re: bin/41289: usr.sbin/cpuctl does not correctly identify new Intel CPUs

[Paul Goyette <paul%whooppee.com@localhost>]

On Tue, 28 Apr 2009, matthew green wrote:

>    > One thing stikes me about this. If we get a text string out of the CPU, why
>    > bother trying to pretty-print further?
>
>    Hmm, good question.  I'd always thought that the text string was
>    actually loaded into the CPU by BIOS, but I just checked the spec, and
>    that doesn't seem to be true.  (Maybe it is true for AMD processors, I
>    really don't know anymore.)  Regardless, as I see it, we've always tried
>    to make our own determination.
>
>
> my reading of the intel or amd manual a month or so ago said that
> the bios is expected to load 48 chars for the cpuid string.  i don't
> recall which off hand, but i think intel.

Actually, I recall that same expectation, but it was from reading the 
AMD manuals a long time ago (when I got my first AMD Famile 10h CPU).

The Intel manual seems somewhat unclear on how those 48-bytes get 
loaded.

Regardless, I'm in the process of test-compiling a first-draft update 
that will

1. Properly identify the Extended Models within a family
2. Properly identify several new Intel cache descriptors (including
   some that are 6-way, 12-way, and 24-way associative!)
3. Split the Intel features2 line to avoid excessive line length

It should be ready for review later tonight or early tomorrow.

Suggestions for which list(s) on which I should post the request-for- 
review would be appreciated!  This is a /usr/sbin utility, but might 
more reasonably fit into tech-kern than tech-user?


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