| Message ID | febc920964f2f0919d21775132e84c5cc270177e.1697708489.git.geert+renesas@glider.be (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | sh: Revive BIOS earlyprintk support | expand |
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>
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.
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(+)