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Wed, 25 Mar 2026 21:02:12 +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 Subject: [PATCH v1 20/24] s390-vfio-ap: Callback to get the current vfio device migration state Date: Wed, 25 Mar 2026 17:01:07 -0400 Message-ID: <20260325210149.888028-21-akrowiak@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260325210149.888028-1-akrowiak@linux.ibm.com> References: <20260325210149.888028-1-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: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: XrlngK-rxkO77sRrpwuaYZynZ4xQf7KL X-Authority-Analysis: v=2.4 cv=aMr9aL9m c=1 sm=1 tr=0 ts=69c44d58 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=3m_Bk1FAMoj1bHXj4eYA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI1MDE0OSBTYWx0ZWRfX1a3xCjX0EjGD 2z8NS8fXwf9HzGn6Y8cihezc/ywBkCESEn+9KsZEa/b5iqOL7Ft2c9hrNZZWWkYsgUGo/cj26pY e2K1j6SEvCINziiBqDdM429ZdOP9CHWxwi3q4D4EpS/HipyQ4NOISDl8vhUlBLzLZ5pSZ48yoLU vUeS8UolX5yu1vmzNhvdTRXEpLeTtrUiH00B1u+EGNcrm5o6SdfqZchsY4Gk/rMCBnqgWHxlv4e KgYJnPhHMUqxi9c5IPGa4AukofDTM3AhjnlSfGUKm+1g44IjPM2K8ty7UPW9AIu4yR9ivonGJmU oDmU/NYQHTj/1OWZVLpmzQCacK8koQK1C7W6sfxfS93e0Eqydp3LiMWI4N0REhjtPcaLMhAFZ9j JymxU2B2MqgFi3OgJVgOVMcUIeOC6TmspS9qEkOT2EIdXW0VcuXPbjHDaCMYxvEwFoMWxR26jVe 3dy7cFMWZ+jt0vG3J6w== X-Proofpoint-GUID: XrlngK-rxkO77sRrpwuaYZynZ4xQf7KL 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=2026-03-25_05,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 adultscore=0 impostorscore=0 malwarescore=0 suspectscore=0 phishscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250149 Content-Type: text/plain; charset="utf-8" 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 750299fb1a84..305fd3221be1 100644 --- a/drivers/s390/crypto/vfio_ap_migration.c +++ b/drivers/s390/crypto/vfio_ap_migration.c @@ -1014,7 +1014,18 @@ static struct file *vfio_ap_set_state(struct vfio_de= vice *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 =3D container_of(vdev, struct ap_matrix_mdev, vdev); + mig_data =3D matrix_mdev->mig_data; + *current_state =3D mig_data->mig_state; + + mutex_unlock(&matrix_dev->mdevs_lock); + + return 0; } =20 static int vfio_ap_get_data_size(struct vfio_device *vdev, --=20 2.52.0