4 files changed, 162 insertions, 487 deletions

diff --git a/arch/x86/crypto/twofish_avx_glue.c b/arch/x86/crypto/twofish_avx_glue.c
index cabe058eba14..782b67ddaf6a 100644
--- a/arch/x86/crypto/twofish_avx_glue.c
+++ b/arch/x86/crypto/twofish_avx_glue.c
@@ -4,9 +4,6 @@
  * Copyright (C) 2012 Johannes Goetzfried
  *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
  *
- * Glue code based on serpent_sse2_glue.c by:
- *  Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
- *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -39,38 +36,21 @@
 #include <asm/i387.h>
 #include <asm/xcr.h>
 #include <asm/xsave.h>
+#include <asm/crypto/twofish.h>
 #include <asm/crypto/ablk_helper.h>
+#include <asm/crypto/glue_helper.h>
 #include <crypto/scatterwalk.h>
 #include <linux/workqueue.h>
 #include <linux/spinlock.h>
 
-
 #define TWOFISH_PARALLEL_BLOCKS 8
 
-/* regular block cipher functions from twofish_x86_64 module */
-asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
-                                const u8 *src);
-asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
-                                const u8 *src);
-
-/* 3-way parallel cipher functions from twofish_x86_64-3way module */
-asmlinkage void __twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
-                                       const u8 *src, bool xor);
-asmlinkage void twofish_dec_blk_3way(struct twofish_ctx *ctx, u8 *dst,
-                                     const u8 *src);
-
 static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
                                         const u8 *src)
 {
         __twofish_enc_blk_3way(ctx, dst, src, false);
 }
 
-static inline void twofish_enc_blk_3way_xor(struct twofish_ctx *ctx, u8 *dst,
-                                            const u8 *src)
-{
-        __twofish_enc_blk_3way(ctx, dst, src, true);
-}
-
 /* 8-way parallel cipher functions */
 asmlinkage void __twofish_enc_blk_8way(struct twofish_ctx *ctx, u8 *dst,
                                        const u8 *src, bool xor);
@@ -95,423 +75,142 @@ static inline void twofish_dec_blk_xway(struct twofish_ctx *ctx, u8 *dst,
         twofish_dec_blk_8way(ctx, dst, src);
 }
 
-
-static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes)
+static void twofish_dec_blk_cbc_xway(void *ctx, u128 *dst, const u128 *src)
 {
-        if (fpu_enabled)
-                return true;
+        u128 ivs[TWOFISH_PARALLEL_BLOCKS - 1];
+        unsigned int j;
 
-        /* AVX is only used when chunk to be processed is large enough, so
-         * do not enable FPU until it is necessary.
-         */
-        if (nbytes < TF_BLOCK_SIZE * TWOFISH_PARALLEL_BLOCKS)
-                return false;
+        for (j = 0; j < TWOFISH_PARALLEL_BLOCKS - 1; j++)
+                ivs[j] = src[j];
 
-        kernel_fpu_begin();
-        return true;
-}
+        twofish_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
 
-static inline void twofish_fpu_end(bool fpu_enabled)
-{
-        if (fpu_enabled)
-                kernel_fpu_end();
+        for (j = 0; j < TWOFISH_PARALLEL_BLOCKS - 1; j++)
+                u128_xor(dst + (j + 1), dst + (j + 1), ivs + j);
 }
 
-static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
-                     bool enc)
+static void twofish_enc_blk_ctr_xway(void *ctx, u128 *dst, const u128 *src,
+                                     u128 *iv)
 {
-        bool fpu_enabled = false;
-        struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-        const unsigned int bsize = TF_BLOCK_SIZE;
-        unsigned int nbytes;
-        int err;
+        be128 ctrblks[TWOFISH_PARALLEL_BLOCKS];
+        unsigned int i;
 
-        err = blkcipher_walk_virt(desc, walk);
-        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+        for (i = 0; i < TWOFISH_PARALLEL_BLOCKS; i++) {
+                if (dst != src)
+                        dst[i] = src[i];
 
