arch/x86/crypto/serpent_avx_glue.c - kernel/common - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Glue Code for AVX assembler versions of Serpent Cipher
  *
  * Copyright (C) 2012 Johannes Goetzfried
  *     <[email protected]>
  *
  * Copyright © 2011-2013 Jussi Kivilinna <[email protected]>
  */

 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/crypto.h>
 #include <linux/err.h>
 #include <crypto/algapi.h>
 #include <crypto/internal/simd.h>
 #include <crypto/serpent.h>
 #include <crypto/xts.h>
 #include <asm/crypto/glue_helper.h>
 #include <asm/crypto/serpent-avx.h>

 /* 8-way parallel cipher functions */
 asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst,
 					 const u8 *src);
 EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);

 asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
 					 const u8 *src);
 EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);

 asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
 					 const u8 *src);
 EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);

 asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx *ctx, u8 *dst,
 				     const u8 *src, le128 *iv);
 EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);

 asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst,
 					 const u8 *src, le128 *iv);
 EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);

 asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
 					 const u8 *src, le128 *iv);
 EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);

 void __serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
 {
 	be128 ctrblk;

 	le128_to_be128(&ctrblk, iv);
 	le128_inc(iv);

 	__serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
 	u128_xor(dst, src, (u128 *)&ctrblk);
 }
 EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);

 void serpent_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
 {
 	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
 				  GLUE_FUNC_CAST(__serpent_encrypt));
 }
 EXPORT_SYMBOL_GPL(serpent_xts_enc);

 void serpent_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
 {
 	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
 				  GLUE_FUNC_CAST(__serpent_decrypt));
 }
 EXPORT_SYMBOL_GPL(serpent_xts_dec);

 static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
 				   const u8 *key, unsigned int keylen)
 {
 	return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
 }

 int xts_serpent_setkey(struct crypto_skcipher *tfm, const u8 *key,
 		       unsigned int keylen)
 {
 	struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 	int err;

 	err = xts_verify_key(tfm, key, keylen);
 	if (err)
 		return err;

 	/* first half of xts-key is for crypt */
 	err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
 	if (err)
 		return err;

 	/* second half of xts-key is for tweak */
 	return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
 }
 EXPORT_SYMBOL_GPL(xts_serpent_setkey);

 static const struct common_glue_ctx serpent_enc = {
 	.num_funcs = 2,
 	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

 	.funcs = { {
 		.num_blocks = SERPENT_PARALLEL_BLOCKS,
 		.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) }
 	}, {
 		.num_blocks = 1,
 		.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
 	} }
 };

 static const struct common_glue_ctx serpent_ctr = {
 	.num_funcs = 2,
 	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

 	.funcs = { {
 		.num_blocks = SERPENT_PARALLEL_BLOCKS,
 		.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) }
 	}, {
 		.num_blocks = 1,
 		.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) }
 	} }
 };

 static const struct common_glue_ctx serpent_enc_xts = {
 	.num_funcs = 2,
 	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

 	.funcs = { {
 		.num_blocks = SERPENT_PARALLEL_BLOCKS,
 		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) }
 	}, {
 		.num_blocks = 1,
 		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) }
 	} }
 };

 static const struct common_glue_ctx serpent_dec = {
 	.num_funcs = 2,
 	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

 	.funcs = { {
 		.num_blocks = SERPENT_PARALLEL_BLOCKS,
 		.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) }
 	}, {
 		.num_blocks = 1,
 		.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
 	} }
 };

 static const struct common_glue_ctx serpent_dec_cbc = {
 	.num_funcs = 2,
 	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

 	.funcs = { {
 		.num_blocks = SERPENT_PARALLEL_BLOCKS,
 		.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) }
 	}, {
 		.num_blocks = 1,
 		.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
 	} }
 };

 static const struct common_glue_ctx serpent_dec_xts = {
 	.num_funcs = 2,
 	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

