1 files changed, 9 insertions, 3 deletions

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index e9bbe02950ad..36171bcd91f8 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -423,9 +423,15 @@ static bool match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
                 int cpu1 = c->cpu_index, cpu2 = o->cpu_index;
 
                 if (c->phys_proc_id == o->phys_proc_id &&
-                    per_cpu(cpu_llc_id, cpu1) == per_cpu(cpu_llc_id, cpu2) &&
-                    c->cpu_core_id == o->cpu_core_id)
-                        return topology_sane(c, o, "smt");
+                    per_cpu(cpu_llc_id, cpu1) == per_cpu(cpu_llc_id, cpu2)) {
+                        if (c->cpu_core_id == o->cpu_core_id)
+                                return topology_sane(c, o, "smt");
+
+                        if ((c->cu_id != 0xff) &&
+                            (o->cu_id != 0xff) &&
+                            (c->cu_id == o->cu_id))
+                                return topology_sane(c, o, "smt");
+                }
 
         } else if (c->phys_proc_id == o->phys_proc_id &&
                    c->cpu_core_id == o->cpu_core_id) {