linux/lib/crypto/powerpc, branch v6.17

lib/crypto: powerpc/sha1: Migrate optimized code into library

2025-07-14T18:11:49Z

Instead of exposing the powerpc-optimized SHA-1 code via powerpc-specific crypto_shash algorithms, instead just implement the sha1_blocks() library function. This is much simpler, it makes the SHA-1 library functions be powerpc-optimized, and it fixes the longstanding issue where the powerpc-optimized SHA-1 code was disabled by default. SHA-1 still remains available through crypto_shash, but individual architectures no longer need to handle it. Note: to see the diff from arch/powerpc/crypto/sha1-spe-glue.c to lib/crypto/powerpc/sha1.h, view this commit with 'git show -M10'. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250712232329.818226-11-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: sha256: Consolidate into single module

2025-07-04T17:23:11Z

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 Link: https://lore.kernel.org/r/20250630160645.3198-13-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: sha256: Remove sha256_is_arch_optimized()

2025-07-04T17:23:11Z

Remove sha256_is_arch_optimized(), since it is no longer used. Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250630160645.3198-12-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: sha256: Propagate sha256_block_state type to implementations

2025-07-04T17:22:57Z

The previous commit made the SHA-256 compression function state be strongly typed, but it wasn't propagated all the way down to the implementations of it. Do that now. Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250630160645.3198-8-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: powerpc: Move arch/powerpc/lib/crypto/ into lib/crypto/

2025-06-30T16:26:20Z

Move the contents of arch/powerpc/lib/crypto/ into lib/crypto/powerpc/. The new code organization makes a lot more sense for how this code actually works and is developed. In particular, it makes it possible to build each algorithm as a single module, with better inlining and dead code elimination. For a more detailed explanation, see the patchset which did this for the CRC library code: https://lore.kernel.org/r/20250607200454.73587-1-ebiggers@kernel.org/. Also see the patchset which did this for SHA-512: https://lore.kernel.org/linux-crypto/20250616014019.415791-1-ebiggers@kernel.org/ This is just a preparatory commit, which does the move to get the files into their new location but keeps them building the same way as before. Later commits will make the actual improvements to the way the arch-optimized code is integrated for each algorithm. Acked-by: Ard Biesheuvel Reviewed-by: Martin K. Petersen Reviewed-by: Sohil Mehta Link: https://lore.kernel.org/r/20250619191908.134235-5-ebiggers@kernel.org Signed-off-by: Eric Biggers