linux-kernel - Re: [PATCH v2 14/17] x86/acpi/cstate: Improve Intel Family model checks

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Message-ID: <b262cb35-4753-49bb-8db7-7195cc856d1f@intel.com>
Date: Tue, 11 Feb 2025 13:20:00 -0800
From: Dave Hansen <dave.hansen@...el.com>
To: Sohil Mehta <sohil.mehta@...el.com>, x86@...nel.org,
 Dave Hansen <dave.hansen@...ux.intel.com>, Tony Luck <tony.luck@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
 Adrian Hunter <adrian.hunter@...el.com>,
 Kan Liang <kan.liang@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>,
 Borislav Petkov <bp@...en8.de>, "H . Peter Anvin" <hpa@...or.com>,
 "Rafael J . Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
 Andy Lutomirski <luto@...nel.org>, Viresh Kumar <viresh.kumar@...aro.org>,
 Fenghua Yu <fenghua.yu@...el.com>, Jean Delvare <jdelvare@...e.com>,
 Guenter Roeck <linux@...ck-us.net>, Zhang Rui <rui.zhang@...el.com>,
 Andrew Cooper <andrew.cooper3@...rix.com>,
 David Laight <david.laight.linux@...il.com>,
 linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-acpi@...r.kernel.org, linux-pm@...r.kernel.org,
 linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v2 14/17] x86/acpi/cstate: Improve Intel Family model
 checks

On 2/11/25 11:44, Sohil Mehta wrote:
> Update the Intel Family checks to consistently use Family 15 instead of
> Family 0xF. Also, get rid of one of last usages of x86_model by using
> the new VFM checks.
> 
> Update the incorrect comment since the check has changed[1][2] since the
> initial commit ee1ca48fae7e ("ACPI: Disable ARB_DISABLE on platforms
> where it is not needed").
> 
> [1]: commit 3e2ada5867b7 ("ACPI: fix Compaq Evo N800c (Pentium 4m) boot
> hang regression") removed the P4 - Family 15.
> 
> [2]: commit 03a05ed11529 ("ACPI: Use the ARB_DISABLE for the CPU which
> model id is less than 0x0f.") got rid of CORE_YONAH - Family 6, model E.
> 
> Signed-off-by: Sohil Mehta <sohil.mehta@...el.com>

Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>