7 files changed, 0 insertions, 66 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 93173f0a09c7..b6f57cc1e4df 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1873,22 +1873,6 @@ config ARM64_PAN
 	  The feature is detected at runtime, and will remain as a 'nop'
 	  instruction if the cpu does not implement the feature.
 
-config ARM64_LSE_ATOMICS
-	bool
-	default ARM64_USE_LSE_ATOMICS
-
-config ARM64_USE_LSE_ATOMICS
-	bool "Atomic instructions"
-	default y
-	help
-	  As part of the Large System Extensions, ARMv8.1 introduces new
-	  atomic instructions that are designed specifically to scale in
-	  very large systems.
-
-	  Say Y here to make use of these instructions for the in-kernel
-	  atomic routines. This incurs a small overhead on CPUs that do
-	  not support these instructions.
-
 endmenu # "ARMv8.1 architectural features"
 
 menu "ARMv8.2 architectural features"
diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index e1d30ba99d01..f463a654a2bb 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -671,7 +671,6 @@ u32 aarch64_insn_gen_extr(enum aarch64_insn_variant variant,
 			  enum aarch64_insn_register Rn,
 			  enum aarch64_insn_register Rd,
 			  u8 lsb);
-#ifdef CONFIG_ARM64_LSE_ATOMICS
 u32 aarch64_insn_gen_atomic_ld_op(enum aarch64_insn_register result,
 				  enum aarch64_insn_register address,
 				  enum aarch64_insn_register value,
@@ -683,28 +682,6 @@ u32 aarch64_insn_gen_cas(enum aarch64_insn_register result,
 			 enum aarch64_insn_register value,
 			 enum aarch64_insn_size_type size,
 			 enum aarch64_insn_mem_order_type order);
-#else
-static inline
-u32 aarch64_insn_gen_atomic_ld_op(enum aarch64_insn_register result,
-				  enum aarch64_insn_register address,
-				  enum aarch64_insn_register value,
-				  enum aarch64_insn_size_type size,
-				  enum aarch64_insn_mem_atomic_op op,
-				  enum aarch64_insn_mem_order_type order)
-{
-	return AARCH64_BREAK_FAULT;
-}
-
-static inline
-u32 aarch64_insn_gen_cas(enum aarch64_insn_register result,
-			 enum aarch64_insn_register address,
-			 enum aarch64_insn_register value,
-			 enum aarch64_insn_size_type size,
-			 enum aarch64_insn_mem_order_type order)
-{
-	return AARCH64_BREAK_FAULT;
-}
-#endif
 u32 aarch64_insn_gen_dmb(enum aarch64_insn_mb_type type);
 u32 aarch64_insn_gen_dsb(enum aarch64_insn_mb_type type);
 u32 aarch64_insn_gen_mrs(enum aarch64_insn_register result,
diff --git a/arch/arm64/include/asm/lse.h b/arch/arm64/include/asm/lse.h
index 3129a5819d0e..1e77c45bb0a8 100644
--- a/arch/arm64/include/asm/lse.h
+++ b/arch/arm64/include/asm/lse.h
@@ -4,8 +4,6 @@
 
 #include <asm/atomic_ll_sc.h>
 
-#ifdef CONFIG_ARM64_LSE_ATOMICS
-
 #define __LSE_PREAMBLE	".arch_extension lse\n"
 
 #include <linux/compiler_types.h>
@@ -27,11 +25,4 @@
 #define ARM64_LSE_ATOMIC_INSN(llsc, lse)				\
 	ALTERNATIVE(llsc, __LSE_PREAMBLE lse, ARM64_HAS_LSE_ATOMICS)
 
-#else	/* CONFIG_ARM64_LSE_ATOMICS */
-
-#define __lse_ll_sc_body(op, ...)		__ll_sc_##op(__VA_ARGS__)
-
-#define ARM64_LSE_ATOMIC_INSN(llsc, lse)	llsc
-
-#endif	/* CONFIG_ARM64_LSE_ATOMICS */
 #endif	/* __ASM_LSE_H */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index c840a93b9ef9..547ccf28f289 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2560,7 +2560,6 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
 		ARM64_CPUID_FIELDS(ID_AA64MMFR1_EL1, PAN, PAN3)
 	},
 #endif /* CONFIG_ARM64_EPAN */
-#ifdef CONFIG_ARM64_LSE_ATOMICS
 	{
 		.desc = "LSE atomic instructions",
 		.capability = ARM64_HAS_LSE_ATOMICS,
@@ -2568,7 +2567,6 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
 		.matches = has_cpuid_feature,
 		ARM64_CPUID_FIELDS(ID_AA64ISAR0_EL1, ATOMIC, IMP)
 	},
-#endif /* CONFIG_ARM64_LSE_ATOMICS */
 	{
 		.desc = "Virtualization Host Extensions",
 		.capability = ARM64_HAS_VIRT_HOST_EXTN,
diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c
index 53bf70126f81..6cbcec041a9d 100644
--- a/arch/arm64/kvm/at.c
+++ b/arch/arm64/kvm/at.c
@@ -1700,7 +1700,6 @@ int __kvm_find_s1_desc_level(struct kvm_vcpu *vcpu, u64 va, u64 ipa, int *level)
 	}
 }
 
-#ifdef CONFIG_ARM64_LSE_ATOMICS
 static int __lse_swap_desc(u64 __user *ptep, u64 old, u64 new)
 {
 	u64 tmp = old;
@@ -1725,12 +1724,6 @@ static int __lse_swap_desc(u64 __user *ptep, u64 old, u64 new)
 
 	return ret;
 }
-#else
-static int __lse_swap_desc(u64 __user *ptep, u64 old, u64 new)
-{
-	return -EINVAL;
-}
-#endif
 
 static int __llsc_swap_desc(u64 __user *ptep, u64 old, u64 new)
 {
diff --git a/arch/arm64/lib/insn.c b/arch/arm64/lib/insn.c
index 4e298baddc2e..cc5b40917d0d 100644
--- a/arch/arm64/lib/insn.c
+++ b/arch/arm64/lib/insn.c
@@ -611,7 +611,6 @@ u32 aarch64_insn_gen_load_store_ex(enum aarch64_insn_register reg,
 					    state);
 }
 
-#ifdef CONFIG_ARM64_LSE_ATOMICS
 static u32 aarch64_insn_encode_ldst_order(enum aarch64_insn_mem_order_type type,
 					  u32 insn)
 {
@@ -755,7 +754,6 @@ u32 aarch64_insn_gen_cas(enum aarch64_insn_register result,
 	return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RS, insn,
 					    value);
 }
-#endif
 
 u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
 				 enum aarch64_insn_register src,
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 74dd29816f36..008612aa4131 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -776,7 +776,6 @@ static int emit_atomic_ld_st(const struct bpf_insn *insn, struct jit_ctx *ctx)
 	return 0;
 }
 
-#ifdef CONFIG_ARM64_LSE_ATOMICS
 static int emit_lse_atomic(const struct bpf_insn *insn, struct jit_ctx *ctx)
 {
 	const u8 code = insn->code;
@@ -843,12 +842,6 @@ static int emit_lse_atomic(const struct bpf_insn *insn, struct jit_ctx *ctx)
 
 	return 0;
 }
-#else
-static inline int emit_lse_atomic(const struct bpf_insn *insn, struct jit_ctx *ctx)
-{
-	return -EINVAL;
-}
-#endif
 
 static int emit_ll_sc_atomic(const struct bpf_insn *insn, struct jit_ctx *ctx)
 {