex); - list_for_each_entry(hwpt, &ioas->hwpt_list, hwpt_item) { - if (!hwpt->enforce_cache_coherency) { + list_for_each_entry(hwpt_paging, &ioas->hwpt_list, hwpt_item) { + if (!hwpt_paging->enforce_cache_coherency) { rc = 0; break; }