linux-kernel - Re: [PATCH v2 2/3] x86/cpu: Add new Intel Atom CPU model name

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Message-ID: <20190821093910.GW2349@hirez.programming.kicks-ass.net>
Date:   Wed, 21 Aug 2019 11:39:10 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Tanwar, Rahul" <rahul.tanwar@...ux.intel.com>
Cc:     "Luck, Tony" <tony.luck@...el.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>, "hpa@...or.com" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "Shevchenko, Andriy" <andriy.shevchenko@...el.com>,
        "alan@...ux.intel.com" <alan@...ux.intel.com>,
        "ricardo.neri-calderon@...ux.intel.com" 
        <ricardo.neri-calderon@...ux.intel.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Wu, Qiming" <qi-ming.wu@...el.com>,
        "Kim, Cheol Yong" <cheol.yong.kim@...el.com>,
        "Tanwar, Rahul" <rahul.tanwar@...el.com>
Subject: Re: [PATCH v2 2/3] x86/cpu: Add new Intel Atom CPU model name

On Wed, Aug 21, 2019 at 11:21:43AM +0800, Tanwar, Rahul wrote:
> On 20/8/2019 10:57 PM, Peter Zijlstra wrote:

> > What would describe the special sause that warranted a new SOC? If this
> > thing is marketed as 'Network Processor' then I suppose we can actually
> > use it, esp. if we're going to see this more, like the MID thing -- that
> > lived for a while over multiple uarchs.

> This SoC uses AMT (Admantium/Airmont) configuration which is supposed to be
> a higher configuration.

That's just words without meaning on this end. What's an Adamantium ?
Google doesn't seem to give any sort of clues..

And will we see more of these things, or is it a one off SOC?

> Looking at other existing examples, it seems that
> INTEL_FAM6_ATOM_AIRMONT_PLUS is most appropriate. Would you have any
> concerns with _PLUS name ? Thanks.

Yes, _PLUS is not an existing _OPTDIFF, the uarch is called "Goldmont
Plus", it is the 14nm refresh of the 14nm Goldmont, and predecessor of
Tremont.