-        while ((nbytes = walk->nbytes)) {
-                u8 *wsrc = walk->src.virt.addr;
-                u8 *wdst = walk->dst.virt.addr;
-
-                fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
-
-                /* Process multi-block batch */
-                if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
-                        do {
-                                if (enc)
-                                        twofish_enc_blk_xway(ctx, wdst, wsrc);
-                                else
-                                        twofish_dec_blk_xway(ctx, wdst, wsrc);
-
-                                wsrc += bsize * TWOFISH_PARALLEL_BLOCKS;
-                                wdst += bsize * TWOFISH_PARALLEL_BLOCKS;
-                                nbytes -= bsize * TWOFISH_PARALLEL_BLOCKS;
-                        } while (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS);
-
-                        if (nbytes < bsize)
-                                goto done;
-                }
-
-                /* Process three block batch */
-                if (nbytes >= bsize * 3) {
-                        do {
-                                if (enc)
-                                        twofish_enc_blk_3way(ctx, wdst, wsrc);
-                                else
-                                        twofish_dec_blk_3way(ctx, wdst, wsrc);
-
-                                wsrc += bsize * 3;
-                                wdst += bsize * 3;
-                                nbytes -= bsize * 3;
-                        } while (nbytes >= bsize * 3);
-
-                        if (nbytes < bsize)
-                                goto done;
-                }
-
-                /* Handle leftovers */
-                do {
-                        if (enc)
-                                twofish_enc_blk(ctx, wdst, wsrc);
-                        else
-                                twofish_dec_blk(ctx, wdst, wsrc);
-
-                        wsrc += bsize;
-                        wdst += bsize;
-                        nbytes -= bsize;
-                } while (nbytes >= bsize);
-
-done:
-                err = blkcipher_walk_done(desc, walk, nbytes);
+                u128_to_be128(&ctrblks[i], iv);
+                u128_inc(iv);
         }
 
-        twofish_fpu_end(fpu_enabled);
-        return err;
+        twofish_enc_blk_xway_xor(ctx, (u8 *)dst, (u8 *)ctrblks);
 }
 
+static const struct common_glue_ctx twofish_enc = {
+        .num_funcs = 3,
+        .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+        .funcs = { {
+                .num_blocks = TWOFISH_PARALLEL_BLOCKS,
+                .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_xway) }
+        }, {
+                .num_blocks = 3,
+                .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) }
+        }, {
+                .num_blocks = 1,
+                .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) }
+        } }
+};
+
+static const struct common_glue_ctx twofish_ctr = {
+        .num_funcs = 3,
+        .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+        .funcs = { {
+                .num_blocks = TWOFISH_PARALLEL_BLOCKS,
+                .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_xway) }
+        }, {
+                .num_blocks = 3,
+                .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_3way) }
+        }, {
+                .num_blocks = 1,
+                .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr) }
+        } }
+};
+
+static const struct common_glue_ctx twofish_dec = {
+        .num_funcs = 3,
+        .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+        .funcs = { {
+                .num_blocks = TWOFISH_PARALLEL_BLOCKS,
+                .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_xway) }
+        }, {
+                .num_blocks = 3,
+                .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) }
+        }, {
+                .num_blocks = 1,
+                .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) }
+        } }
+};
+
+static const struct common_glue_ctx twofish_dec_cbc = {
+        .num_funcs = 3,
+        .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+        .funcs = { {
+                .num_blocks = TWOFISH_PARALLEL_BLOCKS,
+                .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_xway) }
+        }, {
+                .num_blocks = 3,
+                .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) }
+        }, {
+                .num_blocks = 1,
+                .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) }
+        } }
+};
+
 static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
 {
-        struct blkcipher_walk walk;
-
-        blkcipher_walk_init(&walk, dst, src, nbytes);
-        return ecb_crypt(desc, &walk, true);
+        return glue_ecb_crypt_128bit(&twofish_enc, desc, dst, src, nbytes);
 }
 
