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envelope-from=akrowiak@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 4/10/26 4:19 AM, Cédric Le Goater wrote: > On 4/9/26 16:13, Anthony Krowiak wrote: >> From: Anthony  Krowiak >> >> Implements the callbacks used by the VFIO migration framework to migrate >> guests with pass-through access to s390 crypto devices. >> >> Signed-off-by: Anthony Krowiak >> --- >>   hw/vfio/ap.c | 43 +++++++++++++++++++++++++++++++++++++++---- >>   1 file changed, 39 insertions(+), 4 deletions(-) >> >> diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c >> index fd68983702..49947b18c3 100644 >> --- a/hw/vfio/ap.c >> +++ b/hw/vfio/ap.c >> @@ -32,6 +32,7 @@ >>   #include "hw/s390x/ap-bridge.h" >>   #include "system/address-spaces.h" >>   #include "qom/object.h" >> +#include "vfio-migration-internal.h" >>     #define TYPE_VFIO_AP_DEVICE      "vfio-ap" >>   @@ -47,6 +48,7 @@ static const VMStateDescription vmstate_ap_device >> = { >>       .name = "vfio-ap-device", >>       .version_id = 1, >>       .minimum_version_id = 1, >> +    .unmigratable = 0, > > unneeded. I'll remove it > >>       .fields = (const VMStateField[]) { >>           VMSTATE_END_OF_LIST() >>       }, >> @@ -66,17 +68,44 @@ static void __attribute__((constructor)) >> vfio_ap_global_init(void) >>       qemu_mutex_init(&cfg_chg_events_lock); >>   } >>   +static int vfio_ap_save_config(VFIODevice *vdev, QEMUFile *f, >> Error **errp) >> +{ >> +    VFIOAPDevice *vapdev = container_of(vdev, VFIOAPDevice, vdev); >> + >> +    return vmstate_save_state(f, &vmstate_ap_device, vapdev, NULL, >> errp); >> +} >> + >> +static int vfio_ap_load_config(VFIODevice *vdev, QEMUFile *f) >> +{ >> +    VFIOAPDevice *vapdev = container_of(vdev, VFIOAPDevice, vdev); >> +    Error *err = NULL; >> +    int ret; >> + >> +    ret = vmstate_load_state(f, &vmstate_ap_device, vapdev, 1, &err); >> +    if (ret) { >> +        error_report_err(err); >> +    } >> + >> +    return ret; >> +} >> + >> +static Object *vfio_ap_get_object(VFIODevice *vbasedev) >> +{ >> +    VFIOAPDevice *vdev = container_of(vbasedev, VFIOAPDevice, vdev); >> + >> +    return OBJECT(vdev); >> +} >> + >>   static void vfio_ap_compute_needs_reset(VFIODevice *vdev) >>   { >>       vdev->needs_reset = false; >>   } >>   -/* >> - * We don't need vfio_hot_reset_multi and vfio_eoi operations for >> - * vfio-ap device now. >> - */ >>   struct VFIODeviceOps vfio_ap_ops = { >>       .vfio_compute_needs_reset = vfio_ap_compute_needs_reset, >> +    .vfio_save_config = vfio_ap_save_config, >> +    .vfio_load_config = vfio_ap_load_config, >> +    .vfio_get_object = vfio_ap_get_object, >>   }; >>     static void vfio_ap_req_notifier_handler(void *opaque) >> @@ -251,6 +280,10 @@ static void vfio_ap_realize(DeviceState *dev, >> Error **errp) >>           goto error; >>       } >>   +    if (!vfio_migration_realize(vbasedev, errp)) { >> +        goto error; >> +    } >> + >>       if (!vfio_ap_register_irq_notifier(vapdev, >> VFIO_AP_REQ_IRQ_INDEX, &err)) { >>           /* >>            * Report this error, but do not make it a failing condition. >> @@ -287,6 +320,8 @@ static void vfio_ap_unrealize(DeviceState *dev) >>     static const Property vfio_ap_properties[] = { >>       DEFINE_PROP_STRING("sysfsdev", VFIOAPDevice, vdev.sysfsdev), >> +    DEFINE_PROP_ON_OFF_AUTO("enable-migration", VFIOAPDevice, >> +                            vdev.enable_migration, ON_OFF_AUTO_ON), > > Why not ON_OFF_AUTO_AUTO ? This would enable migration only if kernel > has migration support. If not, the VM would still start but migration > would be blocked. I will make that change but I'm wondering; how does QEMU know whether the kernel has support for migration of vfio-ap devices or not? > > > thanks, > > C. > > >>   #ifdef CONFIG_IOMMUFD >>       DEFINE_PROP_LINK("iommufd", VFIOAPDevice, vdev.iommufd, >>                        TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *), >