>>> On 5/25/2009 at  9:05 AM, Arye Shemer <[email protected]> wrote: 
> Hello forumers,
> 
> I need to detect the existence of IFL (Integrated Facility for Linux
> processor) while running in z/VM,
> 
> (any method will do: Assembler, High level language, system command etc*)

I'm not aware of any method to tell an IFL apart from a CP, except for trying 
to execute the one instruction that is different between the two (which IBM no 
longer talks about in public).  I don't think you want to try that route, 
however, since if you do manage to execute it on an IFL, your system will check 
stop.  Since I'm not familiar with all the new hardware instructions that have 
been introduced, it's possible that stfle instruction might give you a hint.

What need do you have to distinguish an IFL versus a CP?


Mark Post

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