diff --git a/repos/base/include/topo_session/client.h b/repos/base/include/topo_session/client.h
index a092597310..a7ec0a0bb9 100644
--- a/repos/base/include/topo_session/client.h
+++ b/repos/base/include/topo_session/client.h
@@ -46,4 +46,14 @@ struct Genode::Topo_session_client : Rpc_client<Topo_session>
     {
         call<Rpc_reconstruct>(affinity);
     }
+
+    unsigned phys_id(const Affinity::Location &loc) override
+    {
+        return call<Rpc_phys_id>(loc);
+    }
+
+    Affinity::Space const global_affinity_space() override
+    {
+        return call<Rpc_total_core_count>();
+    }
 };
\ No newline at end of file
diff --git a/repos/base/include/topo_session/topo_session.h b/repos/base/include/topo_session/topo_session.h
index 8030df45c1..1d3b0c8d0e 100644
--- a/repos/base/include/topo_session/topo_session.h
+++ b/repos/base/include/topo_session/topo_session.h
@@ -50,11 +50,15 @@ struct Genode::Topo_session : Session
     virtual Topology::Numa_region node_at_id(unsigned node_id) = 0;
     virtual unsigned node_count() = 0;
     virtual void reconstruct(const Affinity) = 0;
+    virtual unsigned phys_id(Affinity::Location const &) = 0;
+    virtual Affinity::Space const global_affinity_space() = 0;
 
     GENODE_RPC(Rpc_node_affinity, Topology::Numa_region, node_affinity_of, Affinity::Location const &);
     GENODE_RPC(Rpc_node_id, Topology::Numa_region, node_at_id, unsigned);
     GENODE_RPC(Rpc_node_count, unsigned, node_count);
     GENODE_RPC(Rpc_reconstruct, void, reconstruct, Affinity);
+    GENODE_RPC(Rpc_phys_id, unsigned, phys_id, Affinity::Location const &);
+    GENODE_RPC(Rpc_total_core_count, Affinity::Space const, global_affinity_space);
 
-    GENODE_RPC_INTERFACE(Rpc_node_affinity, Rpc_node_id, Rpc_node_count, Rpc_reconstruct);
+    GENODE_RPC_INTERFACE(Rpc_node_affinity, Rpc_node_id, Rpc_node_count, Rpc_reconstruct, Rpc_phys_id, Rpc_total_core_count);
 };
\ No newline at end of file
diff --git a/repos/base/src/core/include/topo_session_component.h b/repos/base/src/core/include/topo_session_component.h
index 20699f7193..2632bbdedc 100644
--- a/repos/base/src/core/include/topo_session_component.h
+++ b/repos/base/src/core/include/topo_session_component.h
@@ -73,4 +73,14 @@ class Genode::Topo_session_component : public Session_object<Topo_session>
             _affinity = affinity;
             construct();
         }
+
+        unsigned phys_id(const Affinity::Location &loc) override
+        {
+            return platform_specific().kernel_cpu_id(loc);
+        }
+
+        Affinity::Space const global_affinity_space() override
+        {
+            return platform_specific().affinity_space();
+        }
 };