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Tue, 7 Apr 2026 20:51:23 +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 v2 13/16] s390-vfio-ap: Callback to get the current vfio device migration state Date: Tue, 7 Apr 2026 16:50:29 -0400 Message-ID: <20260407205100.331150-14-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260407205100.331150-1-akrowiak@linux.ibm.com> References: <20260407205100.331150-1-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-Details-Enc: AW1haW4tMjYwNDA3MDE4OSBTYWx0ZWRfXwIxdg1ZxkAeg L5zl6fSo0eakVHI6NzhafIWOPVP1TdieLiwul5X5v6BOP17N+05RliUozIEkXv+BsHGJjbcSWYW zOnyZPBpXwajLpWGJwxttSUfmAItLB6U+7hqSdgiP1KhrfVEyIhq1l2aE8OX9dvxHUjc/HQdDu1 brJlznXx/SqWRwvaP89hXyG+kbf3fu3x6+cn2V9SAJQ/AmIkFxaQnUUU04wBN/8XOE8AWacApcQ Zd7LppWlI4niI0MKKcrH6SXxkI0IG3LiaTuVfIK7jK6X2iDxe+Yvap09wmp+kBbndSSFV8OUTYA a+B98/CgAFnWIC/qruaX5VEJ3o0QctC2KeIycJ4g0QfRFK4+b5kl11kC2w90j2km+7I0jvy30HD 0srqQZf3QISbgmiOG7WobnfuQa6Th3nh2wz7j9CWp4BuvbUP5D4Z08keSBt2iqaf6344cd7ujJi N3mA3WpVf/hCY4H3Ykg== X-Authority-Analysis: v=2.4 cv=FsY1OWrq c=1 sm=1 tr=0 ts=69d56e50 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=3m_Bk1FAMoj1bHXj4eYA:9 X-Proofpoint-ORIG-GUID: Go319cOfNfnfjOYl0wcwh8h_R5BZPY5t X-Proofpoint-GUID: Go319cOfNfnfjOYl0wcwh8h_R5BZPY5t X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-07_04,2026-04-07_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 impostorscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604070189 Implements the callback that returns the current vfio device migration state during live migration of guests with pass-through access to AP devices. The function pointer for this callback is specified via the 'migration_get_state' 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 --- drivers/s390/crypto/vfio_ap_migration.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/s390/crypto/vfio_ap_migration.c b/drivers/s390/crypto/vfio_ap_migration.c index 28209d8476d9..f9b219083e0f 100644 --- a/drivers/s390/crypto/vfio_ap_migration.c +++ b/drivers/s390/crypto/vfio_ap_migration.c @@ -1016,7 +1016,18 @@ static struct file *vfio_ap_set_state(struct vfio_device *vdev, static int vfio_ap_get_state(struct vfio_device *vdev, enum vfio_device_mig_state *current_state) { - return -EOPNOTSUPP; + struct ap_matrix_mdev *matrix_mdev; + struct vfio_ap_migration_data *mig_data; + + mutex_lock(&matrix_dev->mdevs_lock); + + matrix_mdev = container_of(vdev, struct ap_matrix_mdev, vdev); + mig_data = matrix_mdev->mig_data; + *current_state = mig_data->mig_state; + + mutex_unlock(&matrix_dev->mdevs_lock); + + return 0; } static int vfio_ap_get_data_size(struct vfio_device *vdev, -- 2.52.0