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Wed, 11 Nov 2026 19:23:21 +0000 (GMT) Received: from li-4c4c4544-004d-4810-8043-b7c04f423534.ibm.com.com (unknown [9.61.182.62]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 11 Nov 2026 19:23:21 +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 v13 11/14] s390/vfio-ap: Callback to get the size of data to be migrated during guest migration Date: Wed, 11 Nov 2026 14:23:05 -0500 Message-ID: <20261111192308.2585984-12-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261111192308.2585984-1-akrowiak@linux.ibm.com> References: <20261111192308.2585984-1-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-Spam-Info: AW1haW4tMjYxMTExMDA3NiBTYWx0ZWRfXwiGiZ5S2ZYxg RBPXXZfqPvu2tvyJA2CrbT8mEI3aara88EHjkuavnFC6O/y4PnDSlb33H7NUZYjKOeUVXmW087O mg2LJ7YiUL/PXsDZyqQWd0vaCkhAH+A= X-Authority-Analysis: v=2.4 cv=GISdgeNK c=1 sm=1 tr=0 ts=6af4c0ac cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=vZ-Ft76KQvoWVpZ_:21 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=dNOmgfuV3ZSo10a98CMA:9 X-Proofpoint-GUID: mQt3DXgXULxkwLKVVWFqHOQZqLVKqpYr X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTExMDA3NiBTYWx0ZWRfX7PIBDqHuhe7Q ObPFta1GVs9ERk/U+z859W2m8CWIvmK7Nx0MpSfopF+PpWSvNwXrQRl8YCMonGQ5/+KtOZzU6FY K/ya8i3ioZ8sXhELAPWbDMboxFEqWzaTfeRSAwjsKvepy54Hn0iJ1QJUEWlUQA2KGn2W0mWQPF4 klfOmr7tDd8J2qELe5Z/NtUrlHNSuD414pTO6qHnZ+pQlpu1LlXEoWVH2X8tpboBK1y631pmg8s KUD18n3YpYkjH0Il9jxY3THYaTnGPT1rO5YH63Qe0mqHu90Kec+DYNWO+wNo8yQPQwzPy7J+5O9 PTpyc0f3K/82HzQjLvTsXSBKBec+cX0uiDjgSU3hduGSkUjPHCl58sagoBrbBxMxHj+yCu+zeN3 veuzMu2xj3Brk1lRZ/mvLyzfUNWQ5Axz61Yfks6o21sg1kQpbTXCEG+8J7QzI1OA5fsJ2Jrc+yb rit7nRbf+JE1JMTErPg== X-Proofpoint-ORIG-GUID: mQt3DXgXULxkwLKVVWFqHOQZqLVKqpYr 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=2026-11-11_05,2026-11-11_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 impostorscore=0 clxscore=1015 adultscore=0 priorityscore=1501 phishscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611110076 Callback to get the estimated data length of the data that will be required to complete reading of the vfio device's internal state. It's mandatory for VFIO_DEVICE_FEATURE_MIGRATION migration support. The function pointer for this callback is specified via the 'migration_get_data_size' field of the 'vfio_migration_ops' structure which is stored with the VFIO device when the 'vfio_device' structure representing the mediated device is initialized. Signed-off-by: Anthony Krowiak Reviewed-by: Jason J. Herne --- drivers/s390/crypto/vfio_ap_migration.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/s390/crypto/vfio_ap_migration.c b/drivers/s390/crypto/vfio_ap_migration.c index c6d4048b1299..4af734aeee17 100644 --- a/drivers/s390/crypto/vfio_ap_migration.c +++ b/drivers/s390/crypto/vfio_ap_migration.c @@ -1299,7 +1299,15 @@ static int vfio_ap_get_state(struct vfio_device *vdev, static int vfio_ap_get_data_size(struct vfio_device *vdev, unsigned long *stop_copy_length) { - return -EOPNOTSUPP; + struct ap_matrix_mdev *matrix_mdev; + int num_queues; + + mutex_lock(&matrix_dev->mdevs_lock); + matrix_mdev = container_of(vdev, struct ap_matrix_mdev, vdev); + *stop_copy_length = vfio_ap_config_size(matrix_mdev, &num_queues); + mutex_unlock(&matrix_dev->mdevs_lock); + + return 0; } static const struct vfio_migration_ops vfio_ap_migration_ops = { -- 2.53.0