diff options
| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2020-03-30 17:47:12 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-02 14:55:45 -0400 |
| commit | f602d047ac21fc10bc325bf12fe61f4f5c4360d4 (patch) | |
| tree | fcc079b22965a92897a31ac25e7765af0267d8f4 /hw/char/serial.c | |
| parent | ddd31732a7379e056749836ff37ff57718083ddb (diff) | |
serial: Fix double migration data
After c9808d60281 we have both an object representing the serial-isa
device and a separate object representing the underlying common serial
uart. Both of these have vmsd's associated with them and thus the
migration stream ends up with two copies of the migration data - the
serial-isa includes the vmstate of the core serial. Besides
being wrong, it breaks backwards migration compatibility.
Fix this by removing the dc->vmsd from the core device, so it only
gets migrated by any parent devices including it.
Add a vmstate_serial_mm so that any device that uses serial_mm_init
rather than creating a device still gets migrated.
(That doesn't fix backwards migration for serial_mm_init users,
but does seem to work forwards for ppce500).
Fixes: c9808d60281 ('serial: realize the serial device')
Buglink: https://bugs.launchpad.net/qemu/+bug/1869426
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20200330164712.198282-1-dgilbert@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/char/serial.c')
| -rw-r--r-- | hw/char/serial.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/hw/char/serial.c b/hw/char/serial.c index 2ab8b69e03..c822a9ae6c 100644 --- a/hw/char/serial.c +++ b/hw/char/serial.c @@ -1043,7 +1043,6 @@ static void serial_class_init(ObjectClass *klass, void* data) dc->user_creatable = false; dc->realize = serial_realize; dc->unrealize = serial_unrealize; - dc->vmsd = &vmstate_serial; device_class_set_props(dc, serial_properties); } @@ -1113,6 +1112,16 @@ static void serial_mm_realize(DeviceState *dev, Error **errp) sysbus_init_irq(SYS_BUS_DEVICE(smm), &smm->serial.irq); } +static const VMStateDescription vmstate_serial_mm = { + .name = "serial", + .version_id = 3, + .minimum_version_id = 2, + .fields = (VMStateField[]) { + VMSTATE_STRUCT(serial, SerialMM, 0, vmstate_serial, SerialState), + VMSTATE_END_OF_LIST() + } +}; + SerialMM *serial_mm_init(MemoryRegion *address_space, hwaddr base, int regshift, qemu_irq irq, int baudbase, @@ -1162,6 +1171,7 @@ static void serial_mm_class_init(ObjectClass *oc, void *data) device_class_set_props(dc, serial_mm_properties); dc->realize = serial_mm_realize; + dc->vmsd = &vmstate_serial_mm; } static const TypeInfo serial_mm_info = { |