riscv/crc64: add Zbc optimized CRC64 functions

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 <bjorn@rivosinc.com> Acked-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20250216225530.306980-5-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
2026-10-31 05:15:34 +00:00 · 2025-02-16 14:55:30 -08:00 · 2025-02-16 14:55:30 -08:00 · 511484fa88
commit 511484fa88
parent 8bf3e17898
7 changed files with 112 additions and 1 deletions
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
--- a/arch/riscv/lib/Makefile
+++ b/arch/riscv/lib/Makefile
--- a/arch/riscv/lib/crc-clmul-consts.h
+++ b/arch/riscv/lib/crc-clmul-consts.h
--- a/arch/riscv/lib/crc-clmul.h
+++ b/arch/riscv/lib/crc-clmul.h
--- a/arch/riscv/lib/crc64.c
+++ b/arch/riscv/lib/crc64.c
--- a/arch/riscv/lib/crc64_lsb.c
+++ b/arch/riscv/lib/crc64_lsb.c
--- a/arch/riscv/lib/crc64_msb.c
+++ b/arch/riscv/lib/crc64_msb.c