 static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
 {
-        struct blkcipher_walk walk;
-
-        blkcipher_walk_init(&walk, dst, src, nbytes);
-        return ecb_crypt(desc, &walk, false);
-}
-
-static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
-                                  struct blkcipher_walk *walk)
-{
-        struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-        const unsigned int bsize = TF_BLOCK_SIZE;
-        unsigned int nbytes = walk->nbytes;
-        u128 *src = (u128 *)walk->src.virt.addr;
-        u128 *dst = (u128 *)walk->dst.virt.addr;
-        u128 *iv = (u128 *)walk->iv;
-
-        do {
-                u128_xor(dst, src, iv);
-                twofish_enc_blk(ctx, (u8 *)dst, (u8 *)dst);
-                iv = dst;
-
-                src += 1;
-                dst += 1;
-                nbytes -= bsize;
-        } while (nbytes >= bsize);
-
-        u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
-        return nbytes;
+        return glue_ecb_crypt_128bit(&twofish_dec, desc, dst, src, nbytes);
 }
 
 static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
 {
-        struct blkcipher_walk walk;
-        int err;
-
-        blkcipher_walk_init(&walk, dst, src, nbytes);
-        err = blkcipher_walk_virt(desc, &walk);
-
-        while ((nbytes = walk.nbytes)) {
-                nbytes = __cbc_encrypt(desc, &walk);
-                err = blkcipher_walk_done(desc, &walk, nbytes);
-        }
-
-        return err;
-}
-
-static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
-                                  struct blkcipher_walk *walk)
-{
-        struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-        const unsigned int bsize = TF_BLOCK_SIZE;
-        unsigned int nbytes = walk->nbytes;
-        u128 *src = (u128 *)walk->src.virt.addr;
-        u128 *dst = (u128 *)walk->dst.virt.addr;
-        u128 ivs[TWOFISH_PARALLEL_BLOCKS - 1];
-        u128 last_iv;
-        int i;
-
-        /* Start of the last block. */
-        src += nbytes / bsize - 1;
-        dst += nbytes / bsize - 1;
-
-        last_iv = *src;
-
-        /* Process multi-block batch */
-        if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
-                do {
-                        nbytes -= bsize * (TWOFISH_PARALLEL_BLOCKS - 1);
-                        src -= TWOFISH_PARALLEL_BLOCKS - 1;
-                        dst -= TWOFISH_PARALLEL_BLOCKS - 1;
-
-                        for (i = 0; i < TWOFISH_PARALLEL_BLOCKS - 1; i++)
-                                ivs[i] = src[i];
-
-                        twofish_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
-
-                        for (i = 0; i < TWOFISH_PARALLEL_BLOCKS - 1; i++)
-                                u128_xor(dst + (i + 1), dst + (i + 1), ivs + i);
-
-                        nbytes -= bsize;
-                        if (nbytes < bsize)
-                                goto done;
-
-                        u128_xor(dst, dst, src - 1);
-                        src -= 1;
-                        dst -= 1;
-                } while (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS);
-
-                if (nbytes < bsize)
-                        goto done;
-        }
-
-        /* Process three block batch */
-        if (nbytes >= bsize * 3) {
-                do {
-                        nbytes -= bsize * (3 - 1);
-                        src -= 3 - 1;
-                        dst -= 3 - 1;
-
-                        ivs[0] = src[0];
-                        ivs[1] = src[1];
-
-                        twofish_dec_blk_3way(ctx, (u8 *)dst, (u8 *)src);
-
-                        u128_xor(dst + 1, dst + 1, ivs + 0);
-                        u128_xor(dst + 2, dst + 2, ivs + 1);
-
-                        nbytes -= bsize;
-                        if (nbytes < bsize)
-                                goto done;
-
-                        u128_xor(dst, dst, src - 1);
-                        src -= 1;
-                        dst -= 1;
-                } while (nbytes >= bsize * 3);
-
-                if (nbytes < bsize)
-                        goto done;
-        }
-
-        /* Handle leftovers */
-        for (;;) {
-                twofish_dec_blk(ctx, (u8 *)dst, (u8 *)src);
-
-                nbytes -= bsize;
-                if (nbytes < bsize)
-                        break;
-
-                u128_xor(dst, dst, src - 1);
-                src -= 1;
-                dst -= 1;
-        }
-
-done:
-        u128_xor(dst, dst, (u128 *)walk->iv);
-        *(u128 *)walk->iv = last_iv;
-
-        return nbytes;
+        return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(twofish_enc_blk), desc,
+                                       dst, src, nbytes);
 }
 
