linux-kernel - [PATCH 0/3] Test CRC computation in interrupt contexts

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Message-ID: <20250811182631.376302-1-ebiggers@kernel.org>
Date: Mon, 11 Aug 2025 11:26:28 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-crypto@...r.kernel.org,
	Ard Biesheuvel <ardb@...nel.org>,
	linux-kselftest@...r.kernel.org,
	kunit-dev@...glegroups.com,
	Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH 0/3] Test CRC computation in interrupt contexts

This series updates crc_kunit to use the same interrupt context testing
strategy that I used in the crypto KUnit tests.  I.e., test CRC
computation in hardirq, softirq, and task context concurrently.  This
detect issues related to use of the FPU/SIMD/vector registers.

To allow lib/crc/tests/ and lib/crypto/tests/ to share code, move the
needed helper function to include/kunit/run-in-irq-context.h.
include/kunit/ seems like the most relevant location for this sort of
thing, but let me know if there is any other preference.

The third patch replaces the calls to crypto_simd_usable() in lib/crc/
with calls to the underlying functions, now that we have a better
solution that doesn't rely on the test injecting values.  (Note that
crc_kunit wasn't actually using the injection solution, anyway.)

I'd like to take this series via crc-next.

Eric Biggers (3):
  kunit, lib/crypto: Move run_irq_test() to common header
  lib/crc: crc_kunit: Test CRC computation in interrupt contexts
  lib/crc: Use underlying functions instead of crypto_simd_usable()

 include/kunit/run-in-irq-context.h    | 129 ++++++++++++++++++++++++++
 lib/crc/arm/crc-t10dif.h              |   6 +-
 lib/crc/arm/crc32.h                   |   6 +-
 lib/crc/arm64/crc-t10dif.h            |   6 +-
 lib/crc/arm64/crc32.h                 |  11 ++-
 lib/crc/powerpc/crc-t10dif.h          |   5 +-
 lib/crc/powerpc/crc32.h               |   5 +-
 lib/crc/tests/crc_kunit.c             |  62 +++++++++++--
 lib/crc/x86/crc-pclmul-template.h     |   3 +-
 lib/crc/x86/crc32.h                   |   2 +-
 lib/crypto/tests/hash-test-template.h | 123 +-----------------------
 11 files changed, 206 insertions(+), 152 deletions(-)
 create mode 100644 include/kunit/run-in-irq-context.h

base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
-- 
2.50.1