1 files changed, 60 insertions, 0 deletions
diff --git a/src/crypto/zinc/poly1305/poly1305-ppc-glue.c b/src/crypto/zinc/poly1305/poly1305-ppc-glue.c
new file mode 100644
index 0000000..265467e
--- /dev/null
+++ b/src/crypto/zinc/poly1305/poly1305-ppc-glue.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2019 Shawn Landden <shawn@git.icu>. All Rights Reserved.
+ */
+
+#include <asm/cpufeature.h>
+
+asmlinkage void poly1305_init_int(void *ctx, const u8 key[16]);
+asmlinkage void poly1305_blocks_int(void *ctx, const u8 *inp, size_t len,
+				    u32 padbit);
+asmlinkage void poly1305_emit_int(void *ctx, u8 mac[16],
+				  const u32 nonce[4]);
+asmlinkage void poly1305_blocks_vsx(void *ctx, const u8 *inp, size_t len,
+				    u32 padbit);
+static bool *const poly1305_nobs[] __initconst = {};
+static void __init poly1305_fpu_init(void) {}
+
+static inline bool poly1305_init_arch(void *ctx,
+				      const u8 key[POLY1305_KEY_SIZE])
+{
+	poly1305_init_int(ctx, key);
+	return true;
+}
+
+static inline bool poly1305_blocks_arch(void *ctx, const u8 *inp,
+					size_t len, const u32 padbit,
+					simd_context_t *simd_context)
+{
+	/* SIMD disables preemption, so relax after processing each page. */
+	BUILD_BUG_ON(PAGE_SIZE < POLY1305_BLOCK_SIZE ||
+		     PAGE_SIZE % POLY1305_BLOCK_SIZE);
+
+	if (!IS_ENABLED(CONFIG_VSX) ||
+	    !cpu_have_feature(PPC_MODULE_FEATURE_VEC_CRYPTO) ||
+	    !simd_use(simd_context)) {
+		convert_to_base2_64(ctx);
+		poly1305_blocks_int(ctx, inp, len, padbit);
+		return true;
+	}
+
+	for (;;) {
+		const size_t bytes = min_t(size_t, len, PAGE_SIZE);
+
+		poly1305_blocks_vsx(ctx, inp, bytes, padbit);
+		len -= bytes;
+		if (!len)
+			break;
+		inp += bytes;
+		simd_relax(simd_context);
+	}
+	return true;
+}
+
+static inline bool poly1305_emit_arch(void *ctx, u8 mac[POLY1305_MAC_SIZE],
+				      const u32 nonce[4],
+				      simd_context_t *simd_context)
+{
+	poly1305_emit_int(ctx, mac, nonce);
+	return true;
+}