1 files changed, 48 insertions, 0 deletions
diff --git a/lib/crypto/sparc/md5.h b/lib/crypto/sparc/md5.h
new file mode 100644
index 000000000000..3995f3e075eb
--- /dev/null
+++ b/lib/crypto/sparc/md5.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * MD5 accelerated using the sparc64 crypto opcodes
+ *
+ * Copyright (c) Alan Smithee.
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
+ * Copyright (c) Mathias Krause <minipli@googlemail.com>
+ * Copyright (c) Cryptoapi developers.
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ */
+
+#include <asm/elf.h>
+#include <asm/opcodes.h>
+#include <asm/pstate.h>
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_md5_opcodes);
+
+asmlinkage void md5_sparc64_transform(struct md5_block_state *state,
+				      const u8 *data, size_t nblocks);
+
+static void md5_blocks(struct md5_block_state *state,
+		       const u8 *data, size_t nblocks)
+{
+	if (static_branch_likely(&have_md5_opcodes)) {
+		cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
+		md5_sparc64_transform(state, data, nblocks);
+		le32_to_cpu_array(state->h, ARRAY_SIZE(state->h));
+	} else {
+		md5_blocks_generic(state, data, nblocks);
+	}
+}
+
+#define md5_mod_init_arch md5_mod_init_arch
+static void md5_mod_init_arch(void)
+{
+	unsigned long cfr;
+
+	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+		return;
+
+	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+	if (!(cfr & CFR_MD5))
+		return;
+
+	static_branch_enable(&have_md5_opcodes);
+	pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n");
+}