arch/x86/crypto/cast5_avx_glue.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Glue Code for the AVX assembler implementation of the Cast5 Cipher
  *
  * Copyright (C) 2012 Johannes Goetzfried
  *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
  */

 #include <asm/crypto/glue_helper.h>
 #include <crypto/algapi.h>
 #include <crypto/cast5.h>
 #include <crypto/internal/simd.h>
 #include <linux/crypto.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/types.h>

 #define CAST5_PARALLEL_BLOCKS 16

 asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx *ctx, u8 *dst,
 				    const u8 *src);
 asmlinkage void cast5_ecb_dec_16way(struct cast5_ctx *ctx, u8 *dst,
 				    const u8 *src);
 asmlinkage void cast5_cbc_dec_16way(struct cast5_ctx *ctx, u8 *dst,
 				    const u8 *src);
 asmlinkage void cast5_ctr_16way(struct cast5_ctx *ctx, u8 *dst, const u8 *src,
 				__be64 *iv);

 static int cast5_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
 				 unsigned int keylen)
 {
 	return cast5_setkey(&tfm->base, key, keylen);
 }

 static inline bool cast5_fpu_begin(bool fpu_enabled, struct skcipher_walk *walk,
 				   unsigned int nbytes)
 {
 	return glue_fpu_begin(CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS,
 			      walk, fpu_enabled, nbytes);
 }

 static inline void cast5_fpu_end(bool fpu_enabled)
 {
 	return glue_fpu_end(fpu_enabled);
 }

 static int ecb_crypt(struct skcipher_request *req, bool enc)
 {
 	bool fpu_enabled = false;
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
 	struct skcipher_walk walk;
 	const unsigned int bsize = CAST5_BLOCK_SIZE;
 	unsigned int nbytes;
 	void (*fn)(struct cast5_ctx *ctx, u8 *dst, const u8 *src);
 	int err;

 	err = skcipher_walk_virt(&walk, req, false);

 	while ((nbytes = walk.nbytes)) {
 		u8 *wsrc = walk.src.virt.addr;
 		u8 *wdst = walk.dst.virt.addr;

 		fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);

 		/* Process multi-block batch */
 		if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
 			fn = (enc) ? cast5_ecb_enc_16way : cast5_ecb_dec_16way;
 			do {
 				fn(ctx, wdst, wsrc);

 				wsrc += bsize * CAST5_PARALLEL_BLOCKS;
 				wdst += bsize * CAST5_PARALLEL_BLOCKS;
 				nbytes -= bsize * CAST5_PARALLEL_BLOCKS;
 			} while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);

 			if (nbytes < bsize)
 				goto done;
 		}

 		fn = (enc) ? __cast5_encrypt : __cast5_decrypt;

 		/* Handle leftovers */
 		do {
 			fn(ctx, wdst, wsrc);

 			wsrc += bsize;
 			wdst += bsize;
 			nbytes -= bsize;
 		} while (nbytes >= bsize);

 done:
 		err = skcipher_walk_done(&walk, nbytes);
 	}

 	cast5_fpu_end(fpu_enabled);
 	return err;
 }

 static int ecb_encrypt(struct skcipher_request *req)
 {
 	return ecb_crypt(req, true);
 }

 static int ecb_decrypt(struct skcipher_request *req)
 {
 	return ecb_crypt(req, false);
 }

 static int cbc_encrypt(struct skcipher_request *req)
 {
 	const unsigned int bsize = CAST5_BLOCK_SIZE;
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct cast5_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)) {
 		u64 *src = (u64 *)walk.src.virt.addr;
 		u64 *dst = (u64 *)walk.dst.virt.addr;
 		u64 *iv = (u64 *)walk.iv;

 		do {
 			*dst = *src ^ *iv;
 			__cast5_encrypt(ctx, (u8 *)dst, (u8 *)dst);
 			iv = dst;
 			src++;
 			dst++;
 			nbytes -= bsize;
 		} while (nbytes >= bsize);

 		*(u64 *)walk.iv = *iv;
 		err = skcipher_walk_done(&walk, nbytes);
 	}

 	return err;
 }

 static unsigned int __cbc_decrypt(struct cast5_ctx *ctx,
 				  struct skcipher_walk *walk)
 {
 	const unsigned int bsize = CAST5_BLOCK_SIZE;
 	unsigned int nbytes = walk->nbytes;
 	u64 *src = (u64 *)walk->src.virt.addr;
 	u64 *dst = (u64 *)walk->dst.virt.addr;
 	u64 last_iv;

