2023-10-19 09:47:12

by Geert Uytterhoeven

Subject: [PATCH 2/2] 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 <[email protected]>
---
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.
--
2.34.1

2023-10-24 16:43:30

by John Paul Adrian Glaubitz

Subject: Re: [PATCH 2/2] Documentation: kernel-parameters: Add earlyprintk=bios on SH

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 <[email protected]>
> ---
> 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 <[email protected]>

--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
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