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crypto: api - move crypto_simd_disabled_for_test to lib

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Move crypto_simd_disabled_for_test to lib/ so that crypto_simd_usable()
can be used by library code.

This was discussed previously
(https://lore.kernel.org/linux-crypto/20220716062920.210381-4-ebiggers@kernel.org/)
but was not done because there was no use case yet.  However, this is
now needed for the arm64 CRC32 library code.

Tested with:
    export ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
    echo CONFIG_CRC32=y > .config
    echo CONFIG_MODULES=y >> .config
    echo CONFIG_CRYPTO=m >> .config
    echo CONFIG_DEBUG_KERNEL=y >> .config
    echo CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=n >> .config
    echo CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y >> .config
    make olddefconfig
    make -j$(nproc)

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2024-10-18 16:53:43 -07:00 committed by Herbert Xu
parent 53d91ca76b
commit 4964a1d91c
3 changed files with 13 additions and 6 deletions
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6
crypto/algapi.c
View File

@ -6,7 +6,6 @@
*/
#include <crypto/algapi.h>
#include <crypto/internal/simd.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/fips.h>
@ -23,11 +22,6 @@
static LIST_HEAD(crypto_template_list);
#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
DEFINE_PER_CPU(bool, crypto_simd_disabled_for_test);
EXPORT_PER_CPU_SYMBOL_GPL(crypto_simd_disabled_for_test);
#endif
static inline void crypto_check_module_sig(struct module *mod)
{
if (fips_enabled && mod && !module_sig_ok(mod))

2
lib/crypto/Makefile
View File

@ -58,3 +58,5 @@ libcurve25519-y += curve25519-selftest.o
endif
obj-$(CONFIG_MPILIB) += mpi/
obj-$(CONFIG_CRYPTO_MANAGER_EXTRA_TESTS) += simd.o

11
lib/crypto/simd.c Normal file
View File

@ -0,0 +1,11 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SIMD testing utility functions
*
* Copyright 2024 Google LLC
*/
#include <crypto/internal/simd.h>
DEFINE_PER_CPU(bool, crypto_simd_disabled_for_test);
EXPORT_PER_CPU_SYMBOL_GPL(crypto_simd_disabled_for_test);