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-rw-r--r--arch/x86/crypto/twofish_avx_glue.c624
1 files changed, 624 insertions, 0 deletions
diff --git a/arch/x86/crypto/twofish_avx_glue.c b/arch/x86/crypto/twofish_avx_glue.c
new file mode 100644
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+++ b/arch/x86/crypto/twofish_avx_glue.c
@@ -0,0 +1,624 @@
+/*
+ * Glue Code for AVX assembler version of Twofish Cipher
+ *
+ * Copyright (C) 2012 Johannes Goetzfried
+ * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
+ *
+ * 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
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/hardirq.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/twofish.h>
+#include <crypto/cryptd.h>
+#include <crypto/b128ops.h>
+#include <crypto/ctr.h>
+#include <crypto/lrw.h>
+#include <crypto/xts.h>
+#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
+
+static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_3way(ctx, dst, src, false);
+}
+
+/* 8-way parallel cipher functions */
+asmlinkage void __twofish_enc_blk_8way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src, bool xor);
+asmlinkage void twofish_dec_blk_8way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src);
+
+static inline void twofish_enc_blk_xway(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_8way(ctx, dst, src, false);
+}
+
+static inline void twofish_enc_blk_xway_xor(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_8way(ctx, dst, src, true);
+}
+
+static inline void twofish_dec_blk_xway(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ twofish_dec_blk_8way(ctx, dst, src);
+}
+
+static void twofish_dec_blk_cbc_xway(void *ctx, u128 *dst, const u128 *src)
+{
+ u128 ivs[TWOFISH_PARALLEL_BLOCKS - 1];
+ unsigned int j;
+
+ for (j = 0; j < TWOFISH_PARALLEL_BLOCKS - 1; j++)
+ ivs[j] = src[j];
+
+ twofish_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
+
+ for (j = 0; j < TWOFISH_PARALLEL_BLOCKS - 1; j++)
+ u128_xor(dst + (j + 1), dst + (j + 1), ivs + j);
+}
+
+static void twofish_enc_blk_ctr_xway(void *ctx, u128 *dst, const u128 *src,
+ u128 *iv)
+{
+ be128 ctrblks[TWOFISH_PARALLEL_BLOCKS];
+ unsigned int i;
+
+ for (i = 0; i < TWOFISH_PARALLEL_BLOCKS; i++) {
+ if (dst != src)
+ dst[i] = src[i];
+
+ u128_to_be128(&ctrblks[i], iv);
+ u128_inc(iv);
+ }
+
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ 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)
+{
+ return glue_cbc_decrypt_128bit(&twofish_dec_cbc, desc, dst, src,
+ nbytes);
+}
+
+static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ return glue_ctr_crypt_128bit(&twofish_ctr, desc, dst, src, nbytes);
+}
+
+static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes)
+{
+ return glue_fpu_begin(TF_BLOCK_SIZE, TWOFISH_PARALLEL_BLOCKS, NULL,
+ fpu_enabled, nbytes);
+}
+
+static inline void twofish_fpu_end(bool fpu_enabled)
+{
+ glue_fpu_end(fpu_enabled);
+}
+
+struct crypt_priv {
+ struct twofish_ctx *ctx;
+ bool fpu_enabled;
+};
+
+static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
+{
+ const unsigned int bsize = TF_BLOCK_SIZE;
+ struct crypt_priv *ctx = priv;
+ int i;
+
+ ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes);
+
+ if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) {
+ twofish_enc_blk_xway(ctx->ctx, srcdst, srcdst);
+ return;
+ }
+
+ for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3)
+ twofish_enc_blk_3way(ctx->ctx, srcdst, srcdst);
+
+ nbytes %= bsize * 3;
+
+ for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
+ twofish_enc_blk(ctx->ctx, srcdst, srcdst);
+}
+
+static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
+{
+ const unsigned int bsize = TF_BLOCK_SIZE;
+ struct crypt_priv *ctx = priv;
+ int i;
+
+ ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes);
+
+ if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) {
+ twofish_dec_blk_xway(ctx->ctx, srcdst, srcdst);
+ return;
+ }
+
+ for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3)
+ twofish_dec_blk_3way(ctx->ctx, srcdst, srcdst);
+
+ nbytes %= bsize * 3;
+
+ for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
+ twofish_dec_blk(ctx->ctx, srcdst, srcdst);
+}
+
+static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[TWOFISH_PARALLEL_BLOCKS];
+ struct crypt_priv crypt_ctx = {
+ .ctx = &ctx->twofish_ctx,
+ .fpu_enabled = false,
+ };
+ struct lrw_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .table_ctx = &ctx->lrw_table,
+ .crypt_ctx = &crypt_ctx,
+ .crypt_fn = encrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
+ twofish_fpu_end(crypt_ctx.fpu_enabled);
+
+ return ret;
+}
+
+static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[TWOFISH_PARALLEL_BLOCKS];
+ struct crypt_priv crypt_ctx = {
+ .ctx = &ctx->twofish_ctx,
+ .fpu_enabled = false,
+ };
+ struct lrw_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .table_ctx = &ctx->lrw_table,
+ .crypt_ctx = &crypt_ctx,
+ .crypt_fn = decrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
