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vfio: Set the priority of the VFIO VM state change handler explicitly 

In the VFIO VM state change handler when stopping the VM, the _RUNNING
bit in device_state is cleared which makes the VFIO device stop, including
no longer generating interrupts. Then we can save the pending states of
all interrupts in the GIC VM state change handler (on ARM).

So we have to set the priority of the VFIO VM state change handler
explicitly (like virtio devices) to ensure it is called before the
GIC's in saving.

Signed-off-by: Shenming Lu <lushenming@huawei.com>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20210310030233.1133-3-lushenming@huawei.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Shenming Lu 2021-03-10 11:02:32 +08:00 committed by Alex Williamson
parent d329f5032e
commit 8ce1ff990e
1 changed files with 2 additions and 1 deletions
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3
hw/vfio/migration.c
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@ -862,7 +862,8 @@ static int vfio_migration_init(VFIODevice *vbasedev,
register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1, &savevm_vfio_handlers, register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1, &savevm_vfio_handlers,
vbasedev); vbasedev);
migration->vm_state = qemu_add_vm_change_state_handler(vfio_vmstate_change, migration->vm_state = qdev_add_vm_change_state_handler(vbasedev->dev,
vfio_vmstate_change,
vbasedev); vbasedev);
migration->migration_state.notify = vfio_migration_state_notifier; migration->migration_state.notify = vfio_migration_state_notifier;
add_migration_state_change_notifier(&migration->migration_state); add_migration_state_change_notifier(&migration->migration_state);