Prevent starting different hypervisors that leverage hardware virtualization (VT-x/AMD-V). Fixes #548.

gns3server/modules/project_manager.py

@@ -103,19 +103,10 @@ class ProjectManager:
         :returns: boolean
         """
 
-        from .qemu import QemuVM
-        from .virtualbox import VirtualBoxVM
-        from .vmware import VMwareVM
         for project in self._projects.values():
             for vm in project.vms:
                 if vm == source_vm:
                     continue
-                if vm.hw_virtualization:
-                    if isinstance(source_vm, QemuVM) and not isinstance(vm, QemuVM):
-                        # A Qemu VM won't start if any other virtualization software uses hardware virtualization
-                        return False
-                    elif isinstance(source_vm, VirtualBoxVM) and not isinstance(vm, VirtualBoxVM) and not isinstance(vm, VMwareVM):
-                        # A VirtualBox VM won't start if KVM is being used
-                        return False
-                    # VMware doesn't seem to be bothered by any other virtualization software.
+                if vm.hw_virtualization and vm.__class__.__name__ != source_vm.__class__.__name__:
+                    return False
         return True

gns3server/modules/vmware/vmware_vm.py

@@ -344,6 +344,22 @@ class VMwareVM(BaseVM):
         if parse_version(self._ubridge_hypervisor.version) < parse_version('0.9.1'):
             raise VMwareError("uBridge version must be >= 0.9.1, detected version is {}".format(self._ubridge_hypervisor.version))
 
+    def check_hw_virtualization(self):
+        """
+        Returns either hardware virtualization is activated or not.
+
+        :returns: boolean
+        """
+
+        try:
+            self._vmx_pairs = self.manager.parse_vmware_file(self._vmx_path)
+        except OSError as e:
+            raise VMwareError('Could not read VMware VMX file "{}": {}'.format(self._vmx_path, e))
+
+        if self._get_vmx_setting("vhv.enable", "TRUE"):
+            return True
+        return False
+
     @asyncio.coroutine
     def start(self):
         """