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[RFC,08/15] x86/cpu/intel: Replace early family 6 checks with VFM ones

Message ID 20241220213711.1892696-9-sohil.mehta@intel.com
State New
Headers show
Series Prepare for new Intel family models | expand

Commit Message

Sohil Mehta Dec. 20, 2024, 9:37 p.m. UTC 
Introduce names for some old pentium models and replace with VFM based
checks.

Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
---
 arch/x86/include/asm/intel-family.h |  3 +++
 arch/x86/kernel/cpu/intel.c         | 13 ++++++-------
 2 files changed, 9 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/include/asm/intel-family.h b/arch/x86/include/asm/intel-family.h
index 6d7b04ffc5fd..41278093bcd4 100644
--- a/arch/x86/include/asm/intel-family.h
+++ b/arch/x86/include/asm/intel-family.h
@@ -46,6 +46,9 @@ 
 #define INTEL_ANY			IFM(X86_FAMILY_ANY, X86_MODEL_ANY)
 
 #define INTEL_PENTIUM_PRO		IFM(6, 0x01)
+#define INTEL_PENTIUM_II_KLAMATH	IFM(6, 0x03)
+#define INTEL_PENTIUM_III_TUALATIN	IFM(6, 0x0B)
+#define INTEL_PENTIUM_M_DOTHAN		IFM(6, 0x0D)
 
 #define INTEL_CORE_YONAH		IFM(6, 0x0E)
 
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index f44b2e618fb3..cde8f45ccd57 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -195,7 +195,7 @@  void intel_unlock_cpuid_leafs(struct cpuinfo_x86 *c)
 	if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
 		return;
 
-	if (c->x86 < 6 || (c->x86 == 6 && c->x86_model < 0xd))
+	if (c->x86_vfm < INTEL_PENTIUM_M_DOTHAN)
 		return;
 
 	/*
@@ -301,7 +301,7 @@  static void early_init_intel(struct cpuinfo_x86 *c)
 	 * If fast string is not enabled in IA32_MISC_ENABLE for any reason,
 	 * clear the fast string and enhanced fast string CPU capabilities.
 	 */
-	if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
+	if (c->x86_vfm >= INTEL_PENTIUM_M_DOTHAN) {
 		rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
 		if (!(misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING)) {
 			pr_info("Disabled fast string operations\n");
@@ -350,9 +350,7 @@  static void bsp_init_intel(struct cpuinfo_x86 *c)
 int ppro_with_ram_bug(void)
 {
 	/* Uses data from early_cpu_detect now */
-	if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
-	    boot_cpu_data.x86 == 6 &&
-	    boot_cpu_data.x86_model == 1 &&
+	if (boot_cpu_data.x86_vfm == INTEL_PENTIUM_PRO &&
 	    boot_cpu_data.x86_stepping < 8) {
 		pr_info("Pentium Pro with Errata#50 detected. Taking evasive action.\n");
 		return 1;
@@ -413,7 +411,8 @@  static void intel_workarounds(struct cpuinfo_x86 *c)
 	 * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until
 	 * model 3 mask 3
 	 */
-	if ((c->x86<<8 | c->x86_model<<4 | c->x86_stepping) < 0x633)
+	if ((c->x86_vfm == INTEL_PENTIUM_II_KLAMATH && c->x86_stepping < 3) ||
+	    c->x86_vfm < INTEL_PENTIUM_II_KLAMATH)
 		clear_cpu_cap(c, X86_FEATURE_SEP);
 
 	/*
@@ -620,7 +619,7 @@  static unsigned int intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
 	 * to determine which, so we use a boottime override
 	 * for the 512kb model, and assume 256 otherwise.
 	 */
-	if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
+	if (c->x86_vfm == INTEL_PENTIUM_III_TUALATIN && size == 0)
 		size = 256;
 
 	/*