 	/* Start of the last block. */
 	src += nbytes / bsize - 1;
 	dst += nbytes / bsize - 1;

 	last_iv = *src;

 	/* Process multi-block batch */
 	if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
 		do {
 			nbytes -= bsize * (CAST5_PARALLEL_BLOCKS - 1);
 			src -= CAST5_PARALLEL_BLOCKS - 1;
 			dst -= CAST5_PARALLEL_BLOCKS - 1;

 			cast5_cbc_dec_16way(ctx, (u8 *)dst, (u8 *)src);

 			nbytes -= bsize;
 			if (nbytes < bsize)
 				goto done;

 			*dst ^= *(src - 1);
 			src -= 1;
 			dst -= 1;
 		} while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);
 	}

 	/* Handle leftovers */
 	for (;;) {
 		__cast5_decrypt(ctx, (u8 *)dst, (u8 *)src);

 		nbytes -= bsize;
 		if (nbytes < bsize)
 			break;

 		*dst ^= *(src - 1);
 		src -= 1;
 		dst -= 1;
 	}

 done:
 	*dst ^= *(u64 *)walk->iv;
 	*(u64 *)walk->iv = last_iv;

 	return nbytes;
 }

 static int cbc_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
 	bool fpu_enabled = false;
 	struct skcipher_walk walk;
 	unsigned int nbytes;
 	int err;

 	err = skcipher_walk_virt(&walk, req, false);

 	while ((nbytes = walk.nbytes)) {
 		fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);
 		nbytes = __cbc_decrypt(ctx, &walk);
 		err = skcipher_walk_done(&walk, nbytes);
 	}

 	cast5_fpu_end(fpu_enabled);
 	return err;
 }

 static void ctr_crypt_final(struct skcipher_walk *walk, struct cast5_ctx *ctx)
 {
 	u8 *ctrblk = walk->iv;
 	u8 keystream[CAST5_BLOCK_SIZE];
 	u8 *src = walk->src.virt.addr;
 	u8 *dst = walk->dst.virt.addr;
 	unsigned int nbytes = walk->nbytes;

 	__cast5_encrypt(ctx, keystream, ctrblk);
 	crypto_xor_cpy(dst, keystream, src, nbytes);

 	crypto_inc(ctrblk, CAST5_BLOCK_SIZE);
 }

 static unsigned int __ctr_crypt(struct skcipher_walk *walk,
 				struct cast5_ctx *ctx)
 {
 	const unsigned int bsize = CAST5_BLOCK_SIZE;
 	unsigned int nbytes = walk->nbytes;
 	u64 *src = (u64 *)walk->src.virt.addr;
 	u64 *dst = (u64 *)walk->dst.virt.addr;

 	/* Process multi-block batch */
 	if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
 		do {
 			cast5_ctr_16way(ctx, (u8 *)dst, (u8 *)src,
 					(__be64 *)walk->iv);

 			src += CAST5_PARALLEL_BLOCKS;
 			dst += CAST5_PARALLEL_BLOCKS;
 			nbytes -= bsize * CAST5_PARALLEL_BLOCKS;
 		} while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);

 		if (nbytes < bsize)
 			goto done;
 	}

 	/* Handle leftovers */
 	do {
 		u64 ctrblk;

 		if (dst != src)
 			*dst = *src;

 		ctrblk = *(u64 *)walk->iv;
 		be64_add_cpu((__be64 *)walk->iv, 1);

 		__cast5_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
 		*dst ^= ctrblk;

 		src += 1;
 		dst += 1;
 		nbytes -= bsize;
 	} while (nbytes >= bsize);

 done:
 	return nbytes;
 }

 static int ctr_crypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
 	bool fpu_enabled = false;
 	struct skcipher_walk walk;
 	unsigned int nbytes;
 	int err;

 	err = skcipher_walk_virt(&walk, req, false);

 	while ((nbytes = walk.nbytes) >= CAST5_BLOCK_SIZE) {
 		fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);
 		nbytes = __ctr_crypt(&walk, ctx);
 		err = skcipher_walk_done(&walk, nbytes);
 	}

 	cast5_fpu_end(fpu_enabled);

 	if (walk.nbytes) {
 		ctr_crypt_final(&walk, ctx);
 		err = skcipher_walk_done(&walk, 0);
 	}

