diff --git a/src/ec/google/wilco/commands.c b/src/ec/google/wilco/commands.c
index 626f9dd..791141e 100644
--- a/src/ec/google/wilco/commands.c
+++ b/src/ec/google/wilco/commands.c
@@ -224,3 +224,29 @@
 	wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, KB_ERR_CODE,
 			 &err_code, 1, NULL, 0);
 }
+
+/*
+ * EC CPU ID data struct
+ * MBOX[2] = 0xFF
+ * MBOX[3] = CPUID_Low
+ * MBOX[4] = CPUID_Mid
+ * MBOX[5] = CPUID_High
+ * MBOX[6] = CPU_Core
+ * MBOX[7] = GPU_Core
+ * MBOX[8] = Reserved
+ */
+int wilco_ec_set_cpuid(uint32_t cpuid, uint8_t cpu_cores, uint8_t gpu_cores)
+{
+	uint8_t cpu_id[7] = {0}, i;
+
+	cpu_id[0] = 0xff;
+	for (i = 1; i < 4; i++) {
+		cpu_id[i] = cpuid & 0xff;
+		cpuid = cpuid >> 8;
+	}
+	cpu_id[4] = cpu_cores;
+	cpu_id[5] = gpu_cores;
+
+	return wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, KB_CPU_ID, cpu_id,
+				ARRAY_SIZE(cpu_id), NULL, 0);
+}