1 files changed, 72 insertions, 0 deletions
diff --git a/src/crypto/zinc/blake2s/blake2s-x86_64-glue.c b/src/crypto/zinc/blake2s/blake2s-x86_64-glue.c
new file mode 100644
index 0000000..7be9809
--- /dev/null
+++ b/src/crypto/zinc/blake2s/blake2s-x86_64-glue.c
@@ -0,0 +1,72 @@
+// 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/cpufeature.h>
+#include <asm/processor.h>
+#include <asm/fpu/api.h>
+
+asmlinkage void blake2s_compress_avx(struct blake2s_state *state,
+				     const u8 *block, const size_t nblocks,
+				     const u32 inc);
+asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
+					const u8 *block, const size_t nblocks,
+					const u32 inc);
+
+static bool blake2s_use_avx __ro_after_init;
+static bool blake2s_use_avx512 __ro_after_init;
+
+static void __init blake2s_fpu_init(void)
+{
+	blake2s_use_avx =
+		boot_cpu_has(X86_FEATURE_AVX) &&
+		cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
+#ifndef COMPAT_CANNOT_USE_AVX512
+	blake2s_use_avx512 =
+		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 blake2s_compress_arch(struct blake2s_state *state,
+					 const u8 *block, size_t nblocks,
+					 const u32 inc)
+{
+	simd_context_t simd_context;
+	bool used_arch = false;
+
+	/* SIMD disables preemption, so relax after processing each page. */
+	BUILD_BUG_ON(PAGE_SIZE / BLAKE2S_BLOCK_SIZE < 8);
+
+	simd_get(&simd_context);
+
+	if (!IS_ENABLED(CONFIG_AS_AVX) || !blake2s_use_avx ||
+	    !simd_use(&simd_context))
+		goto out;
+	used_arch = true;
+
+	for (;;) {
+		const size_t blocks = min_t(size_t, nblocks,
+					    PAGE_SIZE / BLAKE2S_BLOCK_SIZE);
+
+		if (IS_ENABLED(CONFIG_AS_AVX512) && blake2s_use_avx512)
+			blake2s_compress_avx512(state, block, blocks, inc);
+		else
+			blake2s_compress_avx(state, block, blocks, inc);
+
+		nblocks -= blocks;
+		if (!nblocks)
+			break;
+		block += blocks * BLAKE2S_BLOCK_SIZE;
+		simd_relax(&simd_context);
+	}
+out:
+	simd_put(&simd_context);
+	return used_arch;
+}