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Diffstat (limited to 'lib/zinc/blake2s/blake2s-x86_64-glue.c')
-rw-r--r--lib/zinc/blake2s/blake2s-x86_64-glue.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/zinc/blake2s/blake2s-x86_64-glue.c b/lib/zinc/blake2s/blake2s-x86_64-glue.c
new file mode 100644
index 000000000000..afccdc857243
--- /dev/null
+++ b/lib/zinc/blake2s/blake2s-x86_64-glue.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2015-2019 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 bool *const blake2s_nobs[] __initconst = { &blake2s_use_avx512 };
+
+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);
+ 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);
+}
+
+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;
+}