 static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
 {
-        bool fpu_enabled = false;
-        struct blkcipher_walk walk;
-        int err;
-
-        blkcipher_walk_init(&walk, dst, src, nbytes);
-        err = blkcipher_walk_virt(desc, &walk);
-        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
-
-        while ((nbytes = walk.nbytes)) {
-                fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
-                nbytes = __cbc_decrypt(desc, &walk);
-                err = blkcipher_walk_done(desc, &walk, nbytes);
-        }
-
-        twofish_fpu_end(fpu_enabled);
-        return err;
-}
-
-static inline void u128_to_be128(be128 *dst, const u128 *src)
-{
-        dst->a = cpu_to_be64(src->a);
-        dst->b = cpu_to_be64(src->b);
+        return glue_cbc_decrypt_128bit(&twofish_dec_cbc, desc, dst, src,
+                                       nbytes);
 }
 
-static inline void be128_to_u128(u128 *dst, const be128 *src)
-{
-        dst->a = be64_to_cpu(src->a);
-        dst->b = be64_to_cpu(src->b);
-}
-
-static inline void u128_inc(u128 *i)
+static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+                     struct scatterlist *src, unsigned int nbytes)
 {
-        i->b++;
-        if (!i->b)
-                i->a++;
+        return glue_ctr_crypt_128bit(&twofish_ctr, desc, dst, src, nbytes);
 }
 
-static void ctr_crypt_final(struct blkcipher_desc *desc,
-                            struct blkcipher_walk *walk)
+static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes)
 {
-        struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-        u8 *ctrblk = walk->iv;
-        u8 keystream[TF_BLOCK_SIZE];
-        u8 *src = walk->src.virt.addr;
-        u8 *dst = walk->dst.virt.addr;
-        unsigned int nbytes = walk->nbytes;
-
-        twofish_enc_blk(ctx, keystream, ctrblk);
-        crypto_xor(keystream, src, nbytes);
-        memcpy(dst, keystream, nbytes);
-
-        crypto_inc(ctrblk, TF_BLOCK_SIZE);
+        return glue_fpu_begin(TF_BLOCK_SIZE, TWOFISH_PARALLEL_BLOCKS, NULL,
+                              fpu_enabled, nbytes);
 }
 
