Add qemuDomainCCWAddrSetCreateFromDomain

The address sets (pci, ccw, virtio serial) are currently cached
in qemu private data, but all the information required to recreate
these sets is in the domain definition. Therefore I am removing
the redundant data and adding a way to recalculate these sets.

Add a function that calculates the ccw address set
from the domain definition.

src/qemu/qemu_domain_address.c

@@ -320,6 +320,28 @@ qemuDomainPrimeVirtioDeviceAddresses(virDomainDefPtr def,
     }
 }
 
+virDomainCCWAddressSetPtr
+qemuDomainCCWAddrSetCreateFromDomain(virDomainDefPtr def)
+{
+    virDomainCCWAddressSetPtr addrs = NULL;
+
+    if (!(addrs = virDomainCCWAddressSetCreate()))
+        goto error;
+
+    if (virDomainDeviceInfoIterate(def, virDomainCCWAddressValidate,
+                                   addrs) < 0)
+        goto error;
+
+    if (virDomainDeviceInfoIterate(def, virDomainCCWAddressAllocate,
+                                   addrs) < 0)
+        goto error;
+
+    return addrs;
+
+ error:
+    virDomainCCWAddressSetFree(addrs);
+    return NULL;
+}
 
 /*
  * Three steps populating CCW devnos
@@ -341,16 +363,9 @@ qemuDomainAssignS390Addresses(virDomainDefPtr def,
         qemuDomainPrimeVirtioDeviceAddresses(
             def, VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW);
 
-        if (!(addrs = virDomainCCWAddressSetCreate()))
+        if (!(addrs = qemuDomainCCWAddrSetCreateFromDomain(def)))
             goto cleanup;
 
-        if (virDomainDeviceInfoIterate(def, virDomainCCWAddressValidate,
-                                       addrs) < 0)
-            goto cleanup;
-
-        if (virDomainDeviceInfoIterate(def, virDomainCCWAddressAllocate,
-                                       addrs) < 0)
-            goto cleanup;
     } else if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_S390)) {
         /* deal with legacy virtio-s390 */
         qemuDomainPrimeVirtioDeviceAddresses(

src/qemu/qemu_domain_address.h

@@ -41,6 +41,10 @@ void qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
                                     virDomainDeviceInfoPtr info,
                                     const char *devstr);
 
+virDomainCCWAddressSetPtr
+qemuDomainCCWAddrSetCreateFromDomain(virDomainDefPtr def)
+    ATTRIBUTE_NONNULL(1);
+
 # define __QEMU_DOMAIN_ADDRESS_H__
 
 #endif /* __QEMU_DOMAIN_ADDRESS_H__ */