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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 647E3C43381 for ; Fri, 22 Feb 2019 15:30:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 304962089F for ; Fri, 22 Feb 2019 15:30:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727198AbfBVPaa (ORCPT ); Fri, 22 Feb 2019 10:30:30 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:41224 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726419AbfBVPa1 (ORCPT ); Fri, 22 Feb 2019 10:30:27 -0500 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1MFUI6e112358 for ; Fri, 22 Feb 2019 10:30:26 -0500 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2qtk602md2-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 22 Feb 2019 10:30:25 -0500 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 22 Feb 2019 15:30:08 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1MFU77k26869944 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 22 Feb 2019 15:30:07 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 221E45204F; Fri, 22 Feb 2019 15:30:07 +0000 (GMT) Received: from morel-ThinkPad-W530.boeblingen.de.ibm.com (unknown [9.152.224.140]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 9AA6052057; Fri, 22 Feb 2019 15:30:06 +0000 (GMT) From: Pierre Morel To: borntraeger@de.ibm.com Cc: alex.williamson@redhat.com, cohuck@redhat.com, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, frankja@linux.ibm.com, akrowiak@linux.ibm.com, pasic@linux.ibm.com, david@redhat.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, freude@linux.ibm.com, mimu@linux.ibm.com Subject: [PATCH v4 4/7] vfio: ap: register IOMMU VFIO notifier Date: Fri, 22 Feb 2019 16:29:57 +0100 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1550849400-27152-1-git-send-email-pmorel@linux.ibm.com> References: <1550849400-27152-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19022215-0016-0000-0000-00000259AA91 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19022215-0017-0000-0000-000032B40007 Message-Id: <1550849400-27152-5-git-send-email-pmorel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-02-22_11:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902220109 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To be able to use the VFIO interface to facilitate the mediated device memory pining/unpining we need to register a notifier for IOMMU. Signed-off-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 53 ++++++++++++++++++++++++++++++++--- drivers/s390/crypto/vfio_ap_private.h | 2 ++ 2 files changed, 51 insertions(+), 4 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 172d6eb..1b5130a 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -748,6 +748,36 @@ static const struct attribute_group *vfio_ap_mdev_attr_groups[] = { }; /** + * vfio_ap_mdev_iommu_notifier: IOMMU notifier callback + * + * @nb: The notifier block + * @action: Action to be taken (VFIO_IOMMU_NOTIFY_DMA_UNMAP) + * @data: the specific unmap structure for vfio_iommu_type1 + * + * Unpins the guest IOVA. (The NIB guest address we pinned before). + * Return NOTIFY_OK after unpining on a UNMAP request. + * otherwise, returns NOTIFY_DONE . + */ +static int vfio_ap_mdev_iommu_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct ap_matrix_mdev *matrix_mdev; + + matrix_mdev = container_of(nb, struct ap_matrix_mdev, iommu_notifier); + + if (action == VFIO_IOMMU_NOTIFY_DMA_UNMAP) { + struct vfio_iommu_type1_dma_unmap *unmap = data; + unsigned long g_pfn = unmap->iova >> PAGE_SHIFT; + + vfio_unpin_pages(mdev_dev(matrix_mdev->mdev), &g_pfn, 1); + return NOTIFY_OK; + } + + return NOTIFY_DONE; +} + + +/** * vfio_ap_mdev_set_kvm * * @matrix_mdev: a mediated matrix device @@ -846,12 +876,25 @@ static int vfio_ap_mdev_open(struct mdev_device *mdev) ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &events, &matrix_mdev->group_notifier); - if (ret) { - module_put(THIS_MODULE); - return ret; - } + if (ret) + goto err_group; + + matrix_mdev->iommu_notifier.notifier_call = vfio_ap_mdev_iommu_notifier; + events = VFIO_IOMMU_NOTIFY_DMA_UNMAP; + + ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, + &events, &matrix_mdev->iommu_notifier); + if (ret) + goto err_iommu; return 0; + +err_iommu: + vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, + &matrix_mdev->group_notifier); +err_group: + module_put(THIS_MODULE); + return ret; } static void vfio_ap_mdev_release(struct mdev_device *mdev) @@ -864,6 +907,8 @@ static void vfio_ap_mdev_release(struct mdev_device *mdev) vfio_ap_mdev_reset_queues(mdev); vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &matrix_mdev->group_notifier); + vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, + &matrix_mdev->iommu_notifier); matrix_mdev->kvm = NULL; module_put(THIS_MODULE); } diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 2760178..e535735 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -81,8 +81,10 @@ struct ap_matrix_mdev { struct list_head node; struct ap_matrix matrix; struct notifier_block group_notifier; + struct notifier_block iommu_notifier; struct kvm *kvm; struct list_head qlist; + struct mdev_device *mdev; }; extern int vfio_ap_mdev_register(void); -- 2.7.4