-static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
-                                struct blkcipher_walk *walk)
-{
-        struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-        const unsigned int bsize = TF_BLOCK_SIZE;
-        unsigned int nbytes = walk->nbytes;
-        u128 *src = (u128 *)walk->src.virt.addr;
-        u128 *dst = (u128 *)walk->dst.virt.addr;
-        u128 ctrblk;
-        be128 ctrblocks[TWOFISH_PARALLEL_BLOCKS];
-        int i;
-
-        be128_to_u128(&ctrblk, (be128 *)walk->iv);
-
-        /* Process multi-block batch */
-        if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
-                do {
-                        /* create ctrblks for parallel encrypt */
-                        for (i = 0; i < TWOFISH_PARALLEL_BLOCKS; i++) {
-                                if (dst != src)
-                                        dst[i] = src[i];
-
-                                u128_to_be128(&ctrblocks[i], &ctrblk);
-                                u128_inc(&ctrblk);
-                        }
-
-                        twofish_enc_blk_xway_xor(ctx, (u8 *)dst,
-                                                 (u8 *)ctrblocks);
-
-                        src += TWOFISH_PARALLEL_BLOCKS;
-                        dst += TWOFISH_PARALLEL_BLOCKS;
-                        nbytes -= bsize * TWOFISH_PARALLEL_BLOCKS;
-                } while (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS);
-
-                if (nbytes < bsize)
-                        goto done;
-        }
-
-        /* Process three block batch */
-        if (nbytes >= bsize * 3) {
-                do {
-                        if (dst != src) {
-                                dst[0] = src[0];
-                                dst[1] = src[1];
-                                dst[2] = src[2];
-                        }
-
-                        /* create ctrblks for parallel encrypt */
-                        u128_to_be128(&ctrblocks[0], &ctrblk);
-                        u128_inc(&ctrblk);
-                        u128_to_be128(&ctrblocks[1], &ctrblk);
-                        u128_inc(&ctrblk);
-                        u128_to_be128(&ctrblocks[2], &ctrblk);
-                        u128_inc(&ctrblk);
-
-                        twofish_enc_blk_3way_xor(ctx, (u8 *)dst,
-                                                 (u8 *)ctrblocks);
-
-                        src += 3;
-                        dst += 3;
-                        nbytes -= bsize * 3;
-                } while (nbytes >= bsize * 3);
-
-                if (nbytes < bsize)
-                        goto done;
-        }
-
-        /* Handle leftovers */
-        do {
-                if (dst != src)
-                        *dst = *src;
-
-                u128_to_be128(&ctrblocks[0], &ctrblk);
-                u128_inc(&ctrblk);
-
-                twofish_enc_blk(ctx, (u8 *)ctrblocks, (u8 *)ctrblocks);
-                u128_xor(dst, dst, (u128 *)ctrblocks);
-
-                src += 1;
-                dst += 1;
-                nbytes -= bsize;
-        } while (nbytes >= bsize);
-
-done:
-        u128_to_be128((be128 *)walk->iv, &ctrblk);
-        return nbytes;
-}
-
-static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-                     struct scatterlist *src, unsigned int nbytes)
+static inline void twofish_fpu_end(bool fpu_enabled)
 {
-        bool fpu_enabled = false;
-        struct blkcipher_walk walk;
-        int err;
-
-        blkcipher_walk_init(&walk, dst, src, nbytes);
-        err = blkcipher_walk_virt_block(desc, &walk, TF_BLOCK_SIZE);
-        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
-
-        while ((nbytes = walk.nbytes) >= TF_BLOCK_SIZE) {
-                fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
-                nbytes = __ctr_crypt(desc, &walk);
-                err = blkcipher_walk_done(desc, &walk, nbytes);
-        }
-
-        twofish_fpu_end(fpu_enabled);
-
-        if (walk.nbytes) {
-                ctr_crypt_final(desc, &walk);
-                err = blkcipher_walk_done(desc, &walk, 0);
-        }
-
-        return err;
+        glue_fpu_end(fpu_enabled);
 }
 
 struct crypt_priv {
@@ -563,26 +262,6 @@ static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
                 twofish_dec_blk(ctx->ctx, srcdst, srcdst);
 }
 
-struct twofish_lrw_ctx {
-        struct lrw_table_ctx lrw_table;
-        struct twofish_ctx twofish_ctx;
-};
-
-static int lrw_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
-                              unsigned int keylen)
-{
-        struct twofish_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
-        int err;
-
-        err = __twofish_setkey(&ctx->twofish_ctx, key,
-                                keylen - TF_BLOCK_SIZE, &tfm->crt_flags);
-        if (err)
-                return err;
-
-        return lrw_init_table(&ctx->lrw_table, key + keylen -
-                                                TF_BLOCK_SIZE);
-}
-
 static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
 {
@@ -635,43 +314,6 @@ static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
         return ret;
 }
 
