From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC3D7C433B4 for ; Fri, 23 Apr 2021 09:52:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD00D613C4 for ; Fri, 23 Apr 2021 09:52:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241968AbhDWJwy (ORCPT ); Fri, 23 Apr 2021 05:52:54 -0400 Received: from foss.arm.com ([217.140.110.172]:60782 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241184AbhDWJwx (ORCPT ); Fri, 23 Apr 2021 05:52:53 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 542591596; Fri, 23 Apr 2021 02:52:17 -0700 (PDT) Received: from usa.arm.com (a074945.blr.arm.com [10.162.16.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 2C41B3F774; Fri, 23 Apr 2021 02:52:12 -0700 (PDT) From: Vivek Gautam To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org Cc: joro@8bytes.org, will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com, jean-philippe@linaro.org, eric.auger@redhat.com, kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, Lorenzo.Pieralisi@arm.com, shameerali.kolothum.thodi@huawei.com, Vivek Gautam Subject: [PATCH RFC v1 04/11] iommu/virtio: Add a io page fault queue Date: Fri, 23 Apr 2021 15:21:40 +0530 Message-Id: <20210423095147.27922-5-vivek.gautam@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210423095147.27922-1-vivek.gautam@arm.com> References: <20210423095147.27922-1-vivek.gautam@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a io page fault queue to the driver so that it can be used to redirect faults to the handler. Signed-off-by: Vivek Gautam --- drivers/iommu/virtio-iommu.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index fd237cad1ce5..3da5f0807711 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -58,6 +58,7 @@ struct viommu_dev { struct list_head endpoints; struct workqueue_struct *pri_wq; struct viommu_dev_pri_work *pri_work; + struct iopf_queue *iopf_pri; /* Device configuration */ struct iommu_domain_geometry geometry; @@ -581,6 +582,15 @@ static int viommu_add_pstf(struct viommu_endpoint *vdev, void *pstf, size_t len) return 0; } +static int viommu_init_queues(struct viommu_dev *viommu) +{ + viommu->iopf_pri = iopf_queue_alloc(dev_name(viommu->dev)); + if (!viommu->iopf_pri) + return -ENOMEM; + + return 0; +} + static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) { int ret; @@ -670,6 +680,15 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) list_add(&ep->list, &viommu->endpoints); + ret = viommu_init_queues(viommu); + if (ret) + goto out_free_eps; + + kfree(probe); + return 0; + +out_free_eps: + kfree(ep); out_free: kfree(probe); return ret; -- 2.17.1