From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752656AbeEGPNV (ORCPT ); Mon, 7 May 2018 11:13:21 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:60982 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752583AbeEGPMq (ORCPT ); Mon, 7 May 2018 11:12:46 -0400 From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com, akrowiak@linux.vnet.ibm.com Subject: [PATCH v5 12/13] s390: vfio-ap: implement VFIO_DEVICE_GET_INFO ioctl Date: Mon, 7 May 2018 11:11:51 -0400 X-Mailer: git-send-email 1.7.1 In-Reply-To: <1525705912-12815-1-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1525705912-12815-1-git-send-email-akrowiak@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050715-0012-0000-0000-0000162D3B6D X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008987; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000258; SDB=6.01028859; UDB=6.00525678; IPR=6.00807992; MB=3.00020972; MTD=3.00000008; XFM=3.00000015; UTC=2018-05-07 15:12:44 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050715-0013-0000-0000-000052A179A5 Message-Id: <1525705912-12815-13-git-send-email-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-07_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805070154 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduces ioctl access to the VFIO AP Matrix device driver by implementing the VFIO_DEVICE_GET_INFO ioctl. This ioctl provides the VFIO AP Matrix device driver information to the guest machine. Reviewed-by: Pierre Morel Signed-off-by: Tony Krowiak --- drivers/s390/crypto/vfio_ap_ops.c | 43 +++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 8866b0e..01a036f 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -113,6 +113,48 @@ static void vfio_ap_mdev_release(struct mdev_device *mdev) module_put(THIS_MODULE); } +static int vfio_ap_mdev_get_device_info(unsigned long arg) +{ + unsigned long minsz; + struct vfio_device_info info; + + minsz = offsetofend(struct vfio_device_info, num_irqs); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz) { + pr_err("%s: Argument size %u less than min size %li", + VFIO_AP_MODULE_NAME, info.argsz, minsz); + return -EINVAL; + } + + info.flags = VFIO_DEVICE_FLAGS_AP; + info.num_regions = 0; + info.num_irqs = 0; + + return copy_to_user((void __user *)arg, &info, minsz); +} + +static ssize_t vfio_ap_mdev_ioctl(struct mdev_device *mdev, + unsigned int cmd, unsigned long arg) +{ + int ret; + + switch (cmd) { + case VFIO_DEVICE_GET_INFO: + ret = vfio_ap_mdev_get_device_info(arg); + break; + default: + pr_err("%s: ioctl command %d is not a supported command", + VFIO_AP_MODULE_NAME, cmd); + ret = -EOPNOTSUPP; + break; + } + + return ret; +} + static ssize_t name_show(struct kobject *kobj, struct device *dev, char *buf) { return sprintf(buf, "%s\n", VFIO_AP_MDEV_NAME_HWVIRT); @@ -841,6 +883,7 @@ static ssize_t matrix_show(struct device *dev, struct device_attribute *attr, .remove = vfio_ap_mdev_remove, .open = vfio_ap_mdev_open, .release = vfio_ap_mdev_release, + .ioctl = vfio_ap_mdev_ioctl, }; int vfio_ap_mdev_register(struct ap_matrix *ap_matrix) -- 1.7.1