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Tue, 30 Jun 2026 10:41:34 +0000 (GMT) Received: from li-4c4c4544-004d-4810-8043-b7c04f423534.ibm.com.com (unknown [9.61.135.84]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Tue, 30 Jun 2026 10:41:34 +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 v3 01/15] s390/vfio-ap: Provide function to get the number of queues assigned to mdev Date: Tue, 30 Jun 2026 06:41:11 -0400 Message-ID: <20260630104132.1598851-2-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260630104132.1598851-1-akrowiak@linux.ibm.com> References: <20260630104132.1598851-1-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-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjMwMDA5MyBTYWx0ZWRfXxN8YoqoobeOg L9iGR7jf2A8dw0znL/UBZZnWPu1FAkL1Slqu96teLYsJykyqWucP0LzpZ1aTLpJololYK+L8NsY 64GNiOCT4D1nnV9qrGpzwoTBf+J8gL7n81eRZASmB19c1+zcJ/0xvemhxlHZ3VmbzJ4c62MQnSC 0LgaN0C2fH3Dbj9ahoW3lqhakbKWJF5fhEEToDEnljua3BSme6FfpX5sWvfOovtglOANX04d/O9 74E6OEyR8C3eqODJN9rHEQHQnUqDpNFlqtbgdFR3/UbPMXWc9f6e4dXUoAp8bFM/8vja3qOK+9U OJsr9fXPJO1Z8uK2lrnaNt2imiNxAv7//1fNG+lbgz+lUN5viF4lGCjGrGmcWPjPCyeI4s8Rj4i OsPv95yyqYpao9ppl2KZZaeh92IhS7AeGiURYeI4d2UWaFAvd2eft4z9fv7pxlSnKmrKufaSQSs OfLQhHtfClgZeaz3S0A== X-Proofpoint-GUID: 3HLA3iPku_TEFEDemZlR7xVuTXiVFYp2 X-Authority-Analysis: v=2.4 cv=Z8bc2nRA c=1 sm=1 tr=0 ts=6a439d62 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=X0LuQLNI_Dy_l-hxe5EA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjMwMDA5MyBTYWx0ZWRfX15aLAsKJvnKH 6cMqO3I5n0VUze4O8MSXxfGKXd+tC0DTORi9wasnVPt0OolQOoiKfimjfCrO51kMGPPkjon6xNZ 0iqc4TN/+WuJ+/GThEwBAf72CMcD0cY= X-Proofpoint-ORIG-GUID: 3HLA3iPku_TEFEDemZlR7xVuTXiVFYp2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-30_03,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 spamscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606300093 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