diff --git a/kernel/cpu.c b/kernel/cpu.c
index 89a8e7b9fdac26f4424bc8e5d3b5af8c0f8b1fbd..fdd911b306e0558350a179a848fe5b0525771964 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -432,6 +432,14 @@ static inline bool cpu_smt_allowed(unsigned int cpu)
 	if (cpu_smt_control == CPU_SMT_ENABLED)
 		return true;
 
+	/* All CPUs are bootable if controls are not configured */
+	if (cpu_smt_control == CPU_SMT_NOT_IMPLEMENTED)
+		return true;
+
+	/* All CPUs are bootable if CPU is not SMT capable */
+	if (cpu_smt_control == CPU_SMT_NOT_SUPPORTED)
+		return true;
+
 	if (topology_is_primary_thread(cpu))
 		return true;