[Qemu-devel] [PATCH] vmstate: Add unmigratable flag

[Jan Kiszka <jan.kiszka@siemens.com>]

A first step towards getting rid of register_device_unmigratable
(ivshmem and lacking vmstate support in virtio are blocking this):

Allow to register an unmigratable vmstate via qdev, i.e. tag a device
declaratively.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 hw/hw.h  |    1 +
 savevm.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/hw/hw.h b/hw/hw.h
index 56447a7..97c474e 100644
--- a/hw/hw.h
+++ b/hw/hw.h
@@ -333,6 +333,7 @@ struct VMStateDescription {
     void (*pre_save)(void *opaque);
     VMStateField *fields;
     const VMStateSubsection *subsections;
+    bool unmigratable;
 };
 
 extern const VMStateInfo vmstate_info_bool;
diff --git a/savevm.c b/savevm.c
index 939845c..98b2422 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1234,6 +1234,7 @@ int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
     se->opaque = opaque;
     se->vmsd = vmsd;
     se->alias_id = alias_id;
+    se->no_migrate = vmsd->unmigratable;
 
     if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
         char *id = dev->parent_bus->info->get_dev_path(dev);
-- 
1.7.1