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Tue, 7 Jul 2026 09:02:28 +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 v4 01/15] s390/vfio-ap: Provide function to get the number of queues assigned to mdev Date: Tue, 7 Jul 2026 05:02:03 -0400 Message-ID: <20260707090226.3206695-2-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260707090226.3206695-1-akrowiak@linux.ibm.com> References: <20260707090226.3206695-1-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: AW1haW4tMjYwNzA3MDA4NCBTYWx0ZWRfX1xC+7EsmjFov wZYoknSUdJw3H4iGTfc6WmvK2xQlPed/i2zFgj8lAVIxn9/ljqGwUCsLr6QyZ7mE6vrxC96ohUT /mV6leTzcDTeyB1haMSUcUF+fGjXAKk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA3MDA4NCBTYWx0ZWRfX99Y9UmZ8akV0 2h3rAvIXWcBEEibHcmhJpntrjgdTaCeRg/ATb6Kbpp8DuHVji8gNEF87/Ir7oxF0dBt6JbAJ8FT 9ZPf2p1+I3u4o48fue6jniaKyi+Vf6Zr678iL35OZJ21x2tUKF3wXect4wii3vUfR59KUmqbdK2 ceMhKanC5DDJ3HM7LISExudDSjf8T66gyv//dbe8vRUNPe3/GiHVTMXVAkLguFR0VNkvEtfa/to mGoJ7YKU6DmFEp0J+47rIDmac02IkrhT/6Lpq+LbAx6Q7jlIvOISMTzFKYCUsjRfnxyTIjtEG4D V/9WW9QYIMWPKfcHB/G4J/21uxBL/HX2MI+kE/YG3/z3I2b9XslXArKT7REZyJlucCkK4mQbws1 btvdmoAiuIvC+2+pYUHi5wUsTKor8NCQM/hq71jKtewKlOIN56PPTLF4Ys8FhLtxyIYAkMiZEvm FfyCzkPyH5hvMmLti/w== X-Proofpoint-GUID: 4dVwoPzvYzBI_Aj370xNXpkXL0hrLgzx X-Authority-Analysis: v=2.4 cv=Oot/DS/t c=1 sm=1 tr=0 ts=6a4cc0a7 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==: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: 4dVwoPzvYzBI_Aj370xNXpkXL0hrLgzx 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=2026-07-07_02,2026-07-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 phishscore=0 malwarescore=0 suspectscore=0 spamscore=0 adultscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607070084 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