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Tue, 24 Nov 2020 21:40:31 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CE76FAE05F; Tue, 24 Nov 2020 21:40:29 +0000 (GMT) Received: from cpe-66-24-58-13.stny.res.rr.com.com (unknown [9.85.195.249]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 24 Nov 2020 21:40:29 +0000 (GMT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, mjrosato@linux.ibm.com, pasic@linux.ibm.com, alex.williamson@redhat.com, kwankhede@nvidia.com, fiuczy@linux.ibm.com, frankja@linux.ibm.com, david@redhat.com, hca@linux.ibm.com, gor@linux.ibm.com, Tony Krowiak Subject: [PATCH v12 04/17] s390/vfio-ap: No need to disable IRQ after queue reset Date: Tue, 24 Nov 2020 16:40:03 -0500 Message-Id: <20201124214016.3013-5-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20201124214016.3013-1-akrowiak@linux.ibm.com> References: <20201124214016.3013-1-akrowiak@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-24_08:2020-11-24,2020-11-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=11 priorityscore=1501 lowpriorityscore=0 bulkscore=0 spamscore=0 phishscore=0 mlxscore=0 mlxlogscore=999 clxscore=1015 impostorscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011240125 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The queues assigned to a matrix mediated device are currently reset when: * The VFIO_DEVICE_RESET ioctl is invoked * The mdev fd is closed by userspace (QEMU) * The mdev is removed from sysfs. Immediately after the reset of a queue, a call is made to disable interrupts for the queue. This is entirely unnecessary because the reset of a queue disables interrupts, so this will be removed. Signed-off-by: Tony Krowiak --- drivers/s390/crypto/vfio_ap_ops.c | 28 +++++----------------------- 1 file changed, 5 insertions(+), 23 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 8e6972495daa..dc699fd54505 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -26,14 +26,6 @@ static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev); -static int match_apqn(struct device *dev, const void *data) -{ - struct vfio_ap_queue *q = dev_get_drvdata(dev); - - return (q->apqn == *(int *)(data)) ? 1 : 0; -} - - /** * vfio_ap_get_queue: Retrieve a queue with a specific APQN. * @matrix_mdev: the associated mediated matrix @@ -1121,20 +1113,6 @@ static int vfio_ap_mdev_group_notifier(struct notifier_block *nb, return NOTIFY_OK; } -static void vfio_ap_irq_disable_apqn(int apqn) -{ - struct device *dev; - struct vfio_ap_queue *q; - - dev = driver_find_device(&matrix_dev->vfio_ap_drv->driver, NULL, - &apqn, match_apqn); - if (dev) { - q = dev_get_drvdata(dev); - vfio_ap_irq_disable(q); - put_device(dev); - } -} - static int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi, unsigned int retry) { @@ -1169,6 +1147,7 @@ static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev) { int ret; int rc = 0; + struct vfio_ap_queue *q; unsigned long apid, apqi; struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); @@ -1184,7 +1163,10 @@ static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev) */ if (ret) rc = ret; - vfio_ap_irq_disable_apqn(AP_MKQID(apid, apqi)); + + q = vfio_ap_get_queue(matrix_mdev, AP_MKQID(apid, apqi); + if (q) + vfio_ap_free_aqic_resources(q); } } -- 2.21.1