path: root/crypto/Makefile
diff options
authorArd Biesheuvel <>2019-08-12 01:59:12 +0300
committerHerbert Xu <>2019-08-15 21:52:15 +1000
commit198429631a85622da1d08d360ef02cfb84c95919 (patch)
treecaef44903f6bac05a5757847a2df17fd4c8f947e /crypto/Makefile
parenta4397635afea5d127548d64e0055ed471ef2d5be (diff)
crypto: arm64/aegis128 - implement plain NEON version
Provide a version of the core AES transform to the aegis128 SIMD code that does not rely on the special AES instructions, but uses plain NEON instructions instead. This allows the SIMD version of the aegis128 driver to be used on arm64 systems that do not implement those instructions (which are not mandatory in the architecture), such as the Raspberry Pi 3. Since GCC makes a mess of this when using the tbl/tbx intrinsics to perform the sbox substitution, preload the Sbox into v16..v31 in this case and use inline asm to emit the tbl/tbx instructions. Clang does not support this approach, nor does it require it, since it does a much better job at code generation, so there we use the intrinsics as usual. Cc: Nick Desaulniers <> Signed-off-by: Ard Biesheuvel <> Acked-by: Nick Desaulniers <> Signed-off-by: Herbert Xu <>
Diffstat (limited to 'crypto/Makefile')
1 files changed, 8 insertions, 1 deletions
diff --git a/crypto/Makefile b/crypto/Makefile
index 99a9fa9087d1..0d2cdd523fd9 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -98,7 +98,14 @@ CFLAGS_aegis128-neon-inner.o += -mfpu=crypto-neon-fp-armv8
aegis128-$(CONFIG_CRYPTO_AEGIS128_SIMD) += aegis128-neon.o aegis128-neon-inner.o
ifeq ($(ARCH),arm64)
-CFLAGS_aegis128-neon-inner.o += -ffreestanding -mcpu=generic+crypto
+aegis128-cflags-y := -ffreestanding -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 \
+ -ffixed-q25 -ffixed-q26 -ffixed-q27 \
+ -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