1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 2adbed4e10f3..cab42cbd920d 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -62,8 +62,22 @@ config SERIAL_8250_CONSOLE
           kernel will automatically use the first serial line, /dev/ttyS0, as
           system console.
 
+          you can set that using a kernel command line option such as
+          "console=uart8250,io,0x3f8,9600n8"
+          "console=uart8250,mmio,0xff5e0000,115200n8".
+          and it will switch to normal serial console when correponding port is
+          ready.
+          "earlycon=uart8250,io,0x3f8,9600n8"
+          "earlycon=uart8250,mmio,0xff5e0000,115200n8".
+          it will not only setup early console.
+
           If unsure, say N.
 
+config FIX_EARLYCON_MEM
+        bool
+        depends on X86
+        default y
+
 config SERIAL_8250_GSC
         tristate
         depends on SERIAL_8250 && GSC