Re: [patch] paravirt: isolate module ops

[Rusty Russell]

On Sat, 2007-01-06 at 12:55 -0800, Zachary Amsden wrote:
> Rusty Russell wrote:
> >
> > +int paravirt_write_msr(unsigned int msr, u64 val);
> 
> If binary modules using debug registers makes us nervous, the 
> reprogramming MSRs is also similarly bad.

Yes, but this is simply from experience.  Several modules wrote msrs
(you can take out the EXPORT_SYMBOL and find them quite quickly).

> > +void raw_safe_halt(void);
> > +void halt(void);
> 
> These shouldn't be done by modules, ever.  Only the scheduler should 
> decide to halt.

Several modules implement alternate halt loops.  I guess being in a
module for specific CPUs makes sense...

Cheers!
Rusty.

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