Add vtpm methods to VM class

This adds get_vtpm(), create_vtpm(), and destroy_vtpm() methods to the
VM class.

vm.get_vtpm() returns the vtpm uuid associated to the vm if it exists,
None otherwise.

vm.create_vtpm() creates a vtpm and associates it to the vm. It returns
the newly created vtpm uuid, or fails if a vtpm is already associated to
the vm.

vm.destroy_vm() destroys the existing vtpm associated to the vm if one
exists. It doesn't fail if no vtpm is associated to the vm.

Signed-off-by: Thierry Escande <[email protected]>

lib/vm.py

@@ -401,6 +401,19 @@ def get_all_efi_bins(self):
 
         return binaries
 
+    def get_vtpm_uuid(self):
+        return self.host.xe('vtpm-list', {'vm': self.uuid}, minimal=True)
+
+    def create_vtpm(self):
+        logging.info("Creating vTPM for vm %s" % self.uuid)
+        return self.host.xe('vtpm-create', {'vm-uuid': self.uuid})
+
+    def destroy_vtpm(self):
+        vtpm_uuid = self.get_vtpm_uuid()
+        assert vtpm_uuid, "A vTPM must be present"
+        logging.info("Destroying vTPM %s" % vtpm_uuid)
+        return self.host.xe('vtpm-destroy', {'uuid': vtpm_uuid}, force=True)
+
     def clone(self):
         name = self.name() + '_clone_for_tests'
         logging.info("Clone VM")