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 8C751C43441 for ; Thu, 22 Nov 2018 17:11:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5BF5D20864 for ; Thu, 22 Nov 2018 17:11:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5BF5D20864 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406316AbeKWDvw (ORCPT ); Thu, 22 Nov 2018 22:51:52 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:37266 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2404641AbeKWDvn (ORCPT ); Thu, 22 Nov 2018 22:51:43 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wAMH9DdK023943 for ; Thu, 22 Nov 2018 12:11:26 -0500 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0b-001b2d01.pphosted.com with ESMTP id 2nwxtamra8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 22 Nov 2018 12:11:26 -0500 Received: from localhost by e06smtp07.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) Thu, 22 Nov 2018 17:11:22 -0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wAMHBKCt56492100 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 22 Nov 2018 17:11:20 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6F74642045; Thu, 22 Nov 2018 17:11:20 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F361D4203F; Thu, 22 Nov 2018 17:11:19 +0000 (GMT) Received: from morel-ThinkPad-W530.boeblingen.de.ibm.com (unknown [9.152.224.168]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Nov 2018 17:11:19 +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 v2 3/3] vfio: ap: AP Queue Interrupt Control VFIO ioctl calls Date: Thu, 22 Nov 2018 18:11:15 +0100 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1542906675-7949-1-git-send-email-pmorel@linux.ibm.com> References: <1542906675-7949-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18112217-0028-0000-0000-0000031EF78E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18112217-0029-0000-0000-000023DB0552 Message-Id: <1542906675-7949-4-git-send-email-pmorel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-11-22_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=977 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1811220153 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is the implementation of the VFIO ioctl calls to handle the AQIC interception and use GISA to handle interrupts. Signed-off-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 110 +++++++++++++++++++++++++++++++++++++- 1 file changed, 109 insertions(+), 1 deletion(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 272ef42..f6e942f 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -895,12 +895,121 @@ static int vfio_ap_mdev_get_device_info(unsigned long arg) return copy_to_user((void __user *)arg, &info, minsz); } +static unsigned long vfio_ap_get_nib(struct kvm *kvm, struct vfio_ap_aqic *parm) +{ + struct s390_io_adapter *adapter; + struct s390_map_info *map; + unsigned long nib; + int found = 0; + + /* find the adapter */ + if (parm->adapter_id > MAX_S390_IO_ADAPTERS) + return 0; + + adapter = kvm->arch.adapters[parm->adapter_id]; + if (!adapter) + return 0; + + down_write(&adapter->maps_lock); + list_for_each_entry(map, &adapter->maps, list) { + if (map->guest_addr == parm->nib) { + found = 1; + break; + } + } + up_write(&adapter->maps_lock); + + if (!found) + return 0; + + nib = (unsigned long) page_address(map->page); + nib += (map->guest_addr & 0x0fff); + + return nib; +} + +static int vfio_ap_ioctl_setirq(struct mdev_device *mdev, unsigned long arg) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + struct vfio_ap_aqic parm; + struct ap_qirq_ctrl aqic_gisa = {}; + struct kvm *kvm = matrix_mdev->kvm; + struct kvm_s390_gisa *gisa = kvm->arch.gisa; + struct ap_queue_status ap_status; + unsigned long nib; + + if (copy_from_user(&parm, (void __user *)arg, sizeof(parm))) + return -EFAULT; + + if (parm.isc > MAX_ISC) + return -EINVAL; + + if (kvm->vcpus[0]->arch.sie_block->gd & 0x01) + aqic_gisa.gf = 1; + + nib = vfio_ap_get_nib(kvm, &parm); + if (!nib) + return -ENODEV; + + aqic_gisa.gisc = parm.isc; + aqic_gisa.isc = kvm_s390_gisc_register(kvm, parm.isc); + aqic_gisa.ir = 1; + aqic_gisa.gisa = gisa->next_alert >> 4; + + ap_status = ap_aqic(parm.apqn, aqic_gisa, (void *)nib); + parm.status = *(uint32_t *)(&ap_status); + + if (copy_to_user((void __user *)arg, &parm, sizeof(parm))) { + kvm_s390_gisc_unregister(kvm, parm.isc); + return -EFAULT; + } + + if (ap_status.response_code) { + kvm_s390_gisc_unregister(kvm, parm.isc); + return -EIO; + } + + return 0; +} + +static int vfio_ap_ioctl_clrirq(struct mdev_device *mdev, unsigned long arg) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + struct vfio_ap_aqic parm; + struct ap_qirq_ctrl aqic_gisa = {}; + struct ap_queue_status ap_status; + struct kvm *kvm = matrix_mdev->kvm; + + if (copy_from_user(&parm, (void __user *)arg, sizeof(parm))) + return -EFAULT; + + if (kvm->vcpus[0]->arch.sie_block->gd & 0x01) + aqic_gisa.gf = 1; + aqic_gisa.ir = 0; + + ap_status = ap_aqic(parm.apqn, aqic_gisa, NULL); + parm.status = *(uint32_t *)(&ap_status); + + kvm_s390_gisc_unregister(kvm, parm.isc); + + if (copy_to_user((void __user *)arg, &parm, sizeof(parm))) + return -EFAULT; + + return (ap_status.response_code) ? -EIO : 0; +} + static ssize_t vfio_ap_mdev_ioctl(struct mdev_device *mdev, unsigned int cmd, unsigned long arg) { int ret; switch (cmd) { + case VFIO_AP_SET_IRQ: + ret = vfio_ap_ioctl_setirq(mdev, arg); + break; + case VFIO_AP_CLEAR_IRQ: + ret = vfio_ap_ioctl_clrirq(mdev, arg); + break; case VFIO_DEVICE_GET_INFO: ret = vfio_ap_mdev_get_device_info(arg); break; @@ -911,7 +1020,6 @@ static ssize_t vfio_ap_mdev_ioctl(struct mdev_device *mdev, ret = -EOPNOTSUPP; break; } - return ret; } -- 2.7.4