blob: e08cc2ba74f3f68d043ec7e4006dae57531d7936 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include <asm/cpufeature.h>
#include <asm/processor.h>
#include "curve25519-x86_64.c"
static bool curve25519_use_bmi2_adx __ro_after_init;
static bool *const curve25519_nobs[] __initconst = {
&curve25519_use_bmi2_adx };
static void __init curve25519_fpu_init(void)
{
curve25519_use_bmi2_adx = IS_ENABLED(CONFIG_AS_BMI2) &&
IS_ENABLED(CONFIG_AS_ADX) &&
boot_cpu_has(X86_FEATURE_BMI2) &&
boot_cpu_has(X86_FEATURE_ADX);
}
static inline bool curve25519_arch(u8 mypublic[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE],
const u8 basepoint[CURVE25519_KEY_SIZE])
{
if (IS_ENABLED(CONFIG_AS_ADX) && IS_ENABLED(CONFIG_AS_BMI2) &&
curve25519_use_bmi2_adx) {
curve25519_ever64(mypublic, secret, basepoint);
return true;
}
return false;
}
static inline bool curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE])
{
if (IS_ENABLED(CONFIG_AS_ADX) && IS_ENABLED(CONFIG_AS_BMI2) &&
curve25519_use_bmi2_adx) {
curve25519_ever64_base(pub, secret);
return true;
}
return false;
}