On Sat, 17 May 2008 18:26:01 +0100
Rui Paulo <[EMAIL PROTECTED]> wrote:
> Andriy Gapon wrote:
> > on 17/05/2008 18:37 Rui Paulo said the following:
> >> Andriy Gapon wrote:
> >>>
> >>> It seems that rdmsr instruction can be executed only at the highest
> >>> privilege level and thus is not permitted from userland. Maybe we
> >>> should provide something like Linux /dev/cpu/msr?
> >>> I don't like interface of that device, I think that ioctl approach
> >>> would be preferable in this case.
> >>> Something like create /dev/cpuN and allow some ioctls on it:
> >>> ioctl(cpu_fd, CPU_RDMSR, arg).
> >>> What do you think?
> >>>
> >>
> >> While I think this (devcpu) is good for testing and development, I
> >> prefer having a device driver to handle that specific MSR than a
> >> generic /dev/cpuN where you can issue MSRs.
> >> Both for security and reliability reasons.
> >
> > What about /dev/pci, /dev/io? Aren't they a precedent?
>
> They are, but, IMHO, we should no longer continue to create this type of
> interfaces.
Ok, in relation to the question I asked about sysctl's vs. /dev/* -
why not?
<mike
--
Mike Meyer <[EMAIL PROTECTED]> http://www.mired.org/consulting.html
Independent Network/Unix/Perforce consultant, email for more information.
O< ascii ribbon campaign - stop html mail - www.asciiribbon.org
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
