From: Geert Uytterhoeven Date: Thu, 19 Oct 2023 09:46:44 +0000 (+0200) Subject: Documentation: kernel-parameters: Add earlyprintk=bios on SH X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=78a96c86a0ff2be546f2ecca210fde5dca30fb59;p=linux.git Documentation: kernel-parameters: Add earlyprintk=bios on SH Document the use of the "earlyprintk=bios[,keep]" kernel parameter option on SuperH systems with a SuperH standard BIOS. Signed-off-by: Geert Uytterhoeven Reviewed-by: John Paul Adrian Glaubitz Link: https://lore.kernel.org/r/febc920964f2f0919d21775132e84c5cc270177e.1697708489.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz --- diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 0a1731a0f0ef3..2b03034207c0f 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1331,6 +1331,7 @@ earlyprintk=dbgp[debugController#] earlyprintk=pciserial[,force],bus:device.function[,baudrate] earlyprintk=xdbc[xhciController#] + earlyprintk=bios earlyprintk is useful when the kernel crashes before the normal console is initialized. It is not enabled by @@ -1361,6 +1362,8 @@ The sclp output can only be used on s390. + The bios output can only be used on SuperH. + The optional "force" to "pciserial" enables use of a PCI device even when its classcode is not of the UART class.