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Diffstat (limited to 'src/crypto/zinc/chacha20/chacha20-arm-glue.h')
-rw-r--r--src/crypto/zinc/chacha20/chacha20-arm-glue.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/crypto/zinc/chacha20/chacha20-arm-glue.h b/src/crypto/zinc/chacha20/chacha20-arm-glue.h
new file mode 100644
index 0000000..d323615
--- /dev/null
+++ b/src/crypto/zinc/chacha20/chacha20-arm-glue.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#include <zinc/chacha20.h>
+#include <asm/hwcap.h>
+#include <asm/neon.h>
+
+asmlinkage void chacha20_arm(u8 *out, const u8 *in, const size_t len,
+ const u32 key[8], const u32 counter[4]);
+#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && \
+ (defined(CONFIG_64BIT) || __LINUX_ARM_ARCH__ >= 7)
+#define ARM_USE_NEON
+asmlinkage void chacha20_neon(u8 *out, const u8 *in, const size_t len,
+ const u32 key[8], const u32 counter[4]);
+#endif
+
+static bool chacha20_use_neon __ro_after_init;
+
+void __init chacha20_fpu_init(void)
+{
+#if defined(CONFIG_ARM64)
+ chacha20_use_neon = elf_hwcap & HWCAP_ASIMD;
+#elif defined(CONFIG_ARM)
+ chacha20_use_neon = elf_hwcap & HWCAP_NEON;
+#endif
+}
+
+static inline bool chacha20_arch(u8 *dst, const u8 *src, const size_t len,
+ const u32 key[8], const u32 counter[4],
+ simd_context_t simd_context)
+{
+#if defined(ARM_USE_NEON)
+ if (simd_context == HAVE_FULL_SIMD && chacha20_use_neon) {
+ chacha20_neon(dst, src, len, key, counter);
+ return true;
+ }
+#endif
+ chacha20_arm(dst, src, len, key, counter);
+ return true;
+}
+
+static inline bool hchacha20_arch(u8 *derived_key, const u8 *nonce,
+ const u8 *key, simd_context_t simd_context)
+{
+ return false;
+}
+
+#define HAVE_CHACHA20_ARCH_IMPLEMENTATION