On 01/17/2018 01:11 AM, Thomas Huth wrote:
On 16.01.2018 20:37, Collin L. Walling wrote:
On 01/16/2018 01:23 PM, Thomas Huth wrote:
On 15.01.2018 17:44, Collin L. Walling wrote:
Reads boot menu flag and timeout values from the iplb and
sets the respective fields for the menu.
Signed-off-by: Collin L. Walling <wall...@linux.vnet.ibm.com>
---
[...]
diff --git a/pc-bios/s390-ccw/iplb.h b/pc-bios/s390-ccw/iplb.h
index fe909d2..da29e6e 100644
--- a/pc-bios/s390-ccw/iplb.h
+++ b/pc-bios/s390-ccw/iplb.h
@@ -81,6 +81,9 @@ extern IplParameterBlock iplb
__attribute__((__aligned__(PAGE_SIZE)));
#define S390_IPL_TYPE_CCW 0x02
#define S390_IPL_TYPE_QEMU_SCSI 0xff
+#define LOADPARM_PROMPT "PROMPT "
+#define LOADPARM_EMPTY "........"
I've got a question: Is there a (public) specification document
available somewhere for the loadparm field?
Unfortunately there does not seems to be any kind of documentation
regarding loadparm for
KVM on IBM z. Most of the information available on the IBM Knowledge
Center focuses on
z/VM, which isn't very helpful in this case :(
Ok, too bad :-(
Are there any specific questions that I can help with?
I was just wondering whether there are pre-defined values for this
field, e.g. is "PROMPT" something you came up with, or is this a value
that has been documented in a specification somewhere? ... I'm just
curious: If there is a list of pre-defined values somewhere, what are
the other values that the s390-ccw bios does not support yet?
We're mimicking zipl's behavior. It currently supports two use cases for
loadparm: setting an explicit boot index (by providing a valid integer),
and showing the boot menu without a timeout (by providing the string
'prompt').
Thomas
--
- Collin L Walling
