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Wed, 25 Mar 2026 21:01:53 +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 Subject: [PATCH v1 03/24] s390/vfio-ap: Provide access to queue objects and related info Date: Wed, 25 Mar 2026 17:00:50 -0400 Message-ID: <20260325210149.888028-4-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260325210149.888028-1-akrowiak@linux.ibm.com> References: <20260325210149.888028-1-akrowiak@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 2vgpeMwLyBN22ESXqbu0ufsXYy6JvTqI X-Proofpoint-ORIG-GUID: 2vgpeMwLyBN22ESXqbu0ufsXYy6JvTqI X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI1MDE0OSBTYWx0ZWRfX3mecj5MxGQ9G 8TL4ce0M2rn5yeT04+3tMUvNP5FPPOFbz7EnR55jnsqnmOCaJD/p3bHoHvmeRhrO0DwNQrot72j Gz3fwUe05W3N3ohTgPbran60x40FoylDdmDFsZ7UX9KgmWkbr5FxcvX5Chypbt0qSkNqshHZzWL 2/+wxMMhOt7Zm0WtFXw5RKppWV5tsNSroGIVPXfWVuT8KCy6uDGkki3BjqHtts9SgWQD67JOHUz DNzDqnP0KvD+DEZlXfH6QxEQjPo23XWZpF8ZM77F2WmGDJRGT3p7ObqkluEoZ9t1J5SJVElI7sO dtd1xe3atJUhT750ruKEUWwgU5QUWVRbFpbz9Rfncha1Fi/HHPbzkuGt+yEQMGg0Hs6WgvnNX8Z TzvQT+LwiAymQT6S9tLDlJNliJ9otFjknLbixxhgnWb7z5BW2czb08GmoDvQnESrz78H9+EpLd1 nSlNs3QKeaQKhStx2LA== X-Authority-Analysis: v=2.4 cv=KbXfcAYD c=1 sm=1 tr=0 ts=69c44d45 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=aJOwoqrUralclMrAr6UA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-25_05,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 clxscore=1011 priorityscore=1501 bulkscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250149 Content-Type: text/plain; charset="utf-8" Provide the following: 1. A function that returns a struct vfio_ap_queue object representing a queue that is bound to the vfio_ap device driver and is assigned to an mdev 2. 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. There is already a function for #1; however, it is a static function in drivers/s390/crypto/vfio_ap_ops.c. The function will be defined in the drivers/s390/crypto/vfio_ap_private.h file and made non-static. Note that it would probably make sense to ensure that the mdevs_lock is held for this function, so a call to lockdep_assert_held(&matrix_dev->mdevs_lock) will be added to the function implementation. Signed-off-by: Anthony Krowiak --- drivers/s390/crypto/vfio_ap_ops.c | 20 +++++++++++++++++--- drivers/s390/crypto/vfio_ap_private.h | 4 ++++ 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_a= p_ops.c index ef3101f6865e..cd85866b81a0 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -203,12 +203,12 @@ static inline void get_update_locks_for_queue(struct = vfio_ap_queue *q) * Return: the pointer to the vfio_ap_queue struct representing the queue = or * NULL if the queue is not assigned to @matrix_mdev */ -static struct vfio_ap_queue *vfio_ap_mdev_get_queue( - struct ap_matrix_mdev *matrix_mdev, - int apqn) +struct vfio_ap_queue *vfio_ap_mdev_get_queue(struct ap_matrix_mdev *matrix= _mdev, int apqn) { struct vfio_ap_queue *q; =20 + lockdep_assert_held(&matrix_dev->mdevs_lock); + hash_for_each_possible(matrix_mdev->qtable.queues, q, mdev_qnode, apqn) { if (q && q->apqn =3D=3D apqn) @@ -2098,6 +2098,20 @@ static void vfio_ap_mdev_request(struct vfio_device = *vdev, unsigned int count) release_update_locks_for_mdev(matrix_mdev); } =20 +int vfio_ap_mdev_get_num_queues(struct ap_matrix *ap_matrix) +{ + unsigned long apid, apqi; + int num_queues =3D 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/vf= io_ap_private.h index 39c85bab05c3..d66586825ef4 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -153,6 +153,10 @@ struct vfio_ap_queue { struct ap_tapq_hwinfo hwinfo; }; =20 +struct vfio_ap_queue *vfio_ap_mdev_get_queue(struct ap_matrix_mdev *matrix= _mdev, int apqn); + +int vfio_ap_mdev_get_num_queues(struct ap_matrix *ap_matrix); + int vfio_ap_mdev_register(void); void vfio_ap_mdev_unregister(void); =20 --=20 2.52.0