Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.19.12 2025-11-19T16:19:28+00:00 2025-11-19T16:19:28+00:00 Chunyan Zhang zhangchunyan@iscas.ac.cn 2025-11-18T04:19:25+00:00 urn:sha1:3c58d7a51341fa032eda45d8b9904dbfae120ef5 To support userspace raid6test, this patch adds __KERNEL__ ifdef for kernel header inclusions also userspace wrapper definitions to allow code to be compiled in userspace. This patch also drops the NSIZE macro, instead of using the vector length, which can work for both kernel and user space. Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Signed-off-by: Chunyan Zhang <zhangchunyan@iscas.ac.cn> Link: https://patch.msgid.link/20250718072711.3865118-5-zhangchunyan@iscas.ac.cn Signed-off-by: Paul Walmsley <pjw@kernel.org> 2025-06-05T21:03:07+00:00 Chunyan Zhang zhangchunyan@iscas.ac.cn 2025-03-05T08:37:06+00:00 urn:sha1:6093faaf9593fca92f96f165c95ff4b53353b1f4 The assembly is originally based on the ARM NEON and int.uc, but uses RISC-V vector instructions to implement the RAID6 syndrome and recovery calculations. The functions are tested on QEMU running with the option "-icount shift=0": raid6: rvvx1 gen() 1008 MB/s raid6: rvvx2 gen() 1395 MB/s raid6: rvvx4 gen() 1584 MB/s raid6: rvvx8 gen() 1694 MB/s raid6: int64x8 gen() 113 MB/s raid6: int64x4 gen() 116 MB/s raid6: int64x2 gen() 272 MB/s raid6: int64x1 gen() 229 MB/s raid6: using algorithm rvvx8 gen() 1694 MB/s raid6: .... xor() 1000 MB/s, rmw enabled raid6: using rvv recovery algorithm [Charlie: - Fixup vector options] Signed-off-by: Charlie Jenkins <charlie@rivosinc.com> Signed-off-by: Chunyan Zhang <zhangchunyan@iscas.ac.cn> Reviewed-by: Charlie Jenkins <charlie@rivosinc.com> Tested-by: Charlie Jenkins <charlie@rivosinc.com> Link: https://lore.kernel.org/r/20250305083707.74218-1-zhangchunyan@iscas.ac.cn Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>