linux/arch/riscv/lib/Makefile, branch master

riscv: move the XOR code to lib/raid/

2026-04-03T06:36:19Z

Move the optimized XOR into lib/raid and include it it in xor.ko instead of always building it into the main kernel image. Link: https://lkml.kernel.org/r/20260327061704.3707577-17-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Eric Biggers Tested-by: Eric Biggers Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Andreas Larsson Cc: Anton Ivanov Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Chris Mason Cc: Christian Borntraeger Cc: Dan Williams Cc: David S. Miller Cc: David Sterba Cc: Heiko Carstens Cc: Herbert Xu Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: Jason A. Donenfeld Cc: Johannes Berg Cc: Li Nan Cc: Madhavan Srinivasan Cc: Magnus Lindholm Cc: Matt Turner Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Richard Henderson Cc: Richard Weinberger Cc: Russell King Cc: Song Liu Cc: Sven Schnelle Cc: Ted Ts'o Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton

Merge tag 'libcrypto-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

2025-07-29T00:58:52Z

Pull crypto library updates from Eric Biggers: "This is the main crypto library pull request for 6.17. The main focus this cycle is on reorganizing the SHA-1 and SHA-2 code, providing high-quality library APIs for SHA-1 and SHA-2 including HMAC support, and establishing conventions for lib/crypto/ going forward: - Migrate the SHA-1 and SHA-512 code (and also SHA-384 which shares most of the SHA-512 code) into lib/crypto/. This includes both the generic and architecture-optimized code. Greatly simplify how the architecture-optimized code is integrated. Add an easy-to-use library API for each SHA variant, including HMAC support. Finally, reimplement the crypto_shash support on top of the library API. - Apply the same reorganization to the SHA-256 code (and also SHA-224 which shares most of the SHA-256 code). This is a somewhat smaller change, due to my earlier work on SHA-256. But this brings in all the same additional improvements that I made for SHA-1 and SHA-512. There are also some smaller changes: - Move the architecture-optimized ChaCha, Poly1305, and BLAKE2s code from arch/$(SRCARCH)/lib/crypto/ to lib/crypto/$(SRCARCH)/. For these algorithms it's just a move, not a full reorganization yet. - Fix the MIPS chacha-core.S to build with the clang assembler. - Fix the Poly1305 functions to work in all contexts. - Fix a performance regression in the x86_64 Poly1305 code. - Clean up the x86_64 SHA-NI optimized SHA-1 assembly code. Note that since the new organization of the SHA code is much simpler, the diffstat of this pull request is negative, despite the addition of new fully-documented library APIs for multiple SHA and HMAC-SHA variants. These APIs will allow further simplifications across the kernel as users start using them instead of the old-school crypto API. (I've already written a lot of such conversion patches, removing over 1000 more lines of code. But most of those will target 6.18 or later)" * tag 'libcrypto-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (67 commits) lib/crypto: arm64/sha512-ce: Drop compatibility macros for older binutils lib/crypto: x86/sha1-ni: Convert to use rounds macros lib/crypto: x86/sha1-ni: Minor optimizations and cleanup crypto: sha1 - Remove sha1_base.h lib/crypto: x86/sha1: Migrate optimized code into library lib/crypto: sparc/sha1: Migrate optimized code into library lib/crypto: s390/sha1: Migrate optimized code into library lib/crypto: powerpc/sha1: Migrate optimized code into library lib/crypto: mips/sha1: Migrate optimized code into library lib/crypto: arm64/sha1: Migrate optimized code into library lib/crypto: arm/sha1: Migrate optimized code into library crypto: sha1 - Use same state format as legacy drivers crypto: sha1 - Wrap library and add HMAC support lib/crypto: sha1: Add HMAC support lib/crypto: sha1: Add SHA-1 library functions lib/crypto: sha1: Rename sha1_init() to sha1_init_raw() crypto: x86/sha1 - Rename conflicting symbol lib/crypto: sha2: Add hmac_sha*_init_usingrawkey() lib/crypto: arm/poly1305: Remove unneeded empty weak function lib/crypto: x86/poly1305: Fix performance regression on short messages ...

