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crypto: sha256_ssse3 - also test for BMI2

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The AVX2 implementation also uses BMI2 instructions,
but doesn't test for their availability. The assumption
that AVX2 and BMI2 always go together is false. Some
Haswells have AVX2 but not BMI2.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Oliver Neukum 2013-10-01 14:34:46 +02:00 committed by Herbert Xu
parent 165c70f07f
commit 16c0c4e165
1 changed files with 1 additions and 1 deletions
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arch/x86/crypto/sha256_ssse3_glue.c
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@ -281,7 +281,7 @@ static int __init sha256_ssse3_mod_init(void)
/* allow AVX to override SSSE3, it's a little faster */
if (avx_usable()) {
#ifdef CONFIG_AS_AVX2
if (boot_cpu_has(X86_FEATURE_AVX2))
if (boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_BMI2))
sha256_transform_asm = sha256_transform_rorx;
else
#endif