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.
 
                        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>
                smh     Use ARM semihosting calls for early console.
 
                s3c2410,<addr>