lib/crc: riscv: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57Z

Move the riscv-optimized CRC code from arch/riscv/lib/crc* into its new location in lib/crc/riscv/, and wire it up in the new way. This new way of organizing the CRC code eliminates the need to artificially split the code for each CRC variant into separate arch and generic modules, enabling better inlining and dead code elimination. For more details, see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/". Reviewed-by: "Martin K. Petersen" Acked-by: Ingo Molnar Acked-by: "Jason A. Donenfeld" Link: https://lore.kernel.org/r/20250607200454.73587-9-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: riscv: Move arch/riscv/lib/crypto/ into lib/crypto/

2025-06-30T16:26:20Z

Move the contents of arch/riscv/lib/crypto/ into lib/crypto/riscv/. 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 Acked-by: Palmer Dabbelt Reviewed-by: Martin K. Petersen Reviewed-by: Sohil Mehta Link: https://lore.kernel.org/r/20250619191908.134235-6-ebiggers@kernel.org Signed-off-by: Eric Biggers

crypto: riscv - move library functions to arch/riscv/lib/crypto/

2025-04-28T11:40:53Z

Continue disentangling the crypto library functions from the generic crypto infrastructure by moving the riscv ChaCha library functions into a new directory arch/riscv/lib/crypto/ that does not depend on CRYPTO. This mirrors the distinction between crypto/ and lib/crypto/. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

riscv/crc64: add Zbc optimized CRC64 functions

2025-03-10T16:29:27Z

Wire up crc64_be_arch() and crc64_nvme_arch() for 64-bit RISC-V using crc-clmul-template.h. This greatly improves the performance of these CRCs on Zbc-capable CPUs in 64-bit kernels. These optimized CRC64 functions are not yet supported in 32-bit kernels, since crc-clmul-template.h assumes that the CRC fits in an unsigned long. That implementation limitation could be addressed, but it would add a fair bit of complexity, so it has been omitted for now. Tested-by: Björn Töpel Acked-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20250216225530.306980-5-ebiggers@kernel.org Signed-off-by: Eric Biggers

riscv/crc-t10dif: add Zbc optimized CRC-T10DIF function

2025-03-10T16:29:25Z

Wire up crc_t10dif_arch() for RISC-V using crc-clmul-template.h. This greatly improves CRC-T10DIF performance on Zbc-capable CPUs. Tested-by: Björn Töpel Acked-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20250216225530.306980-4-ebiggers@kernel.org Signed-off-by: Eric Biggers

riscv/crc32: reimplement the CRC32 functions using new template

2025-03-10T16:29:22Z

Delete the previous Zbc optimized CRC32 code, and re-implement it using the new template. The new implementation is more optimized and shares more code among CRC variants. Tested-by: Björn Töpel Acked-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20250216225530.306980-3-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crc32: improve support for arch-specific overrides

2024-12-02T01:23:01Z

Currently the CRC32 library functions are defined as weak symbols, and the arm64 and riscv architectures override them. This method of arch-specific overrides has the limitation that it only works when both the base and arch code is built-in. Also, it makes the arch-specific code be silently not used if it is accidentally built with lib-y instead of obj-y; unfortunately the RISC-V code does this. This commit reorganizes the code to have explicit *_arch() functions that are called when they are enabled, similar to how some of the crypto library code works (e.g. chacha_crypt() calls chacha_crypt_arch()). Make the existing kconfig choice for the CRC32 implementation also control whether the arch-optimized implementation (if one is available) is enabled or not. Make it enabled by default if CRC32 is also enabled. The result is that arch-optimized CRC32 library functions will be included automatically when appropriate, but it is now possible to disable them. They can also now be built as a loadable module if the CRC32 library functions happen to be used only by loadable modules, in which case the arch and base CRC32 modules will be automatically loaded via direct symbol dependency when appropriate. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20241202010844.144356-3-ebiggers@kernel.org Signed-off-by: Eric Biggers

riscv: Omit optimized string routines when using KASAN

2024-09-19T08:10:00Z

The optimized string routines are implemented in assembly, so they are not instrumented for use with KASAN. Fall back to the C version of the routines in order to improve KASAN coverage. This fixes the kasan_strings() unit test. Signed-off-by: Samuel Holland Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20240801033725.28816-2-samuel.holland@sifive.com Signed-off-by: Palmer Dabbelt