 	return err;
 }

 static struct skcipher_alg cast5_algs[] = {
 	{
 		.base.cra_name		= "__ecb(cast5)",
 		.base.cra_driver_name	= "__ecb-cast5-avx",
 		.base.cra_priority	= 200,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= CAST5_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct cast5_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= CAST5_MIN_KEY_SIZE,
 		.max_keysize		= CAST5_MAX_KEY_SIZE,
 		.setkey			= cast5_setkey_skcipher,
 		.encrypt		= ecb_encrypt,
 		.decrypt		= ecb_decrypt,
 	}, {
 		.base.cra_name		= "__cbc(cast5)",
 		.base.cra_driver_name	= "__cbc-cast5-avx",
 		.base.cra_priority	= 200,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= CAST5_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct cast5_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= CAST5_MIN_KEY_SIZE,
 		.max_keysize		= CAST5_MAX_KEY_SIZE,
 		.ivsize			= CAST5_BLOCK_SIZE,
 		.setkey			= cast5_setkey_skcipher,
 		.encrypt		= cbc_encrypt,
 		.decrypt		= cbc_decrypt,
 	}, {
 		.base.cra_name		= "__ctr(cast5)",
 		.base.cra_driver_name	= "__ctr-cast5-avx",
 		.base.cra_priority	= 200,
 		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
 		.base.cra_blocksize	= 1,
 		.base.cra_ctxsize	= sizeof(struct cast5_ctx),
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= CAST5_MIN_KEY_SIZE,
 		.max_keysize		= CAST5_MAX_KEY_SIZE,
 		.ivsize			= CAST5_BLOCK_SIZE,
 		.chunksize		= CAST5_BLOCK_SIZE,
 		.setkey			= cast5_setkey_skcipher,
 		.encrypt		= ctr_crypt,
 		.decrypt		= ctr_crypt,
 	}
 };

 static struct simd_skcipher_alg *cast5_simd_algs[ARRAY_SIZE(cast5_algs)];

 static int __init cast5_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(cast5_algs,
 					      ARRAY_SIZE(cast5_algs),
 					      cast5_simd_algs);
 }

 static void __exit cast5_exit(void)
 {
 	simd_unregister_skciphers(cast5_algs, ARRAY_SIZE(cast5_algs),
 				  cast5_simd_algs);
 }

 module_init(cast5_init);
 module_exit(cast5_exit);

 MODULE_DESCRIPTION("Cast5 Cipher Algorithm, AVX optimized");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_CRYPTO("cast5");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Glue Code for the AVX assembler implementation of the Cast5 Cipher
	*
	* Copyright (C) 2012 Johannes Goetzfried
	* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
	*/

	#include <asm/crypto/glue_helper.h>
	#include <crypto/algapi.h>
	#include <crypto/cast5.h>
	#include <crypto/internal/simd.h>
	#include <linux/crypto.h>
	#include <linux/err.h>
	#include <linux/module.h>
	#include <linux/types.h>

	#define CAST5_PARALLEL_BLOCKS 16

	asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx ctx, u8 dst,
	const u8 *src);
	asmlinkage void cast5_ecb_dec_16way(struct cast5_ctx ctx, u8 dst,
	const u8 *src);
	asmlinkage void cast5_cbc_dec_16way(struct cast5_ctx ctx, u8 dst,
	const u8 *src);
	asmlinkage void cast5_ctr_16way(struct cast5_ctx ctx, u8 dst, const u8 *src,
	__be64 *iv);

	static int cast5_setkey_skcipher(struct crypto_skcipher tfm, const u8 key,
	unsigned int keylen)
	{
	return cast5_setkey(&tfm->base, key, keylen);
	}

	static inline bool cast5_fpu_begin(bool fpu_enabled, struct skcipher_walk *walk,
	unsigned int nbytes)
	{
	return glue_fpu_begin(CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS,
	walk, fpu_enabled, nbytes);
	}

	static inline void cast5_fpu_end(bool fpu_enabled)
	{
	return glue_fpu_end(fpu_enabled);
	}

	static int ecb_crypt(struct skcipher_request *req, bool enc)
	{
	bool fpu_enabled = false;
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	const unsigned int bsize = CAST5_BLOCK_SIZE;
	unsigned int nbytes;
	void (fn)(struct cast5_ctx ctx, u8 dst, const u8 src);
	int err;

	err = skcipher_walk_virt(&walk, req, false);

	while ((nbytes = walk.nbytes)) {
	u8 *wsrc = walk.src.virt.addr;
	u8 *wdst = walk.dst.virt.addr;

	fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);

