From ad5e42105059b23545b6958b3d8d4a65e7c78f01 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Fri, 5 Oct 2018 23:20:40 +0200 Subject: global: rename include'd C files to be .c This is done by 259 other files in the kernel tree: linux $ rg '#include.*\.c' -l | wc -l 259 Suggested-by: Sultan Alsawaf --- src/crypto/zinc/chacha20/chacha20-x86_64-glue.c | 102 ++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 src/crypto/zinc/chacha20/chacha20-x86_64-glue.c (limited to 'src/crypto/zinc/chacha20/chacha20-x86_64-glue.c') diff --git a/src/crypto/zinc/chacha20/chacha20-x86_64-glue.c b/src/crypto/zinc/chacha20/chacha20-x86_64-glue.c new file mode 100644 index 0000000..b89d5e1 --- /dev/null +++ b/src/crypto/zinc/chacha20/chacha20-x86_64-glue.c @@ -0,0 +1,102 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2018 Jason A. Donenfeld . All Rights Reserved. + */ + +#include +#include +#include +#include + +asmlinkage void hchacha20_ssse3(u32 *derived_key, const u8 *nonce, + const u8 *key); +asmlinkage void chacha20_ssse3(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +asmlinkage void chacha20_avx2(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +asmlinkage void chacha20_avx512(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +asmlinkage void chacha20_avx512vl(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); + +static bool chacha20_use_ssse3 __ro_after_init; +static bool chacha20_use_avx2 __ro_after_init; +static bool chacha20_use_avx512 __ro_after_init; +static bool chacha20_use_avx512vl __ro_after_init; + +static void __init chacha20_fpu_init(void) +{ + chacha20_use_ssse3 = boot_cpu_has(X86_FEATURE_SSSE3); + chacha20_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 + chacha20_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; + chacha20_use_avx512vl = + boot_cpu_has(X86_FEATURE_AVX) && + boot_cpu_has(X86_FEATURE_AVX2) && + boot_cpu_has(X86_FEATURE_AVX512F) && + boot_cpu_has(X86_FEATURE_AVX512VL) && + cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | + XFEATURE_MASK_AVX512, NULL); +#endif +} + +static inline bool chacha20_arch(struct chacha20_ctx *ctx, u8 *dst, + const u8 *src, size_t len, + simd_context_t *simd_context) +{ + /* SIMD disables preemption, so relax after processing each page. */ + BUILD_BUG_ON(PAGE_SIZE < CHACHA20_BLOCK_SIZE || + PAGE_SIZE % CHACHA20_BLOCK_SIZE); + + if (!IS_ENABLED(CONFIG_AS_SSSE3) || !chacha20_use_ssse3 || + len <= CHACHA20_BLOCK_SIZE || !simd_use(simd_context)) + return false; + + for (;;) { + const size_t bytes = min_t(size_t, len, PAGE_SIZE); + + if (IS_ENABLED(CONFIG_AS_AVX512) && chacha20_use_avx512 && + len >= CHACHA20_BLOCK_SIZE * 8) + chacha20_avx512(dst, src, bytes, ctx->key, ctx->counter); + else if (IS_ENABLED(CONFIG_AS_AVX512) && chacha20_use_avx512vl && + len >= CHACHA20_BLOCK_SIZE * 4) + chacha20_avx512vl(dst, src, bytes, ctx->key, ctx->counter); + else if (IS_ENABLED(CONFIG_AS_AVX2) && chacha20_use_avx2 && + len >= CHACHA20_BLOCK_SIZE * 4) + chacha20_avx2(dst, src, bytes, ctx->key, ctx->counter); + else + chacha20_ssse3(dst, src, bytes, ctx->key, ctx->counter); + ctx->counter[0] += (bytes + 63) / 64; + len -= bytes; + if (!len) + break; + dst += bytes; + src += bytes; + simd_relax(simd_context); + } + + return true; +} + +static inline bool hchacha20_arch(u32 derived_key[CHACHA20_KEY_WORDS], + const u8 nonce[HCHACHA20_NONCE_SIZE], + const u8 key[HCHACHA20_KEY_SIZE], + simd_context_t *simd_context) +{ + if (IS_ENABLED(CONFIG_AS_SSSE3) && chacha20_use_ssse3 && + simd_use(simd_context)) { + hchacha20_ssse3(derived_key, nonce, key); + return true; + } + return false; +} -- cgit v1.2.3-59-g8ed1b