forked from Qortal/Brooklyn
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <asm/cpufeature.h>
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#include <asm/processor.h>
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#include "curve25519-x86_64.c"
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static bool curve25519_use_bmi2_adx __ro_after_init;
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static bool *const curve25519_nobs[] __initconst = {
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&curve25519_use_bmi2_adx };
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static void __init curve25519_fpu_init(void)
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{
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curve25519_use_bmi2_adx = IS_ENABLED(CONFIG_AS_BMI2) &&
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IS_ENABLED(CONFIG_AS_ADX) &&
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boot_cpu_has(X86_FEATURE_BMI2) &&
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boot_cpu_has(X86_FEATURE_ADX);
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}
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static inline bool curve25519_arch(u8 mypublic[CURVE25519_KEY_SIZE],
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const u8 secret[CURVE25519_KEY_SIZE],
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const u8 basepoint[CURVE25519_KEY_SIZE])
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{
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if (IS_ENABLED(CONFIG_AS_ADX) && IS_ENABLED(CONFIG_AS_BMI2) &&
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curve25519_use_bmi2_adx) {
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curve25519_ever64(mypublic, secret, basepoint);
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return true;
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}
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return false;
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}
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static inline bool curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE],
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const u8 secret[CURVE25519_KEY_SIZE])
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{
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if (IS_ENABLED(CONFIG_AS_ADX) && IS_ENABLED(CONFIG_AS_BMI2) &&
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curve25519_use_bmi2_adx) {
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curve25519_ever64_base(pub, secret);
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return true;
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}
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return false;
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}
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