	/* Process multi-block batch */
	if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
	fn = (enc) ? cast5_ecb_enc_16way : cast5_ecb_dec_16way;
	do {
	fn(ctx, wdst, wsrc);

	wsrc += bsize * CAST5_PARALLEL_BLOCKS;
	wdst += bsize * CAST5_PARALLEL_BLOCKS;
	nbytes -= bsize * CAST5_PARALLEL_BLOCKS;
	} while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);

	if (nbytes < bsize)
	goto done;
	}

	fn = (enc) ? __cast5_encrypt : __cast5_decrypt;

	/* Handle leftovers */
	do {
	fn(ctx, wdst, wsrc);

	wsrc += bsize;
	wdst += bsize;
	nbytes -= bsize;
	} while (nbytes >= bsize);

	done:
	err = skcipher_walk_done(&walk, nbytes);
	}

	cast5_fpu_end(fpu_enabled);
	return err;
	}

	static int ecb_encrypt(struct skcipher_request *req)
	{
	return ecb_crypt(req, true);
	}

	static int ecb_decrypt(struct skcipher_request *req)
	{
	return ecb_crypt(req, false);
	}

	static int cbc_encrypt(struct skcipher_request *req)
	{
	const unsigned int bsize = CAST5_BLOCK_SIZE;
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct cast5_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)) {
	u64 src = (u64 )walk.src.virt.addr;
	u64 dst = (u64 )walk.dst.virt.addr;
	u64 iv = (u64 )walk.iv;

	do {
	dst = src ^ *iv;
	__cast5_encrypt(ctx, (u8 )dst, (u8 )dst);
	iv = dst;
	src++;
	dst++;
	nbytes -= bsize;
	} while (nbytes >= bsize);

	(u64 )walk.iv = *iv;
	err = skcipher_walk_done(&walk, nbytes);
	}

	return err;
	}

	static unsigned int __cbc_decrypt(struct cast5_ctx *ctx,
	struct skcipher_walk *walk)
	{
	const unsigned int bsize = CAST5_BLOCK_SIZE;
	unsigned int nbytes = walk->nbytes;
	u64 src = (u64 )walk->src.virt.addr;
	u64 dst = (u64 )walk->dst.virt.addr;
	u64 last_iv;

	/* Start of the last block. */
	src += nbytes / bsize - 1;
	dst += nbytes / bsize - 1;

	last_iv = *src;

	/* Process multi-block batch */
	if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
	do {
	nbytes -= bsize * (CAST5_PARALLEL_BLOCKS - 1);
	src -= CAST5_PARALLEL_BLOCKS - 1;
	dst -= CAST5_PARALLEL_BLOCKS - 1;

	cast5_cbc_dec_16way(ctx, (u8 )dst, (u8 )src);

	nbytes -= bsize;
	if (nbytes < bsize)
	goto done;

	dst ^= (src - 1);
	src -= 1;
	dst -= 1;
	} while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);
	}

	/* Handle leftovers */
	for (;;) {
	__cast5_decrypt(ctx, (u8 )dst, (u8 )src);

	nbytes -= bsize;
	if (nbytes < bsize)
	break;

	dst ^= (src - 1);
	src -= 1;
	dst -= 1;
	}

	done:
	dst ^= (u64 *)walk->iv;
	(u64 )walk->iv = last_iv;

	return nbytes;
	}

	static int cbc_decrypt(struct skcipher_request *req)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
	bool fpu_enabled = false;
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, false);

	while ((nbytes = walk.nbytes)) {
	fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);
	nbytes = __cbc_decrypt(ctx, &walk);
	err = skcipher_walk_done(&walk, nbytes);
	}

	cast5_fpu_end(fpu_enabled);
	return err;
	}

	static void ctr_crypt_final(struct skcipher_walk walk, struct cast5_ctx ctx)
	{
	u8 *ctrblk = walk->iv;
	u8 keystream[CAST5_BLOCK_SIZE];
	u8 *src = walk->src.virt.addr;
	u8 *dst = walk->dst.virt.addr;
	unsigned int nbytes = walk->nbytes;

