linux-kernel - Re: [PATCH 1/2] perf/x86/rapl: Add support for Intel Meteor Lake

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Message-ID: <Y7aejeHDpLlwwYbr@zn.tnic>
Date:   Thu, 5 Jan 2023 10:55:25 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Zhang, Rui" <rui.zhang@...el.com>
Cc:     "peterz@...radead.org" <peterz@...radead.org>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "kan.liang@...ux.intel.com" <kan.liang@...ux.intel.com>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>
Subject: Re: [PATCH 1/2] perf/x86/rapl: Add support for Intel Meteor Lake

On Thu, Jan 05, 2023 at 06:54:31AM +0000, Zhang, Rui wrote:
> I thought of this before and got some ideas related.
> Say, instead of maintaining the model list in a series of drivers, can
> we have something similar to "cpu_feature" instead?

Yes, you can define a synthetic X86_FEATURE flag and set it for each CPU model
which supports the feature in arch/x86/kernel/cpu/intel.c so that at least all
the model matching gunk is kept where it belongs, in the CPU init code and the
other code simply tests that flag.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette