8000 Disable CRYPTO_is_AVX512IFMA_capable by justsmth · Pull Request #1858 · aws/aws-lc · GitHub
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Disable CRYPTO_is_AVX512IFMA_capable #1858

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Merged
merged 2 commits into from
Sep 19, 2024
Merged

Disable CRYPTO_is_AVX512IFMA_capable #1858

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5e504f7
Fix CRYPTO_is_AVX512IFMA_capable
justsmth Sep 17, 2024
9cff9f8
Also check AVX512BW bit
justsmth Sep 18, 2024
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15 changes: 13 additions & 2 deletions crypto/fipsmodule/cpucap/internal.h
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Original file line number Diff line number Diff line change
Expand Up @@ -119,8 +119,12 @@ OPENSSL_INLINE int CRYPTO_is_SHAEXT_capable(void) {
return (OPENSSL_ia32cap_get()[2] & (1 << 29)) != 0;
}

// AVX512VL | AVX512BW | AVX512DQ | AVX512F
// 1u << 31 | 1u << 30 | 1u << 17 | 1u << 16
// 1100_0000_0000_0011_0000_0000_0000_0000
#define CPU_CAP_AVX512_BITFLAGS 0xC0030000
OPENSSL_INLINE int CRYPTO_is_AVX512_capable(void) {
return (OPENSSL_ia32cap_get()[2] & 0xC0030000) == 0xC0030000;
return (OPENSSL_ia32cap_get()[2] & CPU_CAP_AVX512_BITFLAGS) == CPU_CAP_AVX512_BITFLAGS;
}

OPENSSL_INLINE int CRYPTO_is_VAES_capable(void) {
Expand All @@ -131,8 +135,15 @@ OPENSSL_INLINE int CRYPTO_is_VPCLMULQDQ_capable(void) {
return (OPENSSL_ia32cap_get()[3] & (1u << (42 - 32))) != 0;
}

// AVX512VL | AVX512BW | AVX512_IFMA | AVX512DQ | AVX512F
// 1u << 31 | 1u << 30 | 1u << 21 | 1u << 17 | 1u << 16
// 1100_0000_0010_0011_0000_0000_0000_0000
#define CPU_CAP_AVX512IFMA_BITFLAGS 0xC0230000
OPENSSL_INLINE int CRYPTO_is_AVX512IFMA_capable(void) {
return (OPENSSL_ia32cap_get()[3] & (1u << 31 | 1u << 21 |1u << 17 | 1u << 16)) != 0;
return 0;
// TODO: Re-enable once we understand Windows test failures.
// return (OPENSSL_ia32cap_get()[2] & CPU_CAP_AVX512IFMA_BITFLAGS) ==
// CPU_CAP_AVX512IFMA_BITFLAGS;
}

OPENSSL_INLINE int CRYPTO_is_VBMI2_capable(void) {
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