linux-kernel - [RFC PATCH 11/15] x86/pat: Replace Intel model checks with VFM ones

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Message-ID: <20241220213711.1892696-12-sohil.mehta@intel.com>
Date: Fri, 20 Dec 2024 21:37:06 +0000
From: Sohil Mehta <sohil.mehta@...el.com>
To: 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>,
	Sohil Mehta <sohil.mehta@...el.com>,
	Zhang Rui <rui.zhang@...el.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: [RFC PATCH 11/15] x86/pat: Replace Intel model checks with VFM ones

Introduce markers and names for some family 6 and family 15  models and
replace with VFM based checks.

Signed-off-by: Sohil Mehta <sohil.mehta@...el.com>
---
 arch/x86/include/asm/intel-family.h | 2 ++
 arch/x86/mm/pat/memtype.c           | 7 ++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/intel-family.h b/arch/x86/include/asm/intel-family.h
index 025d091be98e..76a184361930 100644
--- a/arch/x86/include/asm/intel-family.h
+++ b/arch/x86/include/asm/intel-family.h
@@ -186,8 +186,10 @@
 #define INTEL_QUARK_X1000		IFM(5, 0x09) /* Quark X1000 SoC */
 
 /* Family 15 */
+#define INTEL_FAM15_START		IFM(15, 0x00) /* Notational marker */
 #define INTEL_P4_WILLAMETTE		IFM(15, 0x01) /* Also Xeon Foster */
 #define INTEL_P4_PRESCOTT		IFM(15, 0x03)
+#define INTEL_P4_CEDARMILL		IFM(15, 0x06) /* Also Xeon Dempsey */
 
 /* Family 19 */
 #define INTEL_PANTHERCOVE_X		IFM(19, 0x01) /* Diamond Rapids */
diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c
index feb8cc6a12bf..e6d7dc608b77 100644
--- a/arch/x86/mm/pat/memtype.c
+++ b/arch/x86/mm/pat/memtype.c
@@ -43,6 +43,7 @@
 #include <linux/fs.h>
 #include <linux/rbtree.h>
 
+#include <asm/cpu_device_id.h>
 #include <asm/cacheflush.h>
 #include <asm/cacheinfo.h>
 #include <asm/processor.h>
@@ -290,9 +291,9 @@ void __init pat_bp_init(void)
 		return;
 	}
 
-	if ((c->x86_vendor == X86_VENDOR_INTEL) &&
-	    (((c->x86 == 0x6) && (c->x86_model <= 0xd)) ||
-	     ((c->x86 == 0xf) && (c->x86_model <= 0x6)))) {
+	if (c->x86_vendor == X86_VENDOR_INTEL &&
+	    ((c->x86_vfm >= INTEL_PENTIUM_PRO && c->x86_vfm <= INTEL_PENTIUM_M_DOTHAN) ||
+	    (c->x86_vfm > INTEL_FAM15_START && c->x86_vfm <= INTEL_P4_CEDARMILL))) {
 		/*
 		 * PAT support with the lower four entries. Intel Pentium 2,
 		 * 3, M, and 4 are affected by PAT errata, which makes the
-- 
2.43.0