perf-kvm,  virt-win-reg,  pci-passthrough

virt-win-reg: 'verify_reg_cmd' uses right registry entry now.
pci-passthrough: missing default value for params.get("libvirt_pci_server_ip").
per-kvm: branch conditions in "if top:" and "if report:".
```
diff --git a/libvirt/tests/src/libvirt_pci_passthrough.py b/libvirt/tests/src/libvirt_pci_passthrough.py
index cedabec..449feb5 100644
--- a/libvirt/tests/src/libvirt_pci_passthrough.py
+++ b/libvirt/tests/src/libvirt_pci_passthrough.py
@@ -45,10 +45,11 @@ def run(test, params, env):
     server_ip = params.get("libvirt_pci_server_ip")
 
     # Check the parameters from configuration file.
-    if (pci_dev.count("ENTER") or net_ip.count("ENTER")
-            or server_ip.count("ENTER")):
-        raise error.TestNAError("Please edit the configuration file to set "
-                                "proper parameters for this test.")
+    if (pci_dev.count("ENTER"))
+        raise error.TestNAError("Please input the device label.")
+
+    if ((device_type == "NIC") and (net_ip.count("ENTER") or server_ip.count("ENTER"))):
+        raise error.TestNAError("Please input the param for net_ip and server_ip.")
 
     fdisk_list_before = None
 ```

Maybe this can achieve want you want.