diff options
Diffstat (limited to 'src/crypto/zinc/curve25519/curve25519-x86_64-glue.c')
-rw-r--r-- | src/crypto/zinc/curve25519/curve25519-x86_64-glue.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/crypto/zinc/curve25519/curve25519-x86_64-glue.c b/src/crypto/zinc/curve25519/curve25519-x86_64-glue.c new file mode 100644 index 0000000..34ff1d8 --- /dev/null +++ b/src/crypto/zinc/curve25519/curve25519-x86_64-glue.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <asm/cpufeature.h> +#include <asm/processor.h> + +#include "curve25519-x86_64.h" + +static bool curve25519_use_bmi2 __ro_after_init; +static bool curve25519_use_adx __ro_after_init; + +static void __init curve25519_fpu_init(void) +{ + curve25519_use_bmi2 = boot_cpu_has(X86_FEATURE_BMI2); + curve25519_use_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 (curve25519_use_adx) { + curve25519_adx(mypublic, secret, basepoint); + return true; + } else if (curve25519_use_bmi2) { + curve25519_bmi2(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 (curve25519_use_adx) { + curve25519_adx_base(pub, secret); + return true; + } else if (curve25519_use_bmi2) { + curve25519_bmi2_base(pub, secret); + return true; + } + return false; +} |