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e96cb9507f
Consolidate the CPU-based SHA-256 code into a single module, following what I did with SHA-512: - Each arch now provides a header file lib/crypto/$(SRCARCH)/sha256.h, replacing lib/crypto/$(SRCARCH)/sha256.c. The header defines sha256_blocks() and optionally sha256_mod_init_arch(). It is included by lib/crypto/sha256.c, and thus the code gets built into the single libsha256 module, with proper inlining and dead code elimination. - sha256_blocks_generic() is moved from lib/crypto/sha256-generic.c into lib/crypto/sha256.c. It's now a static function marked with __maybe_unused, so the compiler automatically eliminates it in any cases where it's not used. - Whether arch-optimized SHA-256 is buildable is now controlled centrally by lib/crypto/Kconfig instead of by lib/crypto/$(SRCARCH)/Kconfig. The conditions for enabling it remain the same as before, and it remains enabled by default. - Any additional arch-specific translation units for the optimized SHA-256 code (such as assembly files) are now compiled by lib/crypto/Makefile instead of lib/crypto/$(SRCARCH)/Makefile. Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20250630160645.3198-13-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
26 lines
952 B
Makefile
26 lines
952 B
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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obj-$(CONFIG_CRYPTO_BLAKE2S_ARM) += libblake2s-arm.o
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libblake2s-arm-y := blake2s-core.o blake2s-glue.o
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obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha-neon.o
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chacha-neon-y := chacha-scalar-core.o chacha-glue.o
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chacha-neon-$(CONFIG_KERNEL_MODE_NEON) += chacha-neon-core.o
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obj-$(CONFIG_CRYPTO_POLY1305_ARM) += poly1305-arm.o
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poly1305-arm-y := poly1305-core.o poly1305-glue.o
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quiet_cmd_perl = PERL $@
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cmd_perl = $(PERL) $(<) > $(@)
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$(obj)/%-core.S: $(src)/%-armv4.pl
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$(call cmd,perl)
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clean-files += poly1305-core.S
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aflags-thumb2-$(CONFIG_THUMB2_KERNEL) := -U__thumb2__ -D__thumb2__=1
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# massage the perlasm code a bit so we only get the NEON routine if we need it
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poly1305-aflags-$(CONFIG_CPU_V7) := -U__LINUX_ARM_ARCH__ -D__LINUX_ARM_ARCH__=5
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poly1305-aflags-$(CONFIG_KERNEL_MODE_NEON) := -U__LINUX_ARM_ARCH__ -D__LINUX_ARM_ARCH__=7
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AFLAGS_poly1305-core.o += $(poly1305-aflags-y) $(aflags-thumb2-y)
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