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Fri, 24 Jul 2026 16:13:54 +0000 (GMT) Received: from li-4c4c4544-004d-4810-8043-b7c04f423534.ibm.com.com (unknown [9.61.50.28]) by smtpav06.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 24 Jul 2026 16:13:54 +0000 (GMT) From: Anthony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: jjherne@linux.ibm.com, borntraeger@de.ibm.com, mjrosato@linux.ibm.com, pasic@linux.ibm.com, alex@shazbot.org, kwankhede@nvidia.com, fiuczy@linux.ibm.com, pbonzini@redhat.com, frankja@linux.ibm.com, imbrenda@linux.ibm.com, agordeev@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com Subject: [PATCH v5 01/15] s390/vfio-ap: Provide function to get the number of queues assigned to mdev Date: Fri, 24 Jul 2026 12:13:37 -0400 Message-ID: <20260724161351.1802644-2-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260724161351.1802644-1-akrowiak@linux.ibm.com> References: <20260724161351.1802644-1-akrowiak@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI0MDE0NSBTYWx0ZWRfX/oFwh4a/IM6a hIY3U4GYe+/K3qGtAZRTxph6Qrb/sI8HpOXPhWNssSUGkj6AcyPTsOuYNlezERZCXMJQ+4N9qto G/46PjXyx4Nd2z5H+4/84cuFeTRR6bA= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI0MDE0NSBTYWx0ZWRfX9EuBhDF0+aa0 0/FSJ1jZYXvOLe+h4DE3riiFeFg3RNWMXlp2uDne3m8r5n/X9ka84MeUc3jaiOJYklM9alfdNbh AktLFVGiL6+V/BIXBh4EJ1BcCR60UXhlTGcePyrpdoqonavoq8HuW36EeTtPtZuxyMgozg7EUDJ oPJChAwNwrdbGJZ92XuKP0ArD+P97qyiDLflGKRxf2Am+l+w/VENLzQYLkgyACBxaSsWD2iw0FB q+/aALl9J/K/64wfcid3t9Qfhufd5FIlbZratH6s24k3YReOEbps3efAdRbXNTYqX+zPhFEwto+ 18HTZApu4mGjjg2CvjUHzGzIIwesoXzcpKCOVQ0C/OWw8T33IIY1QJN9Wiv7h8cdBEyjbu/qqZ6 8e9xPGRKQblVN0U1W3fzAgroLcrzNWW3KxxRWOPfMQWGysoMJClIlIAQ1PWijddCb8PilL+CI6F AaHjchbiOFDw+2y/Qhw== X-Authority-Analysis: v=2.4 cv=Q9LiJY2a c=1 sm=1 tr=0 ts=6a638f46 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=X0LuQLNI_Dy_l-hxe5EA:9 X-Proofpoint-ORIG-GUID: ORJxeYqobaHOx1ToSqZpoQdiABO5jaPe X-Proofpoint-GUID: ORJxeYqobaHOx1ToSqZpoQdiABO5jaPe X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-24_03,2026-07-24_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 adultscore=0 phishscore=0 bulkscore=0 spamscore=0 priorityscore=1501 impostorscore=0 suspectscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607240145 Provides a function that returns the number of queues that are or will be passed through to a guest when the mdev is attached to a guest. Signed-off-by: Anthony Krowiak --- drivers/s390/crypto/vfio_ap_ops.c | 14 ++++++++++++++ drivers/s390/crypto/vfio_ap_private.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 44b3a1dcc1b3..71d3e2c2e07c 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -2098,6 +2098,20 @@ static void vfio_ap_mdev_request(struct vfio_device *vdev, unsigned int count) release_update_locks_for_mdev(matrix_mdev); } +int vfio_ap_mdev_get_num_queues(struct ap_matrix *ap_matrix) +{ + unsigned long apid, apqi; + int num_queues = 0; + + lockdep_assert_held(&matrix_dev->mdevs_lock); + + for_each_set_bit_inv(apid, ap_matrix->apm, AP_DEVICES) + for_each_set_bit_inv(apqi, ap_matrix->aqm, AP_DOMAINS) + num_queues++; + + return num_queues; +} + static int vfio_ap_mdev_get_device_info(unsigned long arg) { unsigned long minsz; diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 9bff666b0b35..9677e49554d7 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -152,6 +152,8 @@ struct vfio_ap_queue { struct work_struct reset_work; }; +int vfio_ap_mdev_get_num_queues(struct ap_matrix *ap_matrix); + int vfio_ap_mdev_register(void); void vfio_ap_mdev_unregister(void); -- 2.53.0