diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-08-28 23:50:35 -0600 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-09-03 23:52:11 -0600 |
| commit | 07dac52be6336be4a77a399fd7928802711fb77f (patch) | |
| tree | ce42d6b1924ad4a67145d6f43ab3b5fcfba2031f /src/crypto/zinc/poly1305/poly1305-x86_64-glue.h | |
| parent | 6a4e34f63be70ea96851e593172e0d3773086219 (diff) | |
crypto: import zinc
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/crypto/zinc/poly1305/poly1305-x86_64-glue.h')
| -rw-r--r-- | src/crypto/zinc/poly1305/poly1305-x86_64-glue.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/crypto/zinc/poly1305/poly1305-x86_64-glue.h b/src/crypto/zinc/poly1305/poly1305-x86_64-glue.h new file mode 100644 index 0000000..e24bee7 --- /dev/null +++ b/src/crypto/zinc/poly1305/poly1305-x86_64-glue.h @@ -0,0 +1,111 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <zinc/poly1305.h> +#include <asm/cpufeature.h> +#include <asm/processor.h> +#include <asm/intel-family.h> + +asmlinkage void poly1305_init_x86_64(void *ctx, + const u8 key[POLY1305_KEY_SIZE]); +asmlinkage void poly1305_blocks_x86_64(void *ctx, const u8 *inp, + const size_t len, const u32 padbit); +asmlinkage void poly1305_emit_x86_64(void *ctx, u8 mac[POLY1305_MAC_SIZE], + const u32 nonce[4]); +#ifdef CONFIG_AS_AVX +asmlinkage void poly1305_emit_avx(void *ctx, u8 mac[POLY1305_MAC_SIZE], + const u32 nonce[4]); +asmlinkage void poly1305_blocks_avx(void *ctx, const u8 *inp, const size_t len, + const u32 padbit); +#endif +#ifdef CONFIG_AS_AVX2 +asmlinkage void poly1305_blocks_avx2(void *ctx, const u8 *inp, const size_t len, + const u32 padbit); +#endif +#ifdef CONFIG_AS_AVX512 +asmlinkage void poly1305_blocks_avx512(void *ctx, const u8 *inp, + const size_t len, const u32 padbit); +#endif + +static bool poly1305_use_avx __ro_after_init; +static bool poly1305_use_avx2 __ro_after_init; +static bool poly1305_use_avx512 __ro_after_init; + +void __init poly1305_fpu_init(void) +{ + poly1305_use_avx = + boot_cpu_has(X86_FEATURE_AVX) && + cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL); + poly1305_use_avx2 = + boot_cpu_has(X86_FEATURE_AVX) && + boot_cpu_has(X86_FEATURE_AVX2) && + cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL); +#ifndef COMPAT_CANNOT_USE_AVX512 + poly1305_use_avx512 = + boot_cpu_has(X86_FEATURE_AVX) && + boot_cpu_has(X86_FEATURE_AVX2) && + boot_cpu_has(X86_FEATURE_AVX512F) && + cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | + XFEATURE_MASK_AVX512, NULL) && + /* Skylake downclocks unacceptably much when using zmm. */ + boot_cpu_data.x86_model != INTEL_FAM6_SKYLAKE_X; +#endif +} + +static inline bool poly1305_init_arch(void *ctx, + const u8 key[POLY1305_KEY_SIZE], + simd_context_t simd_context) +{ + poly1305_init_x86_64(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) +{ +#ifdef CONFIG_AS_AVX512 + if (poly1305_use_avx512 && simd_context == HAVE_FULL_SIMD) + poly1305_blocks_avx512(ctx, inp, len, padbit); + else +#endif +#ifdef CONFIG_AS_AVX2 + if (poly1305_use_avx2 && simd_context == HAVE_FULL_SIMD) + poly1305_blocks_avx2(ctx, inp, len, padbit); + else +#endif +#ifdef CONFIG_AS_AVX + if (poly1305_use_avx && simd_context == HAVE_FULL_SIMD) + poly1305_blocks_avx(ctx, inp, len, padbit); + else +#endif + poly1305_blocks_x86_64(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) +{ +#ifdef CONFIG_AS_AVX512 + if (poly1305_use_avx512 && simd_context == HAVE_FULL_SIMD) + poly1305_emit_avx(ctx, mac, nonce); + else +#endif +#ifdef CONFIG_AS_AVX2 + if (poly1305_use_avx2 && simd_context == HAVE_FULL_SIMD) + poly1305_emit_avx(ctx, mac, nonce); + else +#endif +#ifdef CONFIG_AS_AVX + if (poly1305_use_avx && simd_context == HAVE_FULL_SIMD) + poly1305_emit_avx(ctx, mac, nonce); + else +#endif + poly1305_emit_x86_64(ctx, mac, nonce); + return true; +} + +#define HAVE_POLY1305_ARCH_IMPLEMENTATION |