[Qemu-devel] [PATCH 04/10] pcspk: adding vmstate for save/restore

[Paolo Bonzini <pbonzini@redhat.com>]

From: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>

VMState added by this patch preserves correct
loading of the PC speaker device state.

This breaks migration to 2.1 and earlier.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/audio/pcspk.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index 1d81bbe..62dfabe 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -50,8 +50,8 @@ typedef struct {
     unsigned int pit_count;
     unsigned int samples;
     unsigned int play_pos;
-    int data_on;
-    int dummy_refresh_clock;
+    uint8_t data_on;
+    uint8_t dummy_refresh_clock;
 } PCSpkState;
 
 static const char *s_spk = "pcspk";
@@ -163,6 +163,17 @@ static const MemoryRegionOps pcspk_io_ops = {
     },
 };
 
+static const VMStateDescription vmstate_spk = {
+    .name = "pcspk",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields      = (VMStateField[]) {
+        VMSTATE_UINT8(data_on, PCSpkState),
+        VMSTATE_UINT8(dummy_refresh_clock, PCSpkState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static void pcspk_initfn(Object *obj)
 {
     PCSpkState *s = PC_SPEAKER(obj);
@@ -192,6 +203,7 @@ static void pcspk_class_initfn(ObjectClass *klass, void *data)
 
     dc->realize = pcspk_realizefn;
     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
+    dc->vmsd = &vmstate_spk;
     dc->props = pcspk_properties;
     /* Reason: pointer property "pit", realize sets global pcspk_state */
     dc->cannot_instantiate_with_device_add_yet = true;
-- 
2.1.0