-static void lrw_exit_tfm(struct crypto_tfm *tfm)
-{
-        struct twofish_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
-
-        lrw_free_table(&ctx->lrw_table);
-}
-
-struct twofish_xts_ctx {
-        struct twofish_ctx tweak_ctx;
-        struct twofish_ctx crypt_ctx;
-};
-
-static int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
-                              unsigned int keylen)
-{
-        struct twofish_xts_ctx *ctx = crypto_tfm_ctx(tfm);
-        u32 *flags = &tfm->crt_flags;
-        int err;
-
-        /* key consists of keys of equal size concatenated, therefore
-         * the length must be even
-         */
-        if (keylen % 2) {
-                *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
-                return -EINVAL;
-        }
-
-        /* first half of xts-key is for crypt */
-        err = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
-        if (err)
-                return err;
-
-        /* second half of xts-key is for tweak */
-        return __twofish_setkey(&ctx->tweak_ctx,
-                                key + keylen / 2, keylen / 2, flags);
-}
-
 static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
 {
@@ -798,7 +440,7 @@ static struct crypto_alg twofish_algs[10] = { {
         .cra_type               = &crypto_blkcipher_type,
         .cra_module             = THIS_MODULE,
         .cra_list               = LIST_HEAD_INIT(twofish_algs[3].cra_list),
-        .cra_exit               = lrw_exit_tfm,
+        .cra_exit               = lrw_twofish_exit_tfm,
         .cra_u = {
                 .blkcipher = {
                         .min_keysize    = TF_MIN_KEY_SIZE +
diff --git a/arch/x86/crypto/twofish_glue_3way.c b/arch/x86/crypto/twofish_glue_3way.c
index 25bf5e9b0067..15f9347316c8 100644
--- a/arch/x86/crypto/twofish_glue_3way.c
+++ b/arch/x86/crypto/twofish_glue_3way.c
@@ -28,22 +28,12 @@
 #include <crypto/algapi.h>
 #include <crypto/twofish.h>
 #include <crypto/b128ops.h>
+#include <asm/crypto/twofish.h>
 #include <asm/crypto/glue_helper.h>
 #include <crypto/lrw.h>
 #include <crypto/xts.h>
 
-/* regular block cipher functions from twofish_x86_64 module */
-asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
-                                const u8 *src);
-asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
-                                const u8 *src);
-
-/* 3-way parallel cipher functions */
-asmlinkage void __twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
-                                       const u8 *src, bool xor);
 EXPORT_SYMBOL_GPL(__twofish_enc_blk_3way);
-asmlinkage void twofish_dec_blk_3way(struct twofish_ctx *ctx, u8 *dst,
-                                     const u8 *src);
 EXPORT_SYMBOL_GPL(twofish_dec_blk_3way);
 
 static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
@@ -58,7 +48,7 @@ static inline void twofish_enc_blk_xor_3way(struct twofish_ctx *ctx, u8 *dst,
         __twofish_enc_blk_3way(ctx, dst, src, true);
 }
 
-static void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src)
+void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src)
 {
         u128 ivs[2];
 
@@ -70,8 +60,9 @@ static void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src)
         u128_xor(&dst[1], &dst[1], &ivs[0]);
         u128_xor(&dst[2], &dst[2], &ivs[1]);
 }
+EXPORT_SYMBOL_GPL(twofish_dec_blk_cbc_3way);
 
-static void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv)
+void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv)
 {
         be128 ctrblk;
 
@@ -84,8 +75,9 @@ static void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv)
         twofish_enc_blk(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
         u128_xor(dst, dst, (u128 *)&ctrblk);
 }
+EXPORT_SYMBOL_GPL(twofish_enc_blk_ctr);
 
-static void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
+void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
                                      u128 *iv)
 {
         be128 ctrblks[3];
@@ -105,6 +97,7 @@ static void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
 
         twofish_enc_blk_xor_3way(ctx, (u8 *)dst, (u8 *)ctrblks);
 }
+EXPORT_SYMBOL_GPL(twofish_enc_blk_ctr_3way);
 
 static const struct common_glue_ctx twofish_enc = {
         .num_funcs = 2,
@@ -220,13 +213,8 @@ static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
                 twofish_dec_blk(ctx, srcdst, srcdst);
 }
 
-struct twofish_lrw_ctx {
-        struct lrw_table_ctx lrw_table;
-        struct twofish_ctx twofish_ctx;
-};
-
-static int lrw_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
-                              unsigned int keylen)
+int lrw_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
+                       unsigned int keylen)
 {
         struct twofish_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
         int err;
@@ -238,6 +226,7 @@ static int lrw_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
 
         return lrw_init_table(&ctx->lrw_table, key + keylen - TF_BLOCK_SIZE);
 }
+EXPORT_SYMBOL_GPL(lrw_twofish_setkey);
 
 static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
@@ -273,20 +262,16 @@ static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
         return lrw_crypt(desc, dst, src, nbytes, &req);
 }
 
