arm64: cpuinfo: add system serial support

Change-Id: I4542f07226e47e67be1f2792cffaa71fd6401442 Signed-off-by: Huang, Tao <[email protected]> platform 85be89e
scpcom · May 27, 2020 · f4b398d · f4b398d
1 parent 815ccbf
commit f4b398d
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
@@ -25,6 +25,12 @@
 #include <linux/smp.h>
 #include <linux/delay.h>
 
+unsigned int system_serial_low;
+EXPORT_SYMBOL(system_serial_low);
+
+unsigned int system_serial_high;
+EXPORT_SYMBOL(system_serial_high);
+
 /*
  * In case the boot CPU is hotpluggable, we record its initial state and
  * current state separately. Certain system registers may contain different
@@ -179,6 +185,9 @@ static int c_show(struct seq_file *m, void *v)
 		seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr));
 	}
 
+	seq_printf(m, "Serial\t\t: %08x%08x\n",
+		   system_serial_high, system_serial_low);
+
 	return 0;
 }