diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 6ca3cf936f..2168fc56c0 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -937,6 +937,11 @@ static void x86_machine_initfn(Object *obj)
     x86ms->acpi = ON_OFF_AUTO_AUTO;
     x86ms->max_ram_below_4g = 0; /* use default */
     x86ms->smp_dies = 1;
+
+    x86ms->apicid_from_cpu_idx = x86_apicid_from_cpu_idx;
+    x86ms->topo_ids_from_apicid = x86_topo_ids_from_apicid;
+    x86ms->apicid_from_topo_ids = x86_apicid_from_topo_ids;
+    x86ms->apicid_pkg_offset = apicid_pkg_offset;
 }
 
 static void x86_machine_class_init(ObjectClass *oc, void *data)
diff --git a/include/hw/i386/x86.h b/include/hw/i386/x86.h
index 54af8ab5cf..b522854816 100644
--- a/include/hw/i386/x86.h
+++ b/include/hw/i386/x86.h
@@ -66,6 +66,15 @@ typedef struct {
     OnOffAuto smm;
     OnOffAuto acpi;
 
+    /* Apic id specific handlers */
+    uint32_t (*apicid_from_cpu_idx)(X86CPUTopoInfo *topo_info,
+                                    unsigned cpu_index);
+    void (*topo_ids_from_apicid)(apic_id_t apicid, X86CPUTopoInfo *topo_info,
+                                 X86CPUTopoIDs *topo_ids);
+    apic_id_t (*apicid_from_topo_ids)(X86CPUTopoInfo *topo_info,
+                                      const X86CPUTopoIDs *topo_ids);
+    uint32_t (*apicid_pkg_offset)(X86CPUTopoInfo *topo_info);
+
     /*
      * Address space used by IOAPIC device. All IOAPIC interrupts
      * will be translated to MSI messages in the address space.