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List:       linux-kernel
Subject:    Re: MSR support for x86
From:       "H. Peter Anvin" <hpa () transmeta ! com>
Date:       1997-02-28 20:25:35
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> On 28 Feb 1997, H. Peter Anvin wrote:
> > > This is an interesting suggestion :)
> > > If we implement this, it should be tightly secured since any user could
> > > mess around with the 2nd level cache. A possible application could be a
> > > CPU manager!
> > > 
> > 
> > I think letting any non-root user messing with the MSRs or anything
> > like that is asking for trouble in a big way.  /dev/msr definitely
> > should be a root-only device!
> > 
> > 	-hpa
> 
> I'm not a security expert, but isn't it enough to set permissions to
> something like crw------- ?
> 

That's a root-only device...

	-hpa


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