From nobody Mon Feb 9 07:19:05 2026 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 BA031EB64DD for ; Thu, 27 Jul 2023 05:52:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231233AbjG0Fwp (ORCPT ); Thu, 27 Jul 2023 01:52:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231600AbjG0FwI (ORCPT ); Thu, 27 Jul 2023 01:52:08 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6576B3A85; Wed, 26 Jul 2023 22:51:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690437107; x=1721973107; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wmvhOYuYE3uALXjAh/oLQV5kbPyvlH/DZyMYNAYmziM=; b=OvZ3EhI8hoIzRRcxw0zuHnM6LVqL6qB2Ng0xBzwmjRrOUW+zQ8wdbTRF WSnGSPnjpm6RwMMpSUdQwJea+0bL2SOj75fCplJ3sIW6XFH8XvMPsJWlQ h53UjJULERJ6FZK6zEpFbHCkcKIHZ6caX03iQLjBHWmmgoDeV6VgS1+em 6r8OVGYq3u+9rW1sa8PWY/XTjmEOjfT63Qjn59/qZScwIZLOSFMiDfkk3 xRdF+r8fFM6qPRhQ6ltLbeSBT6fw+0UN3Mn1LerLttORHB5yjcU6vRbGo DXp+QNOrZulIpvbEz7f7ebcnbzxJo1YfWvJ/Bu7twp/ARON8u6uW1i50z A==; X-IronPort-AV: E=McAfee;i="6600,9927,10783"; a="399152589" X-IronPort-AV: E=Sophos;i="6.01,234,1684825200"; d="scan'208";a="399152589" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jul 2023 22:51:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10783"; a="840585305" X-IronPort-AV: E=Sophos;i="6.01,234,1684825200"; d="scan'208";a="840585305" Received: from allen-box.sh.intel.com ([10.239.159.127]) by fmsmga002.fm.intel.com with ESMTP; 26 Jul 2023 22:51:12 -0700 From: Lu Baolu To: Joerg Roedel , Will Deacon , Robin Murphy , Jason Gunthorpe , Kevin Tian , Jean-Philippe Brucker , Nicolin Chen Cc: Yi Liu , Jacob Pan , iommu@lists.linux.dev, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v2 08/12] iommu: Prepare for separating SVA and IOPF Date: Thu, 27 Jul 2023 13:48:33 +0800 Message-Id: <20230727054837.147050-9-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230727054837.147050-1-baolu.lu@linux.intel.com> References: <20230727054837.147050-1-baolu.lu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Move iopf_group data structure to iommu.h. This is being done to make it a minimal set of faults that a domain's page fault handler should handle. Add two new helpers for the domain's page fault handler: - iopf_free_group: free a fault group after all faults in the group are handled. - iopf_queue_work: queue a given work item for a fault group. Signed-off-by: Lu Baolu --- include/linux/iommu.h | 12 ++++++++++ drivers/iommu/io-pgfault.c | 48 ++++++++++++++++++++++---------------- 2 files changed, 40 insertions(+), 20 deletions(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index cb12bab38365..607740e548f2 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -503,6 +503,18 @@ struct dev_iommu { u32 pci_32bit_workaround:1; }; =20 +struct iopf_fault { + struct iommu_fault fault; + struct list_head list; +}; + +struct iopf_group { + struct iopf_fault last_fault; + struct list_head faults; + struct work_struct work; + struct device *dev; +}; + int iommu_device_register(struct iommu_device *iommu, const struct iommu_ops *ops, struct device *hwdev); diff --git a/drivers/iommu/io-pgfault.c b/drivers/iommu/io-pgfault.c index 7e6697083f9d..1432751ff4d4 100644 --- a/drivers/iommu/io-pgfault.c +++ b/drivers/iommu/io-pgfault.c @@ -40,17 +40,17 @@ struct iopf_device_param { struct list_head partial; }; =20 -struct iopf_fault { - struct iommu_fault fault; - struct list_head list; -}; +static void iopf_free_group(struct iopf_group *group) +{ + struct iopf_fault *iopf, *next; =20 -struct iopf_group { - struct iopf_fault last_fault; - struct list_head faults; - struct work_struct work; - struct device *dev; -}; + list_for_each_entry_safe(iopf, next, &group->faults, list) { + if (!(iopf->fault.prm.flags & IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE)) + kfree(iopf); + } + + kfree(group); +} =20 static int iopf_complete_group(struct device *dev, struct iopf_fault *iopf, enum iommu_page_response_code status) @@ -71,9 +71,9 @@ static int iopf_complete_group(struct device *dev, struct= iopf_fault *iopf, =20 static void iopf_handler(struct work_struct *work) { + struct iopf_fault *iopf; struct iopf_group *group; struct iommu_domain *domain; - struct iopf_fault *iopf, *next; enum iommu_page_response_code status =3D IOMMU_PAGE_RESP_SUCCESS; =20 group =3D container_of(work, struct iopf_group, work); @@ -82,7 +82,7 @@ static void iopf_handler(struct work_struct *work) if (!domain || !domain->iopf_handler) status =3D IOMMU_PAGE_RESP_INVALID; =20 - list_for_each_entry_safe(iopf, next, &group->faults, list) { + list_for_each_entry(iopf, &group->faults, list) { /* * For the moment, errors are sticky: don't handle subsequent * faults in the group if there is an error. @@ -90,14 +90,20 @@ static void iopf_handler(struct work_struct *work) if (status =3D=3D IOMMU_PAGE_RESP_SUCCESS) status =3D domain->iopf_handler(&iopf->fault, domain->fault_data); - - if (!(iopf->fault.prm.flags & - IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE)) - kfree(iopf); } =20 iopf_complete_group(group->dev, &group->last_fault, status); - kfree(group); + iopf_free_group(group); +} + +static int iopf_queue_work(struct iopf_group *group, work_func_t func) +{ + struct iopf_device_param *iopf_param =3D group->dev->iommu->iopf_param; + + INIT_WORK(&group->work, func); + queue_work(iopf_param->queue->wq, &group->work); + + return 0; } =20 /** @@ -190,7 +196,6 @@ int iommu_queue_iopf(struct iommu_fault *fault, struct = device *dev) group->last_fault.fault =3D *fault; INIT_LIST_HEAD(&group->faults); list_add(&group->last_fault.list, &group->faults); - INIT_WORK(&group->work, iopf_handler); =20 /* See if we have partial faults for this group */ list_for_each_entry_safe(iopf, next, &iopf_param->partial, list) { @@ -199,8 +204,11 @@ int iommu_queue_iopf(struct iommu_fault *fault, struct= device *dev) list_move(&iopf->list, &group->faults); } =20 - queue_work(iopf_param->queue->wq, &group->work); - return 0; + ret =3D iopf_queue_work(group, iopf_handler); + if (ret) + iopf_free_group(group); + + return ret; =20 cleanup_partial: list_for_each_entry_safe(iopf, next, &iopf_param->partial, list) { --=20 2.34.1