I want to use a privileged instruction (diag, stidp, etc) in __asm__();
statement.

How do I get into supervisor state to run that and then return to problem
state?

The purpose of stidp is to verify I’m running on VM before I go doing “vm
things”. :-)

I’m expecting my program to run setuid as root if need be. But root on its
own isn’t enough. Makes sense, root should not imply supervisor state.

Thanks,
Don

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