diff options
| author | Eric Biggers <ebiggers@kernel.org> | 2026-04-01 03:05:42 +0300 |
|---|---|---|
| committer | Eric Biggers <ebiggers@kernel.org> | 2026-04-01 23:02:10 +0300 |
| commit | d3a5cc5c9237cd6ffd1f84c1af306e315cf0cf3d (patch) | |
| tree | 39491ed4c661c3451f932546ded85f4ce7eb8103 | |
| parent | 63fcc765e1a30b7e04d395d7adc440443ae00338 (diff) | |
| download | linux-d3a5cc5c9237cd6ffd1f84c1af306e315cf0cf3d.tar.xz | |
lib/crypto: arm64/gf128hash: Remove obsolete chunking logic
Since commit aefbab8e77eb ("arm64: fpsimd: Preserve/restore kernel mode
NEON at context switch"), kernel-mode NEON sections have been
preemptible on arm64. And since commit 7dadeaa6e851 ("sched: Further
restrict the preemption modes"), voluntary preemption is no longer
supported on arm64 either. Therefore, there's no longer any need to
limit the length of kernel-mode NEON sections on arm64.
Simplify the GHASH and POLYVAL code accordingly.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260401000548.133151-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
| -rw-r--r-- | lib/crypto/arm64/gf128hash.h | 24 |
1 files changed, 4 insertions, 20 deletions
diff --git a/lib/crypto/arm64/gf128hash.h b/lib/crypto/arm64/gf128hash.h index b2c85585b758..1d1179f87f8d 100644 --- a/lib/crypto/arm64/gf128hash.h +++ b/lib/crypto/arm64/gf128hash.h @@ -89,16 +89,8 @@ static void ghash_blocks_arch(struct polyval_elem *acc, const u8 *data, size_t nblocks) { if (static_branch_likely(&have_asimd) && may_use_simd()) { - do { - /* Allow rescheduling every 4 KiB. */ - size_t n = min_t(size_t, nblocks, - 4096 / GHASH_BLOCK_SIZE); - - scoped_ksimd() - pmull_ghash_update_p8(n, acc, data, &key->h); - data += n * GHASH_BLOCK_SIZE; - nblocks -= n; - } while (nblocks); + scoped_ksimd() + pmull_ghash_update_p8(nblocks, acc, data, &key->h); } else { ghash_blocks_generic(acc, &key->h, data, nblocks); } @@ -110,16 +102,8 @@ static void polyval_blocks_arch(struct polyval_elem *acc, const u8 *data, size_t nblocks) { if (static_branch_likely(&have_pmull) && may_use_simd()) { - do { - /* Allow rescheduling every 4 KiB. */ - size_t n = min_t(size_t, nblocks, - 4096 / POLYVAL_BLOCK_SIZE); - - scoped_ksimd() - polyval_blocks_pmull(acc, key, data, n); - data += n * POLYVAL_BLOCK_SIZE; - nblocks -= n; - } while (nblocks); + scoped_ksimd() + polyval_blocks_pmull(acc, key, data, nblocks); } else { polyval_blocks_generic(acc, &key->h_powers[NUM_H_POWERS - 1], data, nblocks); |