Save PC speaker state to remove differences between system
states after saving the snapshot and after loading it again.
This patch is needed for deterministic replay of the execution.
v2: Do not save the data that cannot affect the guest code behavior.
Signed-off-by: Pavel Dovgalyuk<pavel.dovga...@gmail.com>
---
hw/pcspk.c | 17 +++++++++++++++--
1 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/hw/pcspk.c b/hw/pcspk.c
index e430324..07a3de0 100644
--- a/hw/pcspk.c
+++ b/hw/pcspk.c
@@ -46,8 +46,8 @@ 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";
@@ -159,6 +159,18 @@ static const MemoryRegionOps pcspk_io_ops = {
},
};
+static const VMStateDescription vmstate_spk = {
+ .name = "pcspk",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(data_on, PCSpkState),
+ VMSTATE_UINT8(dummy_refresh_clock, PCSpkState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static int pcspk_initfn(ISADevice *dev)
{
PCSpkState *s = DO_UPCAST(PCSpkState, dev, dev);
@@ -185,6 +197,7 @@ static void pcspk_class_initfn(ObjectClass *klass, void
*data)
ic->init = pcspk_initfn;
dc->no_user = 1;
dc->props = pcspk_properties;
+ dc->vmsd = &vmstate_spk;
}
static TypeInfo pcspk_info = {
