ehci: add live migration support

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

hw/usb/hcd-ehci.c

@@ -414,16 +414,17 @@ struct EHCIState {
      */
     QEMUTimer *frame_timer;
     QEMUBH *async_bh;
-    int astate;                        // Current state in asynchronous schedule
-    int pstate;                        // Current state in periodic schedule
+    uint32_t astate;         /* Current state in asynchronous schedule */
+    uint32_t pstate;         /* Current state in periodic schedule     */
     USBPort ports[NB_PORTS];
     USBPort *companion_ports[NB_PORTS];
     uint32_t usbsts_pending;
     EHCIQueueHead aqueues;
     EHCIQueueHead pqueues;
 
-    uint32_t a_fetch_addr;   // which address to look at next
-    uint32_t p_fetch_addr;   // which address to look at next
+    /* which address to look at next */
+    uint32_t a_fetch_addr;
+    uint32_t p_fetch_addr;
 
     USBPacket ipacket;
     QEMUSGList isgl;
@@ -2390,9 +2391,58 @@ static USBBusOps ehci_bus_ops = {
     .register_companion = ehci_register_companion,
 };
 
+static int usb_ehci_post_load(void *opaque, int version_id)
+{
+    EHCIState *s = opaque;
+    int i;
+
+    for (i = 0; i < NB_PORTS; i++) {
+        USBPort *companion = s->companion_ports[i];
+        if (companion == NULL) {
+            continue;
+        }
+        if (s->portsc[i] & PORTSC_POWNER) {
+            companion->dev = s->ports[i].dev;
+        } else {
+            companion->dev = NULL;
+        }
+    }
+
+    return 0;
+}
+
 static const VMStateDescription vmstate_ehci = {
-    .name = "ehci",
-    .unmigratable = 1,
+    .name        = "ehci",
+    .version_id  = 1,
+    .post_load   = usb_ehci_post_load,
+    .fields      = (VMStateField[]) {
+        VMSTATE_PCI_DEVICE(dev, EHCIState),
+        /* mmio registers */
+        VMSTATE_UINT32(usbcmd, EHCIState),
+        VMSTATE_UINT32(usbsts, EHCIState),
+        VMSTATE_UINT32(usbintr, EHCIState),
+        VMSTATE_UINT32(frindex, EHCIState),
+        VMSTATE_UINT32(ctrldssegment, EHCIState),
+        VMSTATE_UINT32(periodiclistbase, EHCIState),
+        VMSTATE_UINT32(asynclistaddr, EHCIState),
+        VMSTATE_UINT32(configflag, EHCIState),
+        VMSTATE_UINT32(portsc[0], EHCIState),
+        VMSTATE_UINT32(portsc[1], EHCIState),
+        VMSTATE_UINT32(portsc[2], EHCIState),
+        VMSTATE_UINT32(portsc[3], EHCIState),
+        VMSTATE_UINT32(portsc[4], EHCIState),
+        VMSTATE_UINT32(portsc[5], EHCIState),
+        /* frame timer */
+        VMSTATE_TIMER(frame_timer, EHCIState),
+        VMSTATE_UINT64(last_run_ns, EHCIState),
+        VMSTATE_UINT32(async_stepdown, EHCIState),
+        /* schedule state */
+        VMSTATE_UINT32(astate, EHCIState),
+        VMSTATE_UINT32(pstate, EHCIState),
+        VMSTATE_UINT32(a_fetch_addr, EHCIState),
+        VMSTATE_UINT32(p_fetch_addr, EHCIState),
+        VMSTATE_END_OF_LIST()
+    }
 };
 
 static Property ehci_properties[] = {