crypto: import zinc

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 69 insertions, 0 deletions

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 <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#include <zinc/poly1305.h>
+#include <asm/hwcap.h>
+#include <asm/neon.h>
+
+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