vm_session: extensions

- support to create multiple vCPUs
- support to implement Vm_session methods client side within base library
- adjust muen specific virtualbox4 version to compile/link

Issue #3111

repos/base/include/vm_session/handler.h

@@ -0,0 +1,103 @@
+/*
+ * \brief  Client-side VM session exception handler
+ * \author Alexander Boettcher
+ * \date   2018-09-29
+ */
+
+/*
+ * Copyright (C) 2018 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#ifndef _INCLUDE__VM_SESSION__HANDLER_H_
+#define _INCLUDE__VM_SESSION__HANDLER_H_
+
+#include <base/signal.h>
+
+namespace Genode {
+	class Vm_state;
+	class Vm_handler_base;
+	template <typename, typename> class Vm_handler;
+}
+
+class Genode::Vm_handler_base : public Signal_dispatcher_base
+{
+	friend class Vm_session_client;
+
+	protected:
+
+		Rpc_entrypoint            &_rpc_ep;
+		Signal_context_capability  _cap {};
+		Genode::Semaphore          _done { 0 };
+
+	public:
+
+		virtual bool config_vm_event(Genode::Vm_state &, unsigned) = 0;
+
+		Vm_handler_base(Rpc_entrypoint &rpc)
+		: _rpc_ep(rpc) { }
+};
+
+template <typename T, typename EP = Genode::Entrypoint>
+class Genode::Vm_handler : public Vm_handler_base 
+{
+	private:
+
+		EP &_ep;
+		T  &_obj;
+		void (T::*_member) ();
+		void (T::*_config) (Genode::Vm_state &, unsigned const);
+
+		/*
+		 * Noncopyable
+		 */
+		Vm_handler(Vm_handler const &);
+		Vm_handler &operator = (Vm_handler const &);
+
+	public:
+
+		/**
+		 * Constructor
+		 *
+		 * \param obj,member  object and method to call when
+		 *                    the vm exception occurs
+		 */
+		Vm_handler(EP &ep, T &obj, void (T::*member)(),
+		           void (T::*config)(Genode::Vm_state&, unsigned) = nullptr)
+		:
+			Vm_handler_base(ep.rpc_ep()),
+			_ep(ep),
+			_obj(obj),
+			_member(member),
+			_config(config)
+		{
+			_cap = ep.manage(*this);
+		}
+
+		~Vm_handler() { _ep.dissolve(*this); }
+
+		/**
+		 * Interface of Signal_dispatcher_base
+		 */
+		void dispatch(unsigned) override
+		{
+			(_obj.*_member)();
+			_done.up();
+		}
+
+		bool config_vm_event(Genode::Vm_state &state,
+		                     unsigned const vm_event) override
+		{
+			if (!_config)
+				return false;
+
+			(_obj.*_config)(state, vm_event);
+			return true;
+		}
+
+		operator Capability<Signal_context>() const { return _cap; }
+};
+
+#endif /* _INCLUDE__VM_SESSION__HANDLER_H_ */