 	.funcs = { {
 		.num_blocks = SERPENT_PARALLEL_BLOCKS,
 		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) }
 	}, {
 		.num_blocks = 1,
 		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) }
 	} }
 };

 static int ecb_encrypt(struct skcipher_request *req)
 {
 	return glue_ecb_req_128bit(&serpent_enc, req);
 }

 static int ecb_decrypt(struct skcipher_request *req)
 {
 	return glue_ecb_req_128bit(&serpent_dec, req);
 }

 static int cbc_encrypt(struct skcipher_request *req)
 {
 	return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__serpent_encrypt),
 					   req);
 }

 static int cbc_decrypt(struct skcipher_request *req)
 {
 	return glue_cbc_decrypt_req_128bit(&serpent_dec_cbc, req);
 }

 static int ctr_crypt(struct skcipher_request *req)
 {
 	return glue_ctr_req_128bit(&serpent_ctr, req);
 }

 static int xts_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);

 	return glue_xts_req_128bit(&serpent_enc_xts, req,
 				   XTS_TWEAK_CAST(__serpent_encrypt),
 				   &ctx->tweak_ctx, &ctx->crypt_ctx);
 }

 static int xts_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);

 	return glue_xts_req_128bit(&serpent_dec_xts, req,
 				   XTS_TWEAK_CAST(__serpent_encrypt),
 				   &ctx->tweak_ctx, &ctx->crypt_ctx);
 }

 static struct skcipher_alg serpent_algs[] = {
 	{
 		.base.cra_name		= "__ecb(serpent)",
 		.base.cra_driver_name	= "__ecb-serpent-avx",
 		.base.cra_priority	= 500,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= SERPENT_MIN_KEY_SIZE,
 		.max_keysize		= SERPENT_MAX_KEY_SIZE,
 		.setkey			= serpent_setkey_skcipher,
 		.encrypt		= ecb_encrypt,
 		.decrypt		= ecb_decrypt,
 	}, {
 		.base.cra_name		= "__cbc(serpent)",
 		.base.cra_driver_name	= "__cbc-serpent-avx",
 		.base.cra_priority	= 500,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= SERPENT_MIN_KEY_SIZE,
 		.max_keysize		= SERPENT_MAX_KEY_SIZE,
 		.ivsize			= SERPENT_BLOCK_SIZE,
 		.setkey			= serpent_setkey_skcipher,
 		.encrypt		= cbc_encrypt,
 		.decrypt		= cbc_decrypt,
 	}, {
 		.base.cra_name		= "__ctr(serpent)",
 		.base.cra_driver_name	= "__ctr-serpent-avx",
 		.base.cra_priority	= 500,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= 1,
 		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= SERPENT_MIN_KEY_SIZE,
 		.max_keysize		= SERPENT_MAX_KEY_SIZE,
 		.ivsize			= SERPENT_BLOCK_SIZE,
 		.chunksize		= SERPENT_BLOCK_SIZE,
 		.setkey			= serpent_setkey_skcipher,
 		.encrypt		= ctr_crypt,
 		.decrypt		= ctr_crypt,
 	}, {
 		.base.cra_name		= "__xts(serpent)",
 		.base.cra_driver_name	= "__xts-serpent-avx",
 		.base.cra_priority	= 500,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct serpent_xts_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= 2 * SERPENT_MIN_KEY_SIZE,
 		.max_keysize		= 2 * SERPENT_MAX_KEY_SIZE,
 		.ivsize			= SERPENT_BLOCK_SIZE,
 		.setkey			= xts_serpent_setkey,
 		.encrypt		= xts_encrypt,
 		.decrypt		= xts_decrypt,
 	},
 };

 static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];

 static int __init serpent_init(void)
 {
 	const char *feature_name;

