Re: Restricting rdtsc [was: kernel aslr]

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Mar 28, 2017 at 11:30:52AM -0500, David Young wrote:
> [...]
> What do you mean by "legitimately" use rdtsc?  It seems to me that it
> is legitimate for a user to use a high-resolution timer to profile some
> code that's under development.  They may want to avoid running that code
> with root privileges under most circumstances.
> 

Sure.
At the very last a sysctl to remove the restriction is needed.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--