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| author |   Chunyan Zhang <zhangchunyan@iscas.ac.cn> | 2025-03-05 16:37:06 +0800 |
|---|---|---|
| committer |   Palmer Dabbelt <palmer@dabbelt.com> | 2025-06-05 14:03:07 -0700 |
| commit | 6093faaf9593fca92f96f165c95ff4b53353b1f4 (patch) | |
| tree | 6ad368038e4c7657fbde3cc61e732db5a4e909b4 /include | |
| parent | riscv: mm: Add support for Svinval extension (diff) | |
| download | linux-rng-6093faaf9593fca92f96f165c95ff4b53353b1f4.tar.xz linux-rng-6093faaf9593fca92f96f165c95ff4b53353b1f4.zip | |
raid6: Add RISC-V SIMD syndrome and recovery calculations
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/raid/pq.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/raid/pq.h b/include/linux/raid/pq.h index 98030accf641..72ff44cca864 100644 --- a/include/linux/raid/pq.h +++ b/include/linux/raid/pq.h @@ -108,6 +108,10 @@ extern const struct raid6_calls raid6_vpermxor4; extern const struct raid6_calls raid6_vpermxor8; extern const struct raid6_calls raid6_lsx; extern const struct raid6_calls raid6_lasx; +extern const struct raid6_calls raid6_rvvx1; +extern const struct raid6_calls raid6_rvvx2; +extern const struct raid6_calls raid6_rvvx4; +extern const struct raid6_calls raid6_rvvx8; struct raid6_recov_calls { void (*data2)(int, size_t, int, int, void **); @@ -125,6 +129,7 @@ extern const struct raid6_recov_calls raid6_recov_s390xc; extern const struct raid6_recov_calls raid6_recov_neon; extern const struct raid6_recov_calls raid6_recov_lsx; extern const struct raid6_recov_calls raid6_recov_lasx; +extern const struct raid6_recov_calls raid6_recov_rvv; extern const struct raid6_calls raid6_neonx1; extern const struct raid6_calls raid6_neonx2; |