 	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
 				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

 	return simd_register_skciphers_compat(serpent_algs,
 					      ARRAY_SIZE(serpent_algs),
 					      serpent_simd_algs);
 }

 static void __exit serpent_exit(void)
 {
 	simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
 				  serpent_simd_algs);
 }

 module_init(serpent_init);
 module_exit(serpent_exit);

 MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_CRYPTO("serpent");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Glue Code for AVX assembler versions of Serpent Cipher
	*
	* Copyright (C) 2012 Johannes Goetzfried
	* <[email protected]>
	*
	* Copyright © 2011-2013 Jussi Kivilinna <[email protected]>
	*/

	#include <linux/module.h>
	#include <linux/types.h>
	#include <linux/crypto.h>
	#include <linux/err.h>
	#include <crypto/algapi.h>
	#include <crypto/internal/simd.h>
	#include <crypto/serpent.h>
	#include <crypto/xts.h>
	#include <asm/crypto/glue_helper.h>
	#include <asm/crypto/serpent-avx.h>

	/* 8-way parallel cipher functions */
	asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx ctx, u8 dst,
	const u8 *src);
	EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);

	asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx ctx, u8 dst,
	const u8 *src);
	EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);

	asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx ctx, u8 dst,
	const u8 *src);
	EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);

	asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx ctx, u8 dst,
	const u8 src, le128 iv);
	EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);

	asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx ctx, u8 dst,
	const u8 src, le128 iv);
	EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);

	asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx ctx, u8 dst,
	const u8 src, le128 iv);
	EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);

	void __serpent_crypt_ctr(void ctx, u128 dst, const u128 src, le128 iv)
	{
	be128 ctrblk;

	le128_to_be128(&ctrblk, iv);
	le128_inc(iv);

	__serpent_encrypt(ctx, (u8 )&ctrblk, (u8 )&ctrblk);
	u128_xor(dst, src, (u128 *)&ctrblk);
	}
	EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);

	void serpent_xts_enc(void ctx, u128 dst, const u128 src, le128 iv)
	{
	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
	GLUE_FUNC_CAST(__serpent_encrypt));
	}
	EXPORT_SYMBOL_GPL(serpent_xts_enc);

	void serpent_xts_dec(void ctx, u128 dst, const u128 src, le128 iv)
	{
	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
	GLUE_FUNC_CAST(__serpent_decrypt));
	}
	EXPORT_SYMBOL_GPL(serpent_xts_dec);

	static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
	const u8 *key, unsigned int keylen)
	{
	return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
	}

	int xts_serpent_setkey(struct crypto_skcipher tfm, const u8 key,
	unsigned int keylen)
	{
	struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
	int err;

	err = xts_verify_key(tfm, key, keylen);
	if (err)
	return err;

	/* first half of xts-key is for crypt */
	err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
	if (err)
	return err;

	/* second half of xts-key is for tweak */
	return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
	}
	EXPORT_SYMBOL_GPL(xts_serpent_setkey);

	static const struct common_glue_ctx serpent_enc = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) }
	}, {
	.num_blocks = 1,
	.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
	} }
	};

	static const struct common_glue_ctx serpent_ctr = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) }
	}, {
	.num_blocks = 1,
	.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) }
	} }
	};

	static const struct common_glue_ctx serpent_enc_xts = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) }
	}, {
	.num_blocks = 1,
	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) }
	} }
	};

	static const struct common_glue_ctx serpent_dec = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) }
	}, {
	.num_blocks = 1,
	.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
	} }
	};

	static const struct common_glue_ctx serpent_dec_cbc = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) }
	}, {
	.num_blocks = 1,
	.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
	} }
	};

	static const struct common_glue_ctx serpent_dec_xts = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) }
	}, {
	.num_blocks = 1,
	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) }
	} }
	};

	static int ecb_encrypt(struct skcipher_request *req)
	{
	return glue_ecb_req_128bit(&serpent_enc, req);
	}

	static int ecb_decrypt(struct skcipher_request *req)
	{
	return glue_ecb_req_128bit(&serpent_dec, req);
	}

