Re: i686 quirk for AMD Geode

H. Peter Anvin
2009-11-17T16:44:17Z

On 11/17/2009 06:34 AM, Lennart Sorensen wrote:
> On Tue, Nov 17, 2009 at 11:59:29AM +0000, Alan Cox wrote:
>>> Trying rdmsr from msr-tools 1.2 gives me:
>>>
>>> # ./rdmsr -x 0x00001810
>>> rdmsr: CPU 0 cannot read MSR 0x00001810
>>>
>>> Hmm, now what?
>>
>> Beats me - I thought the region registers were read/write.
>
> Actually it seems I can't read any MSRs on it.
>
> Using the same kernel, same msr module, same rdmsr on a Geode LX system
> works fine. I can read MSRs no problem. Seems the msr module isn't
> working on the Geode SC1200 (and hence possibly the GX1).
>

That would seem highly unlikely ... unless the MSR flag isn't exposed in
CPUID.

-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.