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-rw-r--r--src/soc/intel/skylake/cpu.c11
-rw-r--r--src/soc/intel/skylake/include/soc/cpu.h1
2 files changed, 12 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c
index f92635da77..e9bb29f7a6 100644
--- a/src/soc/intel/skylake/cpu.c
+++ b/src/soc/intel/skylake/cpu.c
@@ -435,6 +435,17 @@ static int adjust_apic_id(int index, int apic_id)
return index;
}
+/* Check whether the current CPU is the sibling hyperthread. */
+int is_secondary_thread(void)
+{
+ int apic_id;
+ apic_id = lapicid();
+
+ if (!ht_disabled && (apic_id & 1))
+ return 1;
+ return 0;
+}
+
static void per_cpu_smm_trigger(void)
{
/* Relocate the SMM handler. */
diff --git a/src/soc/intel/skylake/include/soc/cpu.h b/src/soc/intel/skylake/include/soc/cpu.h
index 35a30819b2..33fb2f1b3a 100644
--- a/src/soc/intel/skylake/include/soc/cpu.h
+++ b/src/soc/intel/skylake/include/soc/cpu.h
@@ -67,5 +67,6 @@ int cpu_config_tdp_levels(void);
u32 cpu_family_model(void);
u32 cpu_stepping(void);
int cpu_is_ult(void);
+int is_secondary_thread(void);
#endif