Documentation: Add "earlycon=sbi" to the admin guide

This argument is supported on RISC-V systems and widely used, but was
not documented here.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 46b826fcb5ad55fed0d8ca92ab10751baabf64a9..ce3696d8256c25ed930f7429833c7c3812acc897 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1044,6 +1044,10 @@
                        specified address. The serial port must already be
                        setup and configured. Options are not yet supported.
 
+               sbi
+                       Use RISC-V SBI (Supervisor Binary Interface) for early
+                       console.
+
                smh     Use ARM semihosting calls for early console.
 
                s3c2410,<addr>