crypto: x86/aria - implement aria-avx512

aria-avx512 implementation uses AVX512 and GFNI.
It supports 64way parallel processing.
So, byteslicing code is changed to support 64way parallel.
And it exports some aria-avx2 functions such as encrypt() and decrypt().

AVX and AVX2 have 16 registers.
They should use memory to store/load state because of lack of registers.
But AVX512 supports 32 registers.
So, it doesn't require store/load in the s-box layer.
It means that it can reduce overhead of store/load in the s-box layer.
Also code become much simpler.

Benchmark with modprobe tcrypt mode=610 num_mb=8192, i3-12100:

ARIA-AVX512(128bit and 256bit)
    testing speed of multibuffer ecb(aria) (ecb-aria-avx512) encryption
tcrypt: 1 operation in 1504 cycles (1024 bytes)
tcrypt: 1 operation in 4595 cycles (4096 bytes)
tcrypt: 1 operation in 1763 cycles (1024 bytes)
tcrypt: 1 operation in 5540 cycles (4096 bytes)
    testing speed of multibuffer ecb(aria) (ecb-aria-avx512) decryption
tcrypt: 1 operation in 1502 cycles (1024 bytes)
tcrypt: 1 operation in 4615 cycles (4096 bytes)
tcrypt: 1 operation in 1759 cycles (1024 bytes)
tcrypt: 1 operation in 5554 cycles (4096 bytes)

ARIA-AVX2 with GFNI(128bit and 256bit)
    testing speed of multibuffer ecb(aria) (ecb-aria-avx2) encryption
tcrypt: 1 operation in 2003 cycles (1024 bytes)
tcrypt: 1 operation in 5867 cycles (4096 bytes)
tcrypt: 1 operation in 2358 cycles (1024 bytes)
tcrypt: 1 operation in 7295 cycles (4096 bytes)
    testing speed of multibuffer ecb(aria) (ecb-aria-avx2) decryption
tcrypt: 1 operation in 2004 cycles (1024 bytes)
tcrypt: 1 operation in 5956 cycles (4096 bytes)
tcrypt: 1 operation in 2409 cycles (1024 bytes)
tcrypt: 1 operation in 7564 cycles (4096 bytes)

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 250 insertions, 0 deletions