	static int cbc_encrypt(struct skcipher_request *req)
	{
	return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__serpent_encrypt),
	req);
	}

	static int cbc_decrypt(struct skcipher_request *req)
	{
	return glue_cbc_decrypt_req_128bit(&serpent_dec_cbc, req);
	}

	static int ctr_crypt(struct skcipher_request *req)
	{
	return glue_ctr_req_128bit(&serpent_ctr, req);
	}

	static int xts_encrypt(struct skcipher_request *req)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);

	return glue_xts_req_128bit(&serpent_enc_xts, req,
	XTS_TWEAK_CAST(__serpent_encrypt),
	&ctx->tweak_ctx, &ctx->crypt_ctx);
	}

	static int xts_decrypt(struct skcipher_request *req)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);

	return glue_xts_req_128bit(&serpent_dec_xts, req,
	XTS_TWEAK_CAST(__serpent_encrypt),
	&ctx->tweak_ctx, &ctx->crypt_ctx);
	}

	static struct skcipher_alg serpent_algs[] = {
	{
	.base.cra_name = "__ecb(serpent)",
	.base.cra_driver_name = "__ecb-serpent-avx",
	.base.cra_priority = 500,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = SERPENT_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct serpent_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = SERPENT_MIN_KEY_SIZE,
	.max_keysize = SERPENT_MAX_KEY_SIZE,
	.setkey = serpent_setkey_skcipher,
	.encrypt = ecb_encrypt,
	.decrypt = ecb_decrypt,
	}, {
	.base.cra_name = "__cbc(serpent)",
	.base.cra_driver_name = "__cbc-serpent-avx",
	.base.cra_priority = 500,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = SERPENT_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct serpent_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = SERPENT_MIN_KEY_SIZE,
	.max_keysize = SERPENT_MAX_KEY_SIZE,
	.ivsize = SERPENT_BLOCK_SIZE,
	.setkey = serpent_setkey_skcipher,
	.encrypt = cbc_encrypt,
	.decrypt = cbc_decrypt,
	}, {
	.base.cra_name = "__ctr(serpent)",
	.base.cra_driver_name = "__ctr-serpent-avx",
	.base.cra_priority = 500,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = 1,
	.base.cra_ctxsize = sizeof(struct serpent_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = SERPENT_MIN_KEY_SIZE,
	.max_keysize = SERPENT_MAX_KEY_SIZE,
	.ivsize = SERPENT_BLOCK_SIZE,
	.chunksize = SERPENT_BLOCK_SIZE,
	.setkey = serpent_setkey_skcipher,
	.encrypt = ctr_crypt,
	.decrypt = ctr_crypt,
	}, {
	.base.cra_name = "__xts(serpent)",
	.base.cra_driver_name = "__xts-serpent-avx",
	.base.cra_priority = 500,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = SERPENT_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct serpent_xts_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = 2 * SERPENT_MIN_KEY_SIZE,
	.max_keysize = 2 * SERPENT_MAX_KEY_SIZE,
	.ivsize = SERPENT_BLOCK_SIZE,
	.setkey = xts_serpent_setkey,
	.encrypt = xts_encrypt,
	.decrypt = xts_decrypt,
	},
	};

	static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];

	static int __init serpent_init(void)
	{
	const char *feature_name;

	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE \| XFEATURE_MASK_YMM,
	&feature_name)) {
	pr_info("CPU feature '%s' is not supported.\n", feature_name);
	return -ENODEV;
	}

	return simd_register_skciphers_compat(serpent_algs,
	ARRAY_SIZE(serpent_algs),
	serpent_simd_algs);
	}

	static void __exit serpent_exit(void)
	{
	simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
	serpent_simd_algs);
	}

	module_init(serpent_init);
	module_exit(serpent_exit);

	MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS_CRYPTO("serpent");