[2/2] Documentation: kernel-parameters: Add earlyprintk=bios on SH
Commit Message
Document the use of the "earlyprintk=bios[,keep]" kernel parameter
option on SuperH systems with a SuperH standard BIOS.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
Documentation/admin-guide/kernel-parameters.txt | 3 +++
1 file changed, 3 insertions(+)
Comments
On Thu, 2023-10-19 at 11:46 +0200, Geert Uytterhoeven wrote:
> Document the use of the "earlyprintk=bios[,keep]" kernel parameter
> option on SuperH systems with a SuperH standard BIOS.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 657bb0b54e2fc6cf..8e7f6be051a0e1d3 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.
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
@@ -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.