diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 9b9be4ea0f..1e685f982f 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -2152,12 +2152,25 @@ void build_pptt(GArray *table_data, BIOSLinker *linker, MachineState *ms,
     int64_t socket_id = -1, cluster_id = -1, core_id = -1;
     uint32_t socket_offset = 0, cluster_offset = 0, core_offset = 0;
     uint32_t pptt_start = table_data->len;
+    uint32_t root_offset;
     int n;
     AcpiTable table = { .sig = "PPTT", .rev = 2,
                         .oem_id = oem_id, .oem_table_id = oem_table_id };
 
     acpi_table_begin(&table, table_data);
 
+    /*
+     * Build a root node for all the processor nodes. Otherwise when
+     * building a multi-socket system each socket tree is separated
+     * and will be hard for the OS like Linux to know whether the
+     * system is homogeneous.
+     */
+    root_offset = table_data->len - pptt_start;
+    build_processor_hierarchy_node(table_data,
+        (1 << 0) | /* Physical package */
+        (1 << 4), /* Identical Implementation */
+        0, 0, NULL, 0);
+
     /*
      * This works with the assumption that cpus[n].props.*_id has been
      * sorted from top to down levels in mc->possible_cpu_arch_ids().
@@ -2174,7 +2187,7 @@ void build_pptt(GArray *table_data, BIOSLinker *linker, MachineState *ms,
             build_processor_hierarchy_node(table_data,
                 (1 << 0) | /* Physical package */
                 (1 << 4), /* Identical Implementation */
-                0, socket_id, NULL, 0);
+                root_offset, socket_id, NULL, 0);
         }
 
         if (mc->smp_props.clusters_supported && mc->smp_props.has_clusters) {