diff --git a/arch/x86/crypto/aria_gfni_avx512_glue.c b/arch/x86/crypto/aria_gfni_avx512_glue.c
new file mode 100644
index 000000000000..f4a2208d2638
--- /dev/null
+++ b/arch/x86/crypto/aria_gfni_avx512_glue.c
@@ -0,0 +1,250 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Glue Code for the AVX512/GFNI assembler implementation of the ARIA Cipher
+ *
+ * Copyright (c) 2022 Taehee Yoo <ap420073@gmail.com>
+ */
+
+#include <crypto/algapi.h>
+#include <crypto/internal/simd.h>
+#include <crypto/aria.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "ecb_cbc_helpers.h"
+#include "aria-avx.h"
+
+asmlinkage void aria_gfni_avx512_encrypt_64way(const void *ctx, u8 *dst,
+					       const u8 *src);
+asmlinkage void aria_gfni_avx512_decrypt_64way(const void *ctx, u8 *dst,
+					       const u8 *src);
+asmlinkage void aria_gfni_avx512_ctr_crypt_64way(const void *ctx, u8 *dst,
+						 const u8 *src,
+						 u8 *keystream, u8 *iv);
+
+static struct aria_avx_ops aria_ops;
+
+struct aria_avx512_request_ctx {
+	u8 keystream[ARIA_GFNI_AVX512_PARALLEL_BLOCK_SIZE];
+};
+
+static int ecb_do_encrypt(struct skcipher_request *req, const u32 *rkey)
+{
+	ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
+	ECB_BLOCK(ARIA_GFNI_AVX512_PARALLEL_BLOCKS, aria_ops.aria_encrypt_64way);
+	ECB_BLOCK(ARIA_AESNI_AVX2_PARALLEL_BLOCKS, aria_ops.aria_encrypt_32way);
+	ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_encrypt_16way);
+	ECB_BLOCK(1, aria_encrypt);
+	ECB_WALK_END();
+}
+
+static int ecb_do_decrypt(struct skcipher_request *req, const u32 *rkey)
+{
+	ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
+	ECB_BLOCK(ARIA_GFNI_AVX512_PARALLEL_BLOCKS, aria_ops.aria_decrypt_64way);
+	ECB_BLOCK(ARIA_AESNI_AVX2_PARALLEL_BLOCKS, aria_ops.aria_decrypt_32way);
+	ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_decrypt_16way);
+	ECB_BLOCK(1, aria_decrypt);
+	ECB_WALK_END();
+}
+
+static int aria_avx512_ecb_encrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	return ecb_do_encrypt(req, ctx->enc_key[0]);
+}
+
+static int aria_avx512_ecb_decrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	return ecb_do_decrypt(req, ctx->dec_key[0]);
+}
+
+static int aria_avx512_set_key(struct crypto_skcipher *tfm, const u8 *key,
+			    unsigned int keylen)
+{
+	return aria_set_key(&tfm->base, key, keylen);
+}
+
+static int aria_avx512_ctr_encrypt(struct skcipher_request *req)
+{
+	struct aria_avx512_request_ctx *req_ctx = skcipher_request_ctx(req);
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
+	unsigned int nbytes;
+	int err;
+
+	err = skcipher_walk_virt(&walk, req, false);
+
+	while ((nbytes = walk.nbytes) > 0) {
+		const u8 *src = walk.src.virt.addr;
+		u8 *dst = walk.dst.virt.addr;
+
+		while (nbytes >= ARIA_GFNI_AVX512_PARALLEL_BLOCK_SIZE) {
+			kernel_fpu_begin();
+			aria_ops.aria_ctr_crypt_64way(ctx, dst, src,
+						      &req_ctx->keystream[0],
+						      walk.iv);
+			kernel_fpu_end();
+			dst += ARIA_GFNI_AVX512_PARALLEL_BLOCK_SIZE;
+			src += ARIA_GFNI_AVX512_PARALLEL_BLOCK_SIZE;
+			nbytes -= ARIA_GFNI_AVX512_PARALLEL_BLOCK_SIZE;
+		}
+
+		while (nbytes >= ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE) {
+			kernel_fpu_begin();
+			aria_ops.aria_ctr_crypt_32way(ctx, dst, src,
+						      &req_ctx->keystream[0],
+						      walk.iv);
+			kernel_fpu_end();
+			dst += ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE;
+			src += ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE;
+			nbytes -= ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE;
+		}
+
+		while (nbytes >= ARIA_AESNI_PARALLEL_BLOCK_SIZE) {
+			kernel_fpu_begin();
+			aria_ops.aria_ctr_crypt_16way(ctx, dst, src,
+						      &req_ctx->keystream[0],
+						      walk.iv);
+			kernel_fpu_end();
+			dst += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
+			src += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
+			nbytes -= ARIA_AESNI_PARALLEL_BLOCK_SIZE;
+		}
+
+		while (nbytes >= ARIA_BLOCK_SIZE) {
+			memcpy(&req_ctx->keystream[0], walk.iv,
+			       ARIA_BLOCK_SIZE);
