linux-kernel - [GIT PULL] Interleaved SHA-256 hashing support for 6.18

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Message-ID: <20250927202410.GC9798@quark>
Date: Sat, 27 Sep 2025 13:24:10 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: fsverity@...ts.linux.dev, linux-crypto@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Theodore Ts'o <tytso@....edu>, Ard Biesheuvel <ardb@...nel.org>,
	"Jason A. Donenfeld" <Jason@...c4.com>
Subject: [GIT PULL] Interleaved SHA-256 hashing support for 6.18

Note: this depends on the pull request
"[GIT PULL 03/12 for v6.18] inode" from Christian Brauner.

The following changes since commit f0883b9c395ecdf7e66a58b6027fd35056cf152c:

  Merge patch series "Move fscrypt and fsverity info out of struct inode" (2025-08-21 13:58:13 +0200)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/fs/fsverity/linux.git tags/fsverity-for-linus

for you to fetch changes up to a1f692fd69ccdbe1e492d366788b63227d429753:

  fsverity: Use 2-way interleaved SHA-256 hashing when supported (2025-09-17 13:10:04 -0500)

----------------------------------------------------------------

Add support for 2-way interleaved SHA-256 hashing to lib/crypto/, and
make fsverity use it for faster file data verification. This improves
fsverity performance on many x86_64 and arm64 processors.

Later, I plan to make dm-verity use this too.

----------------------------------------------------------------
Eric Biggers (6):
      lib/crypto: sha256: Add support for 2-way interleaved hashing
      lib/crypto: arm64/sha256: Add support for 2-way interleaved hashing
      lib/crypto: x86/sha256: Add support for 2-way interleaved hashing
      lib/crypto: tests: Add tests and benchmark for sha256_finup_2x()
      fsverity: Remove inode parameter from fsverity_hash_block()
      fsverity: Use 2-way interleaved SHA-256 hashing when supported

 fs/verity/enable.c              |  12 +-
 fs/verity/fsverity_private.h    |   2 +-
 fs/verity/hash_algs.c           |   3 +-
 fs/verity/verify.c              | 175 +++++++++++++++----
 include/crypto/sha2.h           |  28 +++
 lib/crypto/arm64/sha256-ce.S    | 284 ++++++++++++++++++++++++++++++-
 lib/crypto/arm64/sha256.h       |  37 ++++
 lib/crypto/sha256.c             |  71 +++++++-
 lib/crypto/tests/sha256_kunit.c | 184 ++++++++++++++++++++
 lib/crypto/x86/sha256-ni-asm.S  | 368 ++++++++++++++++++++++++++++++++++++++++
 lib/crypto/x86/sha256.h         |  39 +++++
 11 files changed, 1147 insertions(+), 56 deletions(-)