On Thursday, 06/23/2016 at 09:14 GMT, Mark Post <mp...@suse.com> wrote:
> I don't think it's a Hercules requirement, necessarily.  Ubuntu requires 
a zEC12 or later machine
> to run.  If you can get Hercules to report that, then you should be OK.

To be clear, the checks are not based on a machine type or model, per se. 
Rather, the OS is checking for the availability of needed instructions, 
service processor functionality, and I/O subsystem capability 
(collectively called 'facilities').  So you could change the CPU ID to 
report a zEC12, for example, but unless the various facilities the OS 
wants are available, you will still get BADCCC.

I.e. a zEC12 GA2 machine will have more facilities available than a GA1 
machine, but the machine type and model remains unchanged.

To see how instruction behavior is assessed, look at the STORE FACILITIES 
LIST EXTENDED (STFLE) instruction.

Alan Altmark

Senior Managing z/VM and Linux Consultant
Lab Services System z Delivery Practice
IBM Systems & Technology Group
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott

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