Index: sys/arm64/arm64/mp_machdep.c
===================================================================
--- sys/arm64/arm64/mp_machdep.c
+++ sys/arm64/arm64/mp_machdep.c
@@ -437,8 +437,27 @@
 struct cpu_group *
 cpu_topo(void)
 {
-
-	return (smp_topo_none());
+	cpuset_t dom;
+	int cpuspdom, i, j;
+
+	if (vm_ndomains == 1)
+		return (smp_topo_none());
+	if (mp_ncpus % vm_ndomains != 0) {
+		printf("%s: unbalanced NUMA domains detected\n", __func__);
+		return (smp_topo_none());
+	}
+	cpuspdom = mp_ncpus / vm_ndomains;
+	for (i = 0; i < vm_ndomains; i++) {
+		CPU_ZERO(&dom);
+		for (j = 0; j < cpuspdom; j++)
+			CPU_SET(i * cpuspdom + j, &dom);
+		if (CPU_CMP(&dom, &cpuset_domain[i]) != 0) {
+			printf("%s: non-contiguous NUMA domains detected\n",
+			    __func__);
+			return (smp_topo_none());
+		}
+	}
+	return (smp_topo_1level(CG_SHARE_L3, cpuspdom, 0));
 }
 
 /* Determine if we running MP machine */