linux-kernel - Re: [PATCH] x86/cpu: Rename Denverton and Gemini Lake

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Message-ID: <20180807195945.GK2494@hirez.programming.kicks-ass.net>
Date:   Tue, 7 Aug 2018 21:59:45 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        kan.liang@...ux.intel.com, tglx@...utronix.de, mingo@...hat.com,
        len.brown@...el.com, linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH] x86/cpu: Rename Denverton and Gemini Lake

On Tue, Aug 07, 2018 at 11:37:36AM -0700, Andi Kleen wrote:
> On Tue, Aug 07, 2018 at 07:48:51PM +0200, Peter Zijlstra wrote:
> > On Tue, Aug 07, 2018 at 10:35:42AM -0700, Dave Hansen wrote:
> > > On 08/07/2018 10:17 AM, kan.liang@...ux.intel.com wrote:
> > > > Denverton and Gemini Lake are platform names and should not be used for
> > > > Processor Family stuff. The microarchitecture codename should be used.
> > > 
> > > Why?
> > > 
> > > Denverton is the platform.  "Goldmont" is literally the
> > > microarchitecture, and you are suggesting moving *to* the
> > > microarchitecture name, which contradicts the description.
> > 
> > All the other (big core) are uarch names. Atom is weird in that it mixes
> > uarch with platform names.
> 
> On most big core the platform/SOC just happens to have the same name as the 
> uarch. But the identifiers really have to be per SOC because that 
> is how Intel model numbers work.

I'm sure that is how we ended up with two SKX parts with identical model
numbers but different crystal frequencies :-(

Let's just keep consistency and use MICROARCH_TYPE things for
everything.