diff --git a/arch/x86/Kconfig.cpufeatures b/arch/x86/Kconfig.cpufeatures
index 250c10627ab3..733d5aff2456 100644
--- a/arch/x86/Kconfig.cpufeatures
+++ b/arch/x86/Kconfig.cpufeatures
@@ -124,6 +124,10 @@ config X86_DISABLED_FEATURE_PCID
 	def_bool y
 	depends on !X86_64
 
+config X86_DISABLED_FEATURE_LASS
+	def_bool y
+	depends on X86_32
+
 config X86_DISABLED_FEATURE_PKU
 	def_bool y
 	depends on !X86_INTEL_MEMORY_PROTECTION_KEYS
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index 80b68f4726e7..6f82302991d0 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -314,6 +314,7 @@
 #define X86_FEATURE_SM4			(12*32+ 2) /* SM4 instructions */
 #define X86_FEATURE_AVX_VNNI		(12*32+ 4) /* "avx_vnni" AVX VNNI instructions */
 #define X86_FEATURE_AVX512_BF16		(12*32+ 5) /* "avx512_bf16" AVX512 BFLOAT16 instructions */
+#define X86_FEATURE_LASS		(12*32+ 6) /* "lass" Linear Address Space Separation */
 #define X86_FEATURE_CMPCCXADD           (12*32+ 7) /* CMPccXADD instructions */
 #define X86_FEATURE_ARCH_PERFMON_EXT	(12*32+ 8) /* Intel Architectural PerfMon Extension */
 #define X86_FEATURE_FZRM		(12*32+10) /* Fast zero-length REP MOVSB */
diff --git a/arch/x86/include/uapi/asm/processor-flags.h b/arch/x86/include/uapi/asm/processor-flags.h
index f1a4adc78272..81d0c8bf1137 100644
--- a/arch/x86/include/uapi/asm/processor-flags.h
+++ b/arch/x86/include/uapi/asm/processor-flags.h
@@ -136,6 +136,8 @@
 #define X86_CR4_PKE		_BITUL(X86_CR4_PKE_BIT)
 #define X86_CR4_CET_BIT		23 /* enable Control-flow Enforcement Technology */
 #define X86_CR4_CET		_BITUL(X86_CR4_CET_BIT)
+#define X86_CR4_LASS_BIT	27 /* enable Linear Address Space Separation support */
+#define X86_CR4_LASS		_BITUL(X86_CR4_LASS_BIT)
 #define X86_CR4_LAM_SUP_BIT	28 /* LAM for supervisor pointers */
 #define X86_CR4_LAM_SUP		_BITUL(X86_CR4_LAM_SUP_BIT)