Re: [PATCH] s390-bios: Skip writing iplb location to low core for ccw ipl

[Cornelia Huck]

On Fri, 30 Oct 2020 13:28:23 +0100
Christian Borntraeger <borntraeger@de.ibm.com> wrote:

> From: "Jason J. Herne" <jjherne@linux.ibm.com>
> 
> The architecture states that the iplb location is only written to low
> core for list directed ipl and not for traditional ccw ipl. If we don't
> skip this then operating systems that load by reading into low core
> memory may fail to start.
> 
> We should also not write the iplb pointer for network boot as it might
> overwrite content that we got via network.
> 
> Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
> Fixes: 9bfc04f9ef68 ("pc-bios: s390x: Save iplb location in lowcore")
> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> ---
>  pc-bios/s390-ccw/main.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Thanks, queued (together with a rebuild) to s390-fixes.