"The Faery Monarch (La Fea Regxo)" wrote:
>
>
> I´m not sure HOW secret is this Serial Number Feature is...
> I´ve found some information about Processor Serial Number, is at:
> http://developer.intel.com/technology/itj/Q21999/ARTICLES/art_3.htm
>
> On the Third Page: (You may have to nagative to it manually from the
> above URL)
> http://developer.intel.com/technology/itj/Q21999/ARTICLES/art_3c.htm
> It tells how it can be retrieved from the CPUID instruction.
>
> See also: http://developer.intel.com/drg/pentiumiii/psnum/index.htm
>
> That is all that I have time for. I might have to read those Technical
> manuals or something.
I had scanned those docs before. I don't remember seeing anything
in there on which control bit to use to disable the PSN.
Anyhow, I think the key is to have the host OS disable the PSN
bit. Since CPUID can be run at any privilege level, this would
allow us to let it run natively and return 'disabled' from user
software, as though the BIOS disabled it.
We could have the VM code disable the bit, but then PSN
could not be used in the host from thereon. (What a freeken shame)
-Kevin