+			crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
+
+			aria_encrypt(ctx, &req_ctx->keystream[0],
+				     &req_ctx->keystream[0]);
+
+			crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
+				       ARIA_BLOCK_SIZE);
+			dst += ARIA_BLOCK_SIZE;
+			src += ARIA_BLOCK_SIZE;
+			nbytes -= ARIA_BLOCK_SIZE;
+		}
+
+		if (walk.nbytes == walk.total && nbytes > 0) {
+			memcpy(&req_ctx->keystream[0], walk.iv,
+			       ARIA_BLOCK_SIZE);
+			crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
+
+			aria_encrypt(ctx, &req_ctx->keystream[0],
+				     &req_ctx->keystream[0]);
+
+			crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
+				       nbytes);
+			dst += nbytes;
+			src += nbytes;
+			nbytes = 0;
+		}
+		err = skcipher_walk_done(&walk, nbytes);
+	}
+
+	return err;
+}
+
+static int aria_avx512_init_tfm(struct crypto_skcipher *tfm)
+{
+	crypto_skcipher_set_reqsize(tfm,
+				    sizeof(struct aria_avx512_request_ctx));
+
+	return 0;
+}
+
+static struct skcipher_alg aria_algs[] = {
+	{
+		.base.cra_name		= "__ecb(aria)",
+		.base.cra_driver_name	= "__ecb-aria-avx512",
+		.base.cra_priority	= 600,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= ARIA_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct aria_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= ARIA_MIN_KEY_SIZE,
+		.max_keysize		= ARIA_MAX_KEY_SIZE,
+		.setkey			= aria_avx512_set_key,
+		.encrypt		= aria_avx512_ecb_encrypt,
+		.decrypt		= aria_avx512_ecb_decrypt,
+	}, {
+		.base.cra_name		= "__ctr(aria)",
+		.base.cra_driver_name	= "__ctr-aria-avx512",
+		.base.cra_priority	= 600,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL |
+					  CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE,
+		.base.cra_blocksize	= 1,
+		.base.cra_ctxsize	= sizeof(struct aria_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= ARIA_MIN_KEY_SIZE,
+		.max_keysize		= ARIA_MAX_KEY_SIZE,
+		.ivsize			= ARIA_BLOCK_SIZE,
+		.chunksize		= ARIA_BLOCK_SIZE,
+		.setkey			= aria_avx512_set_key,
+		.encrypt		= aria_avx512_ctr_encrypt,
+		.decrypt		= aria_avx512_ctr_encrypt,
+		.init                   = aria_avx512_init_tfm,
+	}
+};
+
+static struct simd_skcipher_alg *aria_simd_algs[ARRAY_SIZE(aria_algs)];
+
+static int __init aria_avx512_init(void)
+{
+	const char *feature_name;
+
+	if (!boot_cpu_has(X86_FEATURE_AVX) ||
+	    !boot_cpu_has(X86_FEATURE_AVX2) ||
+	    !boot_cpu_has(X86_FEATURE_AVX512F) ||
+	    !boot_cpu_has(X86_FEATURE_AVX512VL) ||
+	    !boot_cpu_has(X86_FEATURE_GFNI) ||
+	    !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
+		pr_info("AVX512/GFNI instructions are not detected.\n");
+		return -ENODEV;
+	}
+
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
+			       XFEATURE_MASK_AVX512, &feature_name)) {
+		pr_info("CPU feature '%s' is not supported.\n", feature_name);
+		return -ENODEV;
+	}
+
+	aria_ops.aria_encrypt_16way = aria_aesni_avx_gfni_encrypt_16way;
+	aria_ops.aria_decrypt_16way = aria_aesni_avx_gfni_decrypt_16way;
+	aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_gfni_ctr_crypt_16way;
+	aria_ops.aria_encrypt_32way = aria_aesni_avx2_gfni_encrypt_32way;
+	aria_ops.aria_decrypt_32way = aria_aesni_avx2_gfni_decrypt_32way;
+	aria_ops.aria_ctr_crypt_32way = aria_aesni_avx2_gfni_ctr_crypt_32way;
+	aria_ops.aria_encrypt_64way = aria_gfni_avx512_encrypt_64way;
+	aria_ops.aria_decrypt_64way = aria_gfni_avx512_decrypt_64way;
+	aria_ops.aria_ctr_crypt_64way = aria_gfni_avx512_ctr_crypt_64way;
+
+	return simd_register_skciphers_compat(aria_algs,
+					      ARRAY_SIZE(aria_algs),
+					      aria_simd_algs);
+}
+
+static void __exit aria_avx512_exit(void)
+{
+	simd_unregister_skciphers(aria_algs, ARRAY_SIZE(aria_algs),
+				  aria_simd_algs);
+}
+
+module_init(aria_avx512_init);
+module_exit(aria_avx512_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Taehee Yoo <ap420073@gmail.com>");
+MODULE_DESCRIPTION("ARIA Cipher Algorithm, AVX512/GFNI optimized");
+MODULE_ALIAS_CRYPTO("aria");
+MODULE_ALIAS_CRYPTO("aria-gfni-avx512");