diff options
Diffstat (limited to 'src/crypto/zinc/chacha20/chacha20-arm-glue.h')
| -rw-r--r-- | src/crypto/zinc/chacha20/chacha20-arm-glue.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/crypto/zinc/chacha20/chacha20-arm-glue.h b/src/crypto/zinc/chacha20/chacha20-arm-glue.h new file mode 100644 index 0000000..d323615 --- /dev/null +++ b/src/crypto/zinc/chacha20/chacha20-arm-glue.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <zinc/chacha20.h> +#include <asm/hwcap.h> +#include <asm/neon.h> + +asmlinkage void chacha20_arm(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && \ + (defined(CONFIG_64BIT) || __LINUX_ARM_ARCH__ >= 7) +#define ARM_USE_NEON +asmlinkage void chacha20_neon(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +#endif + +static bool chacha20_use_neon __ro_after_init; + +void __init chacha20_fpu_init(void) +{ +#if defined(CONFIG_ARM64) + chacha20_use_neon = elf_hwcap & HWCAP_ASIMD; +#elif defined(CONFIG_ARM) + chacha20_use_neon = elf_hwcap & HWCAP_NEON; +#endif +} + +static inline bool chacha20_arch(u8 *dst, const u8 *src, const size_t len, + const u32 key[8], const u32 counter[4], + simd_context_t simd_context) +{ +#if defined(ARM_USE_NEON) + if (simd_context == HAVE_FULL_SIMD && chacha20_use_neon) { + chacha20_neon(dst, src, len, key, counter); + return true; + } +#endif + chacha20_arm(dst, src, len, key, counter); + return true; +} + +static inline bool hchacha20_arch(u8 *derived_key, const u8 *nonce, + const u8 *key, simd_context_t simd_context) +{ + return false; +} + +#define HAVE_CHACHA20_ARCH_IMPLEMENTATION |