Re: [Qemu-devel] [qemu-s390x] [PATCH v8 12/13] s390-ccw: use zipl values when no boot menu options are present

[Thomas Huth <thuth@redhat.com>]

On 21.02.2018 20:35, Collin L. Walling wrote:
> If no boot menu options are present, then flag the boot menu to
> use the zipl options that were set in the zipl configuration file
> (and stored on disk by zipl). These options are found at some
> offset prior to the start of the zipl boot menu banner. The zipl
> timeout value is limited to a 16-bit unsigned integer and stored
> as seconds, so we take care to convert it to milliseconds in order
> to conform to the rest of the boot menu functionality. This is
> limited to CCW devices.
> 
> For reference, the zipl configuration file uses the following
> fields in the menu section:
> 
>       prompt=1      enable the boot menu
>       timeout=X     set the timeout to X seconds
> 
> To explicitly disregard any boot menu options, then menu=off or
> <bootmenu enable='no' ... /> must be specified.
> 
> Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
> ---
>  hw/s390x/ipl.c          |  5 +++++
>  hw/s390x/ipl.h          |  1 +
>  pc-bios/s390-ccw/iplb.h |  1 +
>  pc-bios/s390-ccw/main.c |  3 ++-
>  pc-bios/s390-ccw/menu.c | 14 ++++++++++++++
>  5 files changed, 23 insertions(+), 1 deletion(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>