kernel/linux.git/lib/crypto/arm64, branch v6.19.11

lib/crypto: arm64: Move remaining algorithms to scoped ksimd API

2025-11-12T18:14:11+00:00

Move the arm64 implementations of SHA-3 and POLYVAL to the newly introduced scoped ksimd API, which replaces kernel_neon_begin() and kernel_neon_end(). On arm64, this is needed because the latter API will change in an incompatible manner. Signed-off-by: Ard Biesheuvel Signed-off-by: Eric Biggers

Merge tag 'scoped-ksimd-for-arm-arm64' into libcrypto-fpsimd-on-stack

2025-11-12T17:55:55+00:00

Pull scoped ksimd API for ARM and arm64 from Ard Biesheuvel: "Introduce a more strict replacement API for kernel_neon_begin()/kernel_neon_end() on both ARM and arm64, and replace occurrences of the latter pair appearing in lib/crypto" Signed-off-by: Eric Biggers

lib/crypto: Switch ARM and arm64 to 'ksimd' scoped guard API

2025-11-12T08:51:13+00:00

Before modifying the prototypes of kernel_neon_begin() and kernel_neon_end() to accommodate kernel mode FP/SIMD state buffers allocated on the stack, move arm64 to the new 'ksimd' scoped guard API, which encapsulates the calls to those functions. For symmetry, do the same for 32-bit ARM too. Reviewed-by: Eric Biggers Reviewed-by: Jonathan Cameron Acked-by: Catalin Marinas Signed-off-by: Ard Biesheuvel

lib/crypto: arm64/polyval: Migrate optimized code into library

2025-11-11T19:03:38+00:00

Migrate the arm64 implementation of POLYVAL into lib/crypto/, wiring it up to the POLYVAL library interface. This makes the POLYVAL library be properly optimized on arm64. This drops the arm64 optimizations of polyval in the crypto_shash API. That's fine, since polyval will be removed from crypto_shash entirely since it is unneeded there. But even if it comes back, the crypto_shash API could just be implemented on top of the library API, as usual. Adjust the names and prototypes of the assembly functions to align more closely with the rest of the library code. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20251109234726.638437-5-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: arm, arm64: Drop filenames from file comments

2025-11-06T04:30:51+00:00

Remove self-references to filenames from assembly files in lib/crypto/arm/ and lib/crypto/arm64/. This follows the recommended practice and eliminates an outdated reference to sha2-ce-core.S. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20251102014809.170713-1-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: arm64/sha3: Migrate optimized code into library

2025-11-06T04:02:35+00:00

Instead of exposing the arm64-optimized SHA-3 code via arm64-specific crypto_shash algorithms, instead just implement the sha3_absorb_blocks() and sha3_keccakf() library functions. This is much simpler, it makes the SHA-3 library functions be arm64-optimized, and it fixes the longstanding issue where the arm64-optimized SHA-3 code was disabled by default. SHA-3 still remains available through crypto_shash, but individual architectures no longer need to handle it. Note: to see the diff from arch/arm64/crypto/sha3-ce-glue.c to lib/crypto/arm64/sha3.h, view this commit with 'git show -M10'. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20251026055032.1413733-10-ebiggers@kernel.org Signed-off-by: Eric Biggers

Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux

2025-09-29T22:55:20+00:00

Pull interleaved SHA-256 hashing support from Eric Biggers: "Optimize fsverity with 2-way interleaved hashing Add support for 2-way interleaved SHA-256 hashing to lib/crypto/, and make fsverity use it for faster file data verification. This improves fsverity performance on many x86_64 and arm64 processors. Later, I plan to make dm-verity use this too" * tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux: fsverity: Use 2-way interleaved SHA-256 hashing when supported fsverity: Remove inode parameter from fsverity_hash_block() lib/crypto: tests: Add tests and benchmark for sha256_finup_2x() lib/crypto: x86/sha256: Add support for 2-way interleaved hashing lib/crypto: arm64/sha256: Add support for 2-way interleaved hashing lib/crypto: sha256: Add support for 2-way interleaved hashing

lib/crypto: arm64/sha256: Add support for 2-way interleaved hashing

2025-09-17T18:09:39+00:00

Add an implementation of sha256_finup_2x_arch() for arm64. It interleaves the computation of two SHA-256 hashes using the ARMv8 SHA-256 instructions. dm-verity and fs-verity will take advantage of this for greatly improved performance on capable CPUs. This increases the throughput of SHA-256 hashing 4096-byte messages by the following amounts on the following CPUs: ARM Cortex-X1: 70% ARM Cortex-X3: 68% ARM Cortex-A76: 65% ARM Cortex-A715: 43% ARM Cortex-A510: 25% ARM Cortex-A55: 8% Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250915160819.140019-3-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: chacha: Consolidate into single module

2025-08-29T16:50:19+00:00

Consolidate the ChaCha code into a single module (excluding chacha-block-generic.c which remains always built-in for random.c), similar to various other algorithms: - Each arch now provides a header file lib/crypto/$(SRCARCH)/chacha.h, replacing lib/crypto/$(SRCARCH)/chacha*.c. The header defines chacha_crypt_arch() and hchacha_block_arch(). It is included by lib/crypto/chacha.c, and thus the code gets built into the single libchacha module, with improved inlining in some cases. - Whether arch-optimized ChaCha is buildable is now controlled centrally by lib/crypto/Kconfig instead of by lib/crypto/$(SRCARCH)/Kconfig. The conditions for enabling it remain the same as before, and it remains enabled by default. - Any additional arch-specific translation units for the optimized ChaCha code, such as assembly files, are now compiled by lib/crypto/Makefile instead of lib/crypto/$(SRCARCH)/Makefile. This removes the last use for the Makefile and Kconfig files in the arm64, mips, powerpc, riscv, and s390 subdirectories of lib/crypto/. So also remove those files and the references to them. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250827151131.27733-7-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: chacha: Remove unused function chacha_is_arch_optimized()

2025-08-29T16:50:19+00:00

chacha_is_arch_optimized() is no longer used, so remove it. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250827151131.27733-4-ebiggers@kernel.org Signed-off-by: Eric Biggers