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-rw-r--r--lib/crypto/arm/sha512.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/crypto/arm/sha512.h b/lib/crypto/arm/sha512.h
new file mode 100644
index 000000000000..f147b6490d6c
--- /dev/null
+++ b/lib/crypto/arm/sha512.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * arm32-optimized SHA-512 block function
+ *
+ * Copyright 2025 Google LLC
+ */
+
+#include <asm/neon.h>
+#include <crypto/internal/simd.h>
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
+
+asmlinkage void sha512_block_data_order(struct sha512_block_state *state,
+ const u8 *data, size_t nblocks);
+asmlinkage void sha512_block_data_order_neon(struct sha512_block_state *state,
+ const u8 *data, size_t nblocks);
+
+static void sha512_blocks(struct sha512_block_state *state,
+ const u8 *data, size_t nblocks)
+{
+ if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
+ static_branch_likely(&have_neon) && likely(crypto_simd_usable())) {
+ kernel_neon_begin();
+ sha512_block_data_order_neon(state, data, nblocks);
+ kernel_neon_end();
+ } else {
+ sha512_block_data_order(state, data, nblocks);
+ }
+}
+
+#ifdef CONFIG_KERNEL_MODE_NEON
+#define sha512_mod_init_arch sha512_mod_init_arch
+static inline void sha512_mod_init_arch(void)
+{
+ if (cpu_has_neon())
+ static_branch_enable(&have_neon);
+}
+#endif /* CONFIG_KERNEL_MODE_NEON */