1 files changed, 42 insertions, 0 deletions

diff --git a/hw/core/machine.c b/hw/core/machine.c
index 1000406211..46f8f9a2b0 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -1262,6 +1262,45 @@ static void machine_numa_finish_cpu_init(MachineState *machine)
     g_string_free(s, true);
 }
 
+static void validate_cpu_cluster_to_numa_boundary(MachineState *ms)
+{
+    MachineClass *mc = MACHINE_GET_CLASS(ms);
+    NumaState *state = ms->numa_state;
+    const CPUArchIdList *possible_cpus = mc->possible_cpu_arch_ids(ms);
+    const CPUArchId *cpus = possible_cpus->cpus;
+    int i, j;
+
+    if (state->num_nodes <= 1 || possible_cpus->len <= 1) {
+        return;
+    }
+
+    /*
+     * The Linux scheduling domain can't be parsed when the multiple CPUs
+     * in one cluster have been associated with different NUMA nodes. However,
+     * it's fine to associate one NUMA node with CPUs in different clusters.
+     */
+    for (i = 0; i < possible_cpus->len; i++) {
+        for (j = i + 1; j < possible_cpus->len; j++) {
+            if (cpus[i].props.has_socket_id &&
+                cpus[i].props.has_cluster_id &&
+                cpus[i].props.has_node_id &&
+                cpus[j].props.has_socket_id &&
+                cpus[j].props.has_cluster_id &&
+                cpus[j].props.has_node_id &&
+                cpus[i].props.socket_id == cpus[j].props.socket_id &&
+                cpus[i].props.cluster_id == cpus[j].props.cluster_id &&
+                cpus[i].props.node_id != cpus[j].props.node_id) {
+                warn_report("CPU-%d and CPU-%d in socket-%" PRId64 "-cluster-%" PRId64
+                             " have been associated with node-%" PRId64 " and node-%" PRId64
+                             " respectively. It can cause OSes like Linux to"
+                             " misbehave", i, j, cpus[i].props.socket_id,
+                             cpus[i].props.cluster_id, cpus[i].props.node_id,
+                             cpus[j].props.node_id);
+            }
+        }
+    }
+}
+
 MemoryRegion *machine_consume_memdev(MachineState *machine,
                                      HostMemoryBackend *backend)
 {
@@ -1355,6 +1394,9 @@ void machine_run_board_init(MachineState *machine, const char *mem_path, Error *
         numa_complete_configuration(machine);
         if (machine->numa_state->num_nodes) {
             machine_numa_finish_cpu_init(machine);
+            if (machine_class->cpu_cluster_has_numa_boundary) {
+                validate_cpu_cluster_to_numa_boundary(machine);
+            }
         }
     }