diff options
Diffstat (limited to 'src/crypto/zinc/curve25519/curve25519-arm-glue.c')
| -rw-r--r-- | src/crypto/zinc/curve25519/curve25519-arm-glue.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/crypto/zinc/curve25519/curve25519-arm-glue.c b/src/crypto/zinc/curve25519/curve25519-arm-glue.c new file mode 100644 index 0000000..cea06f3 --- /dev/null +++ b/src/crypto/zinc/curve25519/curve25519-arm-glue.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <linux/simd.h> +#include <asm/hwcap.h> +#include <asm/neon.h> + +asmlinkage void curve25519_neon(u8 mypublic[CURVE25519_KEY_SIZE], + const u8 secret[CURVE25519_KEY_SIZE], + const u8 basepoint[CURVE25519_KEY_SIZE]); + +static bool curve25519_use_neon __ro_after_init; + +static void __init curve25519_fpu_init(void) +{ + curve25519_use_neon = elf_hwcap & HWCAP_NEON; +} + +static inline bool curve25519_arch(u8 mypublic[CURVE25519_KEY_SIZE], + const u8 secret[CURVE25519_KEY_SIZE], + const u8 basepoint[CURVE25519_KEY_SIZE]) +{ + simd_context_t simd_context; + bool used_arch = false; + + simd_get(&simd_context); + if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && + !IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && curve25519_use_neon && + simd_use(&simd_context)) { + curve25519_neon(mypublic, secret, basepoint); + used_arch = true; + } + simd_put(&simd_context); + return used_arch; +} + +static inline bool curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE], + const u8 secret[CURVE25519_KEY_SIZE]) +{ + return false; +} |