From 9f718b57b846b8e1fa562584747fdae42ffed8f4 Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 24 Oct 2024 02:40:01 +0300
Subject: [PATCH] x86 specialreg: add bit masks definitions for LASS and LAM
 features

in CPUID Structured Extended Features %eax 0x7 leaf 1 %eax, from
Intel SDM vol. 2 rev. 085.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
---
 sys/x86/include/specialreg.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys/x86/include/specialreg.h b/sys/x86/include/specialreg.h
index ab172ec54ff..51c513b6a5a 100644
--- a/sys/x86/include/specialreg.h
+++ b/sys/x86/include/specialreg.h
@@ -534,6 +534,12 @@
 #define	CPUID_STDEXT3_CORE_CAP		0x40000000
 #define	CPUID_STDEXT3_SSBD		0x80000000
 
+/*
+ * CPUID instruction 7 Structured Extended Features, leaf 1 eax info
+ */
+#define	CPUID_STDEXT4_LASS		0x00000040
+#define	CPUID_STDEXT4_LAM		0x04000000
+
 /* CPUID_HYBRID_ID leaf 0x1a */
 #define	CPUID_HYBRID_CORE_MASK	0xff000000
 #define	CPUID_HYBRID_SMALL_CORE	0x20000000