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Fri, 7 Aug 2026 22:18:35 +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 v7 01/15] s390/vfio-ap: Provide function to get the number of queues assigned to mdev Date: Fri, 7 Aug 2026 18:18:20 -0400 Message-ID: <20260807221834.562851-2-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260807221834.562851-1-akrowiak@linux.ibm.com> References: <20260807221834.562851-1-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: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=G6ws1dk5 c=1 sm=1 tr=0 ts=6a7659be cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=yQsB-kB7boqL7geEApIA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA3MDE3NSBTYWx0ZWRfX9p6ycuuHin59 sT7jtqlP1XHNezi4gEjQuiHMIit8T9kBnWEVtN1v7Kf6srDD2w1NILaV9pM3VZAuQRofbPaSsDT 25aG2K8iJuEKzfkk97N55vuKS9gkDwqExNiSMfFVyMAGakBg/DUtGZslE+3k6QCFmix90lsEFFj Wv1daW1iby+bISrhYsVw55TOJltGWi2wUgqnZRT0vlTA49vpx5E0SxVZpubehCJen+i9tjxW+bJ +8ac10XG55EgCbDJaRS3ccGsy3vrBBvCH845fS0oVwM8oBsDxhTw86PMfYIpM+XUqvyfVr3g1jQ AO2SXMD71L1VFWFr7lkv1pqQVaoKB0rJbrTSkbIqAmT1n8/yRzZY9pEaLpmBg0+sC1T/lVOEiC/ PwlQODFmqf8W96RKHtTbC6VrRsHEkgFlCpkR9u/mmegTCFPXX0vG0TRs0ujthbEG5WdwfpGCECp 8eXWRQ+W/MVzcPS8w8Q== X-Proofpoint-ORIG-GUID: 2n3yK7JLKC0yXvJ8QbT46ZJjR8f-j8BW X-Proofpoint-Spam-Info: AW1haW4tMjYwODA3MDE3NSBTYWx0ZWRfX7iKXtrS8d2dW Oo1VxWCaVul1vKG2VeuZ7sSGWZd7BrimVIPyqtqzyzBKKHZjph5QE24aMX2+5hVRUBAOzQSS9Vx U1Ck4AdsL2/n0LKQUM+Q0SmZMxgi7A8= X-Proofpoint-GUID: 2n3yK7JLKC0yXvJ8QbT46ZJjR8f-j8BW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-07_05,2026-08-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 phishscore=0 priorityscore=1501 adultscore=0 bulkscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608070175 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 | 8 ++++++++ drivers/s390/crypto/vfio_ap_private.h | 2 ++ 2 files changed, 10 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 44b3a1dcc1b3..36786d70a88f 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -2098,6 +2098,14 @@ 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) +{ + lockdep_assert_held(&matrix_dev->mdevs_lock); + + return bitmap_weight(ap_matrix->apm, AP_DEVICES) * + bitmap_weight(ap_matrix->aqm, AP_DOMAINS); +} + 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