hw/timer/etraxfs_timer: Add vmstate for ETRAX timers

Add the vmstate for the ETRAX timers.
This is in theory a migration compatibility break
for the 'AXIS devboard 88' CRIS machine.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211106105623.510868-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

hw/timer/etraxfs_timer.c

@@ -26,6 +26,7 @@
 #include "hw/sysbus.h"
 #include "sysemu/reset.h"
 #include "sysemu/runstate.h"
+#include "migration/vmstate.h"
 #include "qemu/module.h"
 #include "qemu/timer.h"
 #include "hw/irq.h"
@@ -64,7 +65,7 @@ struct ETRAXTimerState {
     ptimer_state *ptimer_t1;
     ptimer_state *ptimer_wd;
 
-    int wd_hits;
+    uint32_t wd_hits;
 
     /* Control registers.  */
     uint32_t rw_tmr0_div;
@@ -83,6 +84,36 @@ struct ETRAXTimerState {
     uint32_t r_masked_intr;
 };
 
+static const VMStateDescription vmstate_etraxfs = {
+    .name = "etraxfs",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (VMStateField[]) {
+        VMSTATE_PTIMER(ptimer_t0, ETRAXTimerState),
+        VMSTATE_PTIMER(ptimer_t1, ETRAXTimerState),
+        VMSTATE_PTIMER(ptimer_wd, ETRAXTimerState),
+
+        VMSTATE_UINT32(wd_hits, ETRAXTimerState),
+
+        VMSTATE_UINT32(rw_tmr0_div, ETRAXTimerState),
+        VMSTATE_UINT32(r_tmr0_data, ETRAXTimerState),
+        VMSTATE_UINT32(rw_tmr0_ctrl, ETRAXTimerState),
+
+        VMSTATE_UINT32(rw_tmr1_div, ETRAXTimerState),
+        VMSTATE_UINT32(r_tmr1_data, ETRAXTimerState),
+        VMSTATE_UINT32(rw_tmr1_ctrl, ETRAXTimerState),
+
+        VMSTATE_UINT32(rw_wd_ctrl, ETRAXTimerState),
+
+        VMSTATE_UINT32(rw_intr_mask, ETRAXTimerState),
+        VMSTATE_UINT32(rw_ack_intr, ETRAXTimerState),
+        VMSTATE_UINT32(r_intr, ETRAXTimerState),
+        VMSTATE_UINT32(r_masked_intr, ETRAXTimerState),
+
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static uint64_t
 timer_read(void *opaque, hwaddr addr, unsigned int size)
 {
@@ -357,6 +388,7 @@ static void etraxfs_timer_class_init(ObjectClass *klass, void *data)
     ResettableClass *rc = RESETTABLE_CLASS(klass);
 
     dc->realize = etraxfs_timer_realize;
+    dc->vmsd = &vmstate_etraxfs;
     rc->phases.enter = etraxfs_timer_reset_enter;
     rc->phases.hold = etraxfs_timer_reset_hold;
 }