rdmsr from userspace

[Andriy Gapon]

on 17/05/2008 13:12 Kostik Belousov said the following:
> On Sat, May 17, 2008 at 11:13:52AM +0300, 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?
> 
> I believe ports/sysutils/devcpu is what you need. In fact, I think this
> ought to be committed to the base. I do not know why Stas did not asked
> for this, at least at public.

Thanks a lot! This is exactly it.
I agree, this would be quite useful in the OS.

-- 
Andriy Gapon