Introducing new topology service to query NUMA information from within a component.

repos/base/include/topo_session/topo_session.h

@@ -0,0 +1,52 @@
+/*
+ * \brief   Topology session interface
+ * \author  Michael Müller
+ * \date    2022-10-06
+ * 
+ * A topology session stores the component's view on the hardware topology, i.e. it's location within the NUMA topology.
+ */
+
+/*
+ * Copyright (C) 2022 Michael Müller
+ *
+ * This file is part of EalánOS which is based on the Genode OS framework
+ * released under the terms of the GNU Affero General Public License version 3.
+ */
+
+#pragma once
+
+#include <session/session.h>
+#include <base/affinity.h>
+
+namespace Genode {
+
+    struct Topo_session;
+    struct Topo_session_client;
+    struct Node;
+}
+
+struct Genode::Topo_session : Session 
+{
+    /**
+     * \nooapi
+     * 
+     */
+    static const char *service_name() { return "TOPO"; }
+
+    enum
+    {
+        CAP_QUOTA = 2
+    };
+
+    typedef Topo_session_client Client;
+
+    virtual ~Topo_session() { }
+
+    virtual Node *node_affinity_of(Affinity::Location &) = 0;
+    virtual unsigned node_count() = 0;
+
+    GENODE_RPC(Rpc_node_affinity, Node*, node_affinity_of, Affinity::Location &);
+    GENODE_RPC(Rpc_node_count, unsigned, node_count);
+
+    GENODE_RPC_INTERFACE(Rpc_node_affinity, Rpc_node_count);
+};