Don't allow attached PCI devices and virt_mode = 'pvh'

qubes/ext/pci.py

@@ -225,6 +225,10 @@ class PCIDeviceExtension(qubes.ext.Extension):
             raise qubes.exc.QubesException(
                 'Invalid PCI device: {}'.format(device.ident))
 
+        if vm.virt_mode == 'pvh':
+            raise qubes.exc.QubesException(
+                "Can't attach PCI device to VM in pvh mode")
+
         if not vm.is_running():
             return
 

qubes/vm/qubesvm.py

@@ -96,6 +96,9 @@ def _setter_virt_mode(self, prop, value):
     if value not in ('hvm', 'pv', 'pvh'):
         raise qubes.exc.QubesPropertyValueError(self, prop, value,
             'Invalid virtualization mode, supported values: hvm, pv, pvh')
+    if value == 'pvh' and list(self.devices['pci'].persistent()):
+        raise qubes.exc.QubesPropertyValueError(self, prop, value,
+            "pvh mode can't be set if pci devices are attached")
     return value