	__cast5_encrypt(ctx, keystream, ctrblk);
	crypto_xor_cpy(dst, keystream, src, nbytes);

	crypto_inc(ctrblk, CAST5_BLOCK_SIZE);
	}

	static unsigned int __ctr_crypt(struct skcipher_walk *walk,
	struct cast5_ctx *ctx)
	{
	const unsigned int bsize = CAST5_BLOCK_SIZE;
	unsigned int nbytes = walk->nbytes;
	u64 src = (u64 )walk->src.virt.addr;
	u64 dst = (u64 )walk->dst.virt.addr;

	/* Process multi-block batch */
	if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) {
	do {
	cast5_ctr_16way(ctx, (u8 )dst, (u8 )src,
	(__be64 *)walk->iv);

	src += CAST5_PARALLEL_BLOCKS;
	dst += CAST5_PARALLEL_BLOCKS;
	nbytes -= bsize * CAST5_PARALLEL_BLOCKS;
	} while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS);

	if (nbytes < bsize)
	goto done;
	}

	/* Handle leftovers */
	do {
	u64 ctrblk;

	if (dst != src)
	dst = src;

	ctrblk = (u64 )walk->iv;
	be64_add_cpu((__be64 *)walk->iv, 1);

	__cast5_encrypt(ctx, (u8 )&ctrblk, (u8 )&ctrblk);
	*dst ^= ctrblk;

	src += 1;
	dst += 1;
	nbytes -= bsize;
	} while (nbytes >= bsize);

	done:
	return nbytes;
	}

	static int ctr_crypt(struct skcipher_request *req)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm);
	bool fpu_enabled = false;
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, false);

	while ((nbytes = walk.nbytes) >= CAST5_BLOCK_SIZE) {
	fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes);
	nbytes = __ctr_crypt(&walk, ctx);
	err = skcipher_walk_done(&walk, nbytes);
	}

	cast5_fpu_end(fpu_enabled);

	if (walk.nbytes) {
	ctr_crypt_final(&walk, ctx);
	err = skcipher_walk_done(&walk, 0);
	}

	return err;
	}

	static struct skcipher_alg cast5_algs[] = {
	{
	.base.cra_name = "__ecb(cast5)",
	.base.cra_driver_name = "__ecb-cast5-avx",
	.base.cra_priority = 200,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = CAST5_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct cast5_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = CAST5_MIN_KEY_SIZE,
	.max_keysize = CAST5_MAX_KEY_SIZE,
	.setkey = cast5_setkey_skcipher,
	.encrypt = ecb_encrypt,
	.decrypt = ecb_decrypt,
	}, {
	.base.cra_name = "__cbc(cast5)",
	.base.cra_driver_name = "__cbc-cast5-avx",
	.base.cra_priority = 200,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = CAST5_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct cast5_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = CAST5_MIN_KEY_SIZE,
	.max_keysize = CAST5_MAX_KEY_SIZE,
	.ivsize = CAST5_BLOCK_SIZE,
	.setkey = cast5_setkey_skcipher,
	.encrypt = cbc_encrypt,
	.decrypt = cbc_decrypt,
	}, {
	.base.cra_name = "__ctr(cast5)",
	.base.cra_driver_name = "__ctr-cast5-avx",
	.base.cra_priority = 200,
	.base.cra_flags = CRYPTO_ALG_INTERNAL,
	.base.cra_blocksize = 1,
	.base.cra_ctxsize = sizeof(struct cast5_ctx),
	.base.cra_module = THIS_MODULE,
	.min_keysize = CAST5_MIN_KEY_SIZE,
	.max_keysize = CAST5_MAX_KEY_SIZE,
	.ivsize = CAST5_BLOCK_SIZE,
	.chunksize = CAST5_BLOCK_SIZE,
	.setkey = cast5_setkey_skcipher,
	.encrypt = ctr_crypt,
	.decrypt = ctr_crypt,
	}
	};

	static struct simd_skcipher_alg *cast5_simd_algs[ARRAY_SIZE(cast5_algs)];

	static int __init cast5_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(cast5_algs,
	ARRAY_SIZE(cast5_algs),
	cast5_simd_algs);
	}

	static void __exit cast5_exit(void)
	{
	simd_unregister_skciphers(cast5_algs, ARRAY_SIZE(cast5_algs),
	cast5_simd_algs);
	}

	module_init(cast5_init);
	module_exit(cast5_exit);

	MODULE_DESCRIPTION("Cast5 Cipher Algorithm, AVX optimized");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS_CRYPTO("cast5");