Subject: [PATCH 6/8] crypto: aegis128 - Use neon-intrinsics.h on ARM too

From: Ard Biesheuvel <[email-masked]>
Date: Wed, 22 Apr 2026 19:17:02 +0200

From: Ard Biesheuvel <[email-masked]>

Use the asm/neon-intrinsics.h header on ARM as well as arm64, so that
the calling code does not have to know the difference.

Clean up the Makefile a bit while at it.

Signed-off-by: Ard Biesheuvel <[email-masked]>
---
 crypto/Makefile              | 10 ++++------
 crypto/aegis128-neon-inner.c |  4 +---
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/crypto/Makefile b/crypto/Makefile
index 162242593c7c..69d1a18e8519 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -103,13 +103,14 @@ obj-$(CONFIG_CRYPTO_CHACHA20POLY1305) += chacha20poly1305.o
 obj-$(CONFIG_CRYPTO_AEGIS128) += aegis128.o
 aegis128-y := aegis128-core.o
 
+CFLAGS_aegis128-neon-inner.o += $(CC_FLAGS_FPU)
+CFLAGS_REMOVE_aegis128-neon-inner.o += $(CC_FLAGS_NO_FPU)
 ifeq ($(ARCH),arm)
-CFLAGS_aegis128-neon-inner.o += -ffreestanding -march=armv8-a -mfloat-abi=softfp
-CFLAGS_aegis128-neon-inner.o += -mfpu=crypto-neon-fp-armv8
+CFLAGS_aegis128-neon-inner.o += -march=armv8-a -mfpu=crypto-neon-fp-armv8
 aegis128-$(CONFIG_CRYPTO_AEGIS128_SIMD) += aegis128-neon.o aegis128-neon-inner.o
 endif
 ifeq ($(ARCH),arm64)
-aegis128-cflags-y := -ffreestanding -mcpu=generic+crypto
+aegis128-cflags-y := -mcpu=generic+crypto
 aegis128-cflags-$(CONFIG_CC_IS_GCC) += -ffixed-q16 -ffixed-q17 -ffixed-q18 \
 				       -ffixed-q19 -ffixed-q20 -ffixed-q21 \
 				       -ffixed-q22 -ffixed-q23 -ffixed-q24 \
@@ -117,11 +118,8 @@ aegis128-cflags-$(CONFIG_CC_IS_GCC) += -ffixed-q16 -ffixed-q17 -ffixed-q18 \
 				       -ffixed-q28 -ffixed-q29 -ffixed-q30 \
 				       -ffixed-q31
 CFLAGS_aegis128-neon-inner.o += $(aegis128-cflags-y)
-CFLAGS_REMOVE_aegis128-neon-inner.o += -mgeneral-regs-only
 aegis128-$(CONFIG_CRYPTO_AEGIS128_SIMD) += aegis128-neon.o aegis128-neon-inner.o
 endif
-# Enable <arm_neon.h>
-CFLAGS_aegis128-neon-inner.o += -isystem $(shell $(CC) -print-file-name=include)
 
 obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
 obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
diff --git a/crypto/aegis128-neon-inner.c b/crypto/aegis128-neon-inner.c
index b6a52a386b22..56b534eeb680 100644
--- a/crypto/aegis128-neon-inner.c
+++ b/crypto/aegis128-neon-inner.c
@@ -3,13 +3,11 @@
  * Copyright (C) 2019 Linaro, Ltd. <[email-masked]>
  */
 
-#ifdef CONFIG_ARM64
 #include <asm/neon-intrinsics.h>
 
+#ifdef CONFIG_ARM64
 #define AES_ROUND	"aese %0.16b, %1.16b \n\t aesmc %0.16b, %0.16b"
 #else
-#include <arm_neon.h>
-
 #define AES_ROUND	"aese.8 %q0, %q1 \n\t aesmc.8 %q0, %q0"
 #endif
 
-- 
2.54.0.rc1.555.g9c883467ad-goog