Re: [PATCH v4 1/4] x86/microcode: Refactor platform ID enumeration into a helper

[Sohil Mehta]

On 3/4/2026 5:38 PM, Pawan Gupta wrote:
> On Wed, Mar 04, 2026 at 10:10:18AM -0800, Dave Hansen wrote:

>> Also note that the PII is weird. It does not really have a platform
>> ID because it doesn't even have the MSR. Just consider it to be
>> platform ID 0. Instead of saying >=PII, say <=PII. The PII is the
> 				     ^
> 				     I think you meant PIII here?
> 

What Dave has here is correct. You can blame me for the confusion.
Family 6, model 5 is DESCHUTES but Pentium II and not III.

I incorrectly named it INTEL_PENTIUM_III_DESCHUTES in commit
7e6b0a2e4152 ("x86/microcode: Update the Intel processor flag scan
check"). It should have been named INTEL_PENTIUM_II_DESCHUTES.

Anyway, there are no other users of this. So after this series merges
I'll send a cleanup patch deleting the #define completely.

>> real oddball here being the only CPU with Linux microcode updates
>> but no platform ID. It's worth calling it out by name.
>>