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-rw-r--r--lib/crypto/riscv/sha512.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/crypto/riscv/sha512.h b/lib/crypto/riscv/sha512.h
new file mode 100644
index 000000000000..9d0abede322f
--- /dev/null
+++ b/lib/crypto/riscv/sha512.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * SHA-512 and SHA-384 using the RISC-V vector crypto extensions
+ *
+ * Copyright (C) 2023 VRULL GmbH
+ * Author: Heiko Stuebner <heiko.stuebner@vrull.eu>
+ *
+ * Copyright (C) 2023 SiFive, Inc.
+ * Author: Jerry Shih <jerry.shih@sifive.com>
+ */
+
+#include <asm/simd.h>
+#include <asm/vector.h>
+#include <crypto/internal/simd.h>
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_extensions);
+
+asmlinkage void sha512_transform_zvknhb_zvkb(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 (static_branch_likely(&have_extensions) &&
+ likely(crypto_simd_usable())) {
+ kernel_vector_begin();
+ sha512_transform_zvknhb_zvkb(state, data, nblocks);
+ kernel_vector_end();
+ } else {
+ sha512_blocks_generic(state, data, nblocks);
+ }
+}
+
+#define sha512_mod_init_arch sha512_mod_init_arch
+static inline void sha512_mod_init_arch(void)
+{
+ if (riscv_isa_extension_available(NULL, ZVKNHB) &&
+ riscv_isa_extension_available(NULL, ZVKB) &&
+ riscv_vector_vlen() >= 128)
+ static_branch_enable(&have_extensions);
+}