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Mon, 2 Nov 2026 15:16:06 +0000 (GMT) Received: from li-4c4c4544-004d-4810-8043-b7c04f423534.ibm.com.com (unknown [9.61.57.150]) by smtpav03.wdc07v.mail.ibm.com (Postfix) with ESMTP; Mon, 2 Nov 2026 15:16:06 +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, 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 Subject: [PATCH v11 01/14] s390/vfio-ap: Provide function to get the number of queues assigned to mdev Date: Mon, 2 Nov 2026 10:14:41 -0500 Message-ID: <20261102151604.2150055-2-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261102151604.2150055-1-akrowiak@linux.ibm.com> References: <20261102151604.2150055-1-akrowiak@linux.ibm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: xpYKbzNFAAmSo4fXS5gIO6Srwvxfs-VX X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTAyMDA2MCBTYWx0ZWRfX8zm2Iq6gb1uG gMROOw8P9GmMnzLw95F0aQ9eL+JZvyKJl4kOfgkL0CzlyW2osV3Pxt2Wzu5B+UfceM7LE6Ap5uM KapjD5YxMnrsJ3K/WqYjPcj0RJmb1bcsEz63Zy+ey+/mysDLGWyO9UzBmvKxP29tvhiJAE8vNTZ DyhJzrEUmc+QIYuF/6CgSEZelGDiApqAb0pOmE68srmjf0Ot13/VLrfPskXIFgsS2ys44ba1vUf gt90LQuAZ6CH8dlQD3FypKrcH98/bH0WyFS1VAWp2NC0/cewBnKAbvaELD1a/bRehUVE5E9i4CK g6hoip2vZOnMaKx4dZ8pdviOZGEX/DKNtQBe+Yv3jOshZLjHTZRiFNQpPM0QcmLjYQxg/Kj8fCp 6lXqDoFIysZVsi2LERqqesCu2YG9eDdukhfFM8j85Zl11t2ABSOcXLPVa2bTTMGp0002NjjWwNp TGuRINajwLf58bzjYlg== X-Proofpoint-Spam-Info: AW1haW4tMjYxMTAyMDA2MCBTYWx0ZWRfX2UPOQo+ewdtt CgDXOsoHZllELMu9fzfdbINKTa+Xft32qntVt3dj10cisiafAPpXxedzMJz95bj68B8/yq+Tx7S shoqQ+pAdAhn+ccZaNXr7B+XpHvzQQU= X-Authority-Analysis: v=2.4 cv=QK391QLL c=1 sm=1 tr=0 ts=6ae8a939 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=yQsB-kB7boqL7geEApIA:9 X-Proofpoint-ORIG-GUID: xpYKbzNFAAmSo4fXS5gIO6Srwvxfs-VX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-02_04,2026-11-02_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611020060 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 Reviewed-by: Jason J. Herne --- 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 373ce574c431..83ba4193bdc3 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -2113,6 +2113,14 @@ static void vfio_ap_mdev_request(struct vfio_device *vdev, unsigned int count) release_update_locks_for_mdev(matrix_mdev); } +unsigned 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..12d7d240addd 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; }; +unsigned 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