diff options
| author | Samuel Neves <sneves@dei.uc.pt> | 2017-11-22 21:00:17 +0000 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2017-11-22 22:55:50 +0100 |
| commit | b1affbd12ed27bf0fb3c1500a38857b80dca94be (patch) | |
| tree | d7316834e0f8a4dfea0abfebd5a7be947729239a /src/crypto | |
| parent | fa8e7420316e82cfe59db4b4ce4f8f2876f64233 (diff) | |
poly1305-avx512: requires AVX512F+VL+BW
Signed-off-by: Samuel Neves <sneves@dei.uc.pt>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/crypto')
| -rw-r--r-- | src/crypto/chacha20poly1305.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/crypto/chacha20poly1305.c b/src/crypto/chacha20poly1305.c index 1de7a84..d419981 100644 --- a/src/crypto/chacha20poly1305.c +++ b/src/crypto/chacha20poly1305.c @@ -74,7 +74,12 @@ void __init chacha20poly1305_fpu_init(void) chacha20poly1305_use_avx = boot_cpu_has(X86_FEATURE_AVX) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL); chacha20poly1305_use_avx2 = boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL); #ifndef COMPAT_CANNOT_USE_AVX512 - chacha20poly1305_use_avx512 = boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_ZMM_Hi256, NULL); + /* ChaCha20 only needs AVX512F, but Poly1305 needs F+VL+BW. Since + * there's no hardware that actually supports one and not the other, + * we keep this as one flag. But should bizarre hardware ever be + * produced, we'll want to separate these out. + */ + chacha20poly1305_use_avx512 = boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) && boot_cpu_has(X86_FEATURE_AVX512VL) && boot_cpu_has(X86_FEATURE_AVX512BW) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_ZMM_Hi256, NULL); #endif } #elif defined(CONFIG_ARM) || defined(CONFIG_ARM64) |