+ twofish_fpu_end(crypt_ctx.fpu_enabled);
+
+ return ret;
+}
+
+static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[TWOFISH_PARALLEL_BLOCKS];
+ struct crypt_priv crypt_ctx = {
+ .ctx = &ctx->crypt_ctx,
+ .fpu_enabled = false,
+ };
+ struct xts_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .tweak_ctx = &ctx->tweak_ctx,
+ .tweak_fn = XTS_TWEAK_CAST(twofish_enc_blk),
+ .crypt_ctx = &crypt_ctx,
+ .crypt_fn = encrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+ ret = xts_crypt(desc, dst, src, nbytes, &req);
+ twofish_fpu_end(crypt_ctx.fpu_enabled);
+
+ return ret;
+}
+
+static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[TWOFISH_PARALLEL_BLOCKS];
+ struct crypt_priv crypt_ctx = {
+ .ctx = &ctx->crypt_ctx,
+ .fpu_enabled = false,
+ };
+ struct xts_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .tweak_ctx = &ctx->tweak_ctx,
+ .tweak_fn = XTS_TWEAK_CAST(twofish_enc_blk),
+ .crypt_ctx = &crypt_ctx,
+ .crypt_fn = decrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+ ret = xts_crypt(desc, dst, src, nbytes, &req);
+ twofish_fpu_end(crypt_ctx.fpu_enabled);
+
+ return ret;
+}
+
+static struct crypto_alg twofish_algs[10] = { {
+ .cra_name = "__ecb-twofish-avx",
+ .cra_driver_name = "__driver-ecb-twofish-avx",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct twofish_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[0].cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE,
+ .setkey = twofish_setkey,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__cbc-twofish-avx",
+ .cra_driver_name = "__driver-cbc-twofish-avx",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct twofish_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[1].cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE,
+ .setkey = twofish_setkey,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__ctr-twofish-avx",
+ .cra_driver_name = "__driver-ctr-twofish-avx",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct twofish_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[2].cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = twofish_setkey,
+ .encrypt = ctr_crypt,
+ .decrypt = ctr_crypt,
+ },
+ },
+}, {
+ .cra_name = "__lrw-twofish-avx",
+ .cra_driver_name = "__driver-lrw-twofish-avx",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct twofish_lrw_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[3].cra_list),
+ .cra_exit = lrw_twofish_exit_tfm,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE +
+ TF_BLOCK_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE +
+ TF_BLOCK_SIZE,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = lrw_twofish_setkey,
+ .encrypt = lrw_encrypt,
+ .decrypt = lrw_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__xts-twofish-avx",
+ .cra_driver_name = "__driver-xts-twofish-avx",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct twofish_xts_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[4].cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE * 2,
+ .max_keysize = TF_MAX_KEY_SIZE * 2,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = xts_twofish_setkey,
+ .encrypt = xts_encrypt,
+ .decrypt = xts_decrypt,
+ },
+ },
+}, {
+ .cra_name = "ecb(twofish)",
+ .cra_driver_name = "ecb-twofish-avx",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[5].cra_list),
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "cbc(twofish)",
+ .cra_driver_name = "cbc-twofish-avx",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[6].cra_list),
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = __ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "ctr(twofish)",
+ .cra_driver_name = "ctr-twofish-avx",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[7].cra_list),
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_encrypt,
+ .geniv = "chainiv",
+ },
+ },
+}, {
+ .cra_name = "lrw(twofish)",
+ .cra_driver_name = "lrw-twofish-avx",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[8].cra_list),
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE +
+ TF_BLOCK_SIZE,
+ .max_keysize = TF_MAX_KEY_SIZE +
+ TF_BLOCK_SIZE,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "xts(twofish)",
+ .cra_driver_name = "xts-twofish-avx",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = TF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(twofish_algs[9].cra_list),
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = TF_MIN_KEY_SIZE * 2,
+ .max_keysize = TF_MAX_KEY_SIZE * 2,
+ .ivsize = TF_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+} };
+
+static int __init twofish_init(void)
+{
+ u64 xcr0;
+
+ if (!cpu_has_avx || !cpu_has_osxsave) {
+ printk(KERN_INFO "AVX instructions are not detected.\n");
+ return -ENODEV;
+ }
+
+ xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
+ if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) {
+ printk(KERN_INFO "AVX detected but unusable.\n");
+ return -ENODEV;
+ }
+
+ return crypto_register_algs(twofish_algs, ARRAY_SIZE(twofish_algