crypto: x86/aes - drop scalar assembler implementations

The AES assembler code for x86 isn't actually faster than code generated by the compiler from aes_generic.c, and considering the disproportionate maintenance burden of assembler code on x86, it is better just to drop it entirely. Modern x86 systems will use AES-NI anyway, and given that the modules being removed have a dependency on aes_generic already, we can remove them without running the risk of regressions. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
mariux64 · Jul 26, 2019 · 1d2c327 · 1d2c327
1 parent 2c53fd1
commit 1d2c327
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diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
@@ -14,11 +14,9 @@ sha256_ni_supported :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,yes,no)
 
 obj-$(CONFIG_CRYPTO_GLUE_HELPER_X86) += glue_helper.o
 
-obj-$(CONFIG_CRYPTO_AES_586) += aes-i586.o
 obj-$(CONFIG_CRYPTO_TWOFISH_586) += twofish-i586.o
 obj-$(CONFIG_CRYPTO_SERPENT_SSE2_586) += serpent-sse2-i586.o
 
-obj-$(CONFIG_CRYPTO_AES_X86_64) += aes-x86_64.o
 obj-$(CONFIG_CRYPTO_DES3_EDE_X86_64) += des3_ede-x86_64.o
 obj-$(CONFIG_CRYPTO_CAMELLIA_X86_64) += camellia-x86_64.o
 obj-$(CONFIG_CRYPTO_BLOWFISH_X86_64) += blowfish-x86_64.o
@@ -68,11 +66,9 @@ ifeq ($(avx2_supported),yes)
 	obj-$(CONFIG_CRYPTO_MORUS1280_AVX2) += morus1280-avx2.o
 endif
 
-aes-i586-y := aes-i586-asm_32.o aes_glue.o
 twofish-i586-y := twofish-i586-asm_32.o twofish_glue.o
 serpent-sse2-i586-y := serpent-sse2-i586-asm_32.o serpent_sse2_glue.o
 
-aes-x86_64-y := aes-x86_64-asm_64.o aes_glue.o
 des3_ede-x86_64-y := des3_ede-asm_64.o des3_ede_glue.o
 camellia-x86_64-y := camellia-x86_64-asm_64.o camellia_glue.o
 blowfish-x86_64-y := blowfish-x86_64-asm_64.o blowfish_glue.o

diff --git a/arch/x86/crypto/aes-i586-asm_32.S b/arch/x86/crypto/aes-i586-asm_32.S