🚀 go-pugleaf

 
The CPU in my notebook computer consumes much less power (i.e., goes
into a standby mode) when executing a HLT (halt) instruction.  I've
written a little utility that can tell when the CPU is being little-
utilized, and it slows down the clock to save power when it detects
that situation.  However, it would save even more if it executed the
HLT instruction.  That'd be no problem except that...
 
...the darn HLT instruction is privileged.
 
Of course, there is no good reason for it to be privileged... it is no
more "dangerous" than "JMP $".  However, Intel goofed (and Cyrix 
dutifully
cloned the goof), so there's nothing that I can do about it.
 
My question, then, is, "what is the best way to get a few bytes of
ring 0 code executed by my application?"  A device driver?  Or is there
a better/simpler way?
 
All advice will be appreciated...
 
-Dave