-static void lrw_exit_tfm(struct crypto_tfm *tfm)
+void lrw_twofish_exit_tfm(struct crypto_tfm *tfm)
 {
         struct twofish_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
 
         lrw_free_table(&ctx->lrw_table);
 }
+EXPORT_SYMBOL_GPL(lrw_twofish_exit_tfm);
 
-struct twofish_xts_ctx {
-        struct twofish_ctx tweak_ctx;
-        struct twofish_ctx crypt_ctx;
-};
-
-static int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
-                              unsigned int keylen)
+int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
+                       unsigned int keylen)
 {
         struct twofish_xts_ctx *ctx = crypto_tfm_ctx(tfm);
         u32 *flags = &tfm->crt_flags;
@@ -309,6 +294,7 @@ static int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
         return __twofish_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
                                 flags);
 }
+EXPORT_SYMBOL_GPL(xts_twofish_setkey);
 
 static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                        struct scatterlist *src, unsigned int nbytes)
@@ -419,7 +405,7 @@ static struct crypto_alg tf_algs[5] = { {
         .cra_type               = &crypto_blkcipher_type,
         .cra_module             = THIS_MODULE,
         .cra_list               = LIST_HEAD_INIT(tf_algs[3].cra_list),
-        .cra_exit               = lrw_exit_tfm,
+        .cra_exit               = lrw_twofish_exit_tfm,
         .cra_u = {
                 .blkcipher = {
                         .min_keysize    = TF_MIN_KEY_SIZE + TF_BLOCK_SIZE,
diff --git a/arch/x86/include/asm/crypto/twofish.h b/arch/x86/include/asm/crypto/twofish.h
new file mode 100644
index 000000000000..9d2c514bd5f9
--- /dev/null
+++ b/arch/x86/include/asm/crypto/twofish.h
@@ -0,0 +1,46 @@
+#ifndef ASM_X86_TWOFISH_H
+#define ASM_X86_TWOFISH_H
+
+#include <linux/crypto.h>
+#include <crypto/twofish.h>
+#include <crypto/lrw.h>
+#include <crypto/b128ops.h>
+
+struct twofish_lrw_ctx {
+        struct lrw_table_ctx lrw_table;
+        struct twofish_ctx twofish_ctx;
+};
+
+struct twofish_xts_ctx {
+        struct twofish_ctx tweak_ctx;
+        struct twofish_ctx crypt_ctx;
+};
+
+/* regular block cipher functions from twofish_x86_64 module */
+asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
+                                const u8 *src);
+asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
+                                const u8 *src);
+
+/* 3-way parallel cipher functions */
+asmlinkage void __twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
+                                       const u8 *src, bool xor);
+asmlinkage void twofish_dec_blk_3way(struct twofish_ctx *ctx, u8 *dst,
+                                     const u8 *src);
+
+/* helpers from twofish_x86_64-3way module */
+extern void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src);
+extern void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src,
+                                u128 *iv);
+extern void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
+                                     u128 *iv);
+
+extern int lrw_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
+                              unsigned int keylen);
+
+extern void lrw_twofish_exit_tfm(struct crypto_tfm *tfm);
+
+extern int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
+                              unsigned int keylen);
+
+#endif /* ASM_X86_TWOFISH_H */
diff --git a/crypto/Kconfig b/crypto/Kconfig
index fc559caaa9ad..02e303774691 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -958,6 +958,7 @@ config CRYPTO_TWOFISH_AVX_X86_64
         select CRYPTO_ALGAPI
         select CRYPTO_CRYPTD
         select CRYPTO_ABLK_HELPER_X86
+        select CRYPTO_GLUE_HELPER_X86
         select CRYPTO_TWOFISH_COMMON
         select CRYPTO_TWOFISH_X86_64
         select CRYPTO_TWOFISH_X86_64_3WAY