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| author |   Eric Biggers <ebiggers@google.com> | 2019-03-12 22:12:47 -0700 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2019-03-22 20:57:27 +0800 |
| commit | b55e1a39543f5e9aadf1149f8ad4bcff5cace8a4 (patch) | |
| tree | 9f50f2eee2a2e57fe689f899ff572f097feab054 /crypto | |
| parent | crypto: arm64/gcm-aes-ce - fix no-NEON fallback code (diff) | |
| download | linux-dev-b55e1a39543f5e9aadf1149f8ad4bcff5cace8a4.tar.xz linux-dev-b55e1a39543f5e9aadf1149f8ad4bcff5cace8a4.zip | |
crypto: simd,testmgr - introduce crypto_simd_usable()
So that the no-SIMD fallback code can be tested by the crypto
self-tests, add a macro crypto_simd_usable() which wraps may_use_simd(),
but also returns false if the crypto self-tests have set a per-CPU bool
to disable SIMD in crypto code on the current CPU.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/testmgr.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 5d56b2990762..52417dde811f 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -37,6 +37,7 @@ #include <crypto/akcipher.h> #include <crypto/kpp.h> #include <crypto/acompress.h> +#include <crypto/internal/simd.h> #include "internal.h" @@ -52,6 +53,9 @@ MODULE_PARM_DESC(noextratests, "disable expensive crypto self-tests"); static unsigned int fuzz_iterations = 100; module_param(fuzz_iterations, uint, 0644); MODULE_PARM_DESC(fuzz_iterations, "number of fuzz test iterations"); + +DEFINE_PER_CPU(bool, crypto_simd_disabled_for_test); +EXPORT_PER_CPU_SYMBOL_GPL(crypto_simd_disabled_for_test); #endif #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS @@ -838,7 +842,27 @@ static void generate_random_testvec_config(struct testvec_config *cfg, WARN_ON_ONCE(!valid_testvec_config(cfg)); } -#endif /* CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */ + +static void crypto_disable_simd_for_test(void) +{ + preempt_disable(); + __this_cpu_write(crypto_simd_disabled_for_test, true); +} + +static void crypto_reenable_simd_for_test(void) +{ + __this_cpu_write(crypto_simd_disabled_for_test, false); + preempt_enable(); +} +#else /* !CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */ +static void crypto_disable_simd_for_test(void) +{ +} + +static void crypto_reenable_simd_for_test(void) +{ +} +#endif /* !CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */ static int check_nonfinal_hash_op(const char *op, int err, u8 *result, unsigned int digestsize, |