From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Krowiak Subject: [RFC 14/19] KVM: s390: Connect the AP mediated matrix device to KVM Date: Fri, 13 Oct 2017 13:38:59 -0400 Message-ID: <1507916344-3896-15-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1507916344-3896-1-git-send-email-akrowiak@linux.vnet.ibm.com> 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, qemu-s390x@nongnu.org, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Return-path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:40003 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753251AbdJMRkK (ORCPT ); Fri, 13 Oct 2017 13:40:10 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v9DHcvBm142357 for ; Fri, 13 Oct 2017 13:40:09 -0400 Received: from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206]) by mx0b-001b2d01.pphosted.com with ESMTP id 2djyevegam-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 13 Oct 2017 13:40:09 -0400 Received: from localhost by e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 13 Oct 2017 13:40:08 -0400 In-Reply-To: <1507916344-3896-1-git-send-email-akrowiak@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: Registers a group notifier during the open of the mediated device to get information on KVM presence through the VFIO_GROUP_NOTIFY_SET_KVM event. When notified, save the pointer to KVM inside mediated matrix device structure. Signed-off-by: Tony Krowiak --- drivers/s390/crypto/vfio_ap_matrix_ops.c | 43 ++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_matrix_ops.c b/drivers/s390/crypto/vfio_ap_matrix_ops.c index 10a006c..fd36074 100644 --- a/drivers/s390/crypto/vfio_ap_matrix_ops.c +++ b/drivers/s390/crypto/vfio_ap_matrix_ops.c @@ -12,6 +12,9 @@ #include #include #include +#include +#include +#include #include "vfio_ap_matrix_private.h" @@ -24,6 +27,8 @@ struct ap_matrix_mdev { struct mdev_device *mdev; struct list_head node; struct ap_config_masks masks; + struct notifier_block group_notifier; + struct kvm *kvm; }; struct ap_matrix *matrix; @@ -97,6 +102,41 @@ static int ap_matrix_mdev_remove(struct mdev_device *mdev) return 0; } +static int ap_matrix_mdev_group_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, group_notifier); + + if (action == VFIO_GROUP_NOTIFY_SET_KVM) + matrix_mdev->kvm = data; + + return NOTIFY_OK; +} + +static int ap_matrix_mdev_open(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + unsigned long events; + int ret; + + matrix_mdev->group_notifier.notifier_call = + ap_matrix_mdev_group_notifier; + events = VFIO_GROUP_NOTIFY_SET_KVM; + ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, + &events, &matrix_mdev->group_notifier); + return ret; +} + +static void ap_matrix_mdev_release(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); + + vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, + &matrix_mdev->group_notifier); +} + static ssize_t name_show(struct kobject *kobj, struct device *dev, char *buf) { return sprintf(buf, "%s\n", AP_MATRIX_MDEV_NAME_HWVIRT); @@ -609,6 +649,9 @@ static DEVICE_ATTR(control_domains, 0644, ap_matrix_control_domains_show, .mdev_attr_groups = ap_matrix_mdev_attr_groups, .create = ap_matrix_mdev_create, .remove = ap_matrix_mdev_remove, + .open = ap_matrix_mdev_open, + .release = ap_matrix_mdev_release, + }; int ap_matrix_mdev_register(struct ap_matrix *ap_matrix) -- 1.7.1