From 07dac52be6336be4a77a399fd7928802711fb77f Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 28 Aug 2018 23:50:35 -0600 Subject: crypto: import zinc Signed-off-by: Jason A. Donenfeld --- src/crypto/zinc/poly1305/poly1305-arm-glue.h | 69 ++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 src/crypto/zinc/poly1305/poly1305-arm-glue.h (limited to 'src/crypto/zinc/poly1305/poly1305-arm-glue.h') diff --git a/src/crypto/zinc/poly1305/poly1305-arm-glue.h b/src/crypto/zinc/poly1305/poly1305-arm-glue.h new file mode 100644 index 0000000..53f8fec --- /dev/null +++ b/src/crypto/zinc/poly1305/poly1305-arm-glue.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld . All Rights Reserved. + */ + +#include +#include +#include + +asmlinkage void poly1305_init_arm(void *ctx, const u8 key[16]); +asmlinkage void poly1305_blocks_arm(void *ctx, const u8 *inp, const size_t len, + const u32 padbit); +asmlinkage void poly1305_emit_arm(void *ctx, u8 mac[16], const u32 nonce[4]); +#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && \ + (defined(CONFIG_64BIT) || __LINUX_ARM_ARCH__ >= 7) +#define ARM_USE_NEON +asmlinkage void poly1305_blocks_neon(void *ctx, const u8 *inp, const size_t len, + const u32 padbit); +asmlinkage void poly1305_emit_neon(void *ctx, u8 mac[16], const u32 nonce[4]); +#endif + +static bool poly1305_use_neon __ro_after_init; + +void __init poly1305_fpu_init(void) +{ +#if defined(CONFIG_ARM64) + poly1305_use_neon = elf_hwcap & HWCAP_ASIMD; +#elif defined(CONFIG_ARM) + poly1305_use_neon = elf_hwcap & HWCAP_NEON; +#endif +} + +static inline bool poly1305_init_arch(void *ctx, + const u8 key[POLY1305_KEY_SIZE], + simd_context_t simd_context) +{ + poly1305_init_arm(ctx, key); + return true; +} + +static inline bool poly1305_blocks_arch(void *ctx, const u8 *inp, + const size_t len, const u32 padbit, + simd_context_t simd_context) +{ +#if defined(ARM_USE_NEON) + if (simd_context == HAVE_FULL_SIMD && poly1305_use_neon) { + poly1305_blocks_neon(ctx, inp, len, padbit); + return true; + } +#endif + poly1305_blocks_arm(ctx, inp, len, padbit); + return true; +} + +static inline bool poly1305_emit_arch(void *ctx, u8 mac[POLY1305_MAC_SIZE], + const u32 nonce[4], + simd_context_t simd_context) +{ +#if defined(ARM_USE_NEON) + if (simd_context == HAVE_FULL_SIMD && poly1305_use_neon) { + poly1305_emit_neon(ctx, mac, nonce); + return true; + } +#endif + poly1305_emit_arm(ctx, mac, nonce); + return true; +} + +#define HAVE_POLY1305_ARCH_IMPLEMENTATION -- cgit v1.2.3