+void update_subcore_sibling_mask(void)
+{
+ int cpu;
+ /*
+ * sibling mask for the first cpu. Left shift this by required bits
+ * to get sibling mask for the rest of the cpus.
+ */
+ int sibling_mask_first_cpu = (1 << threads_per_subcore) - 1;
+
+ for_each_possible_cpu(cpu) {
+ int tid = cpu_thread_in_core(cpu);
+ int offset = (tid / threads_per_subcore) * threads_per_subcore;
+ int mask = sibling_mask_first_cpu << offset;
+
+ paca[cpu].subcore_sibling_mask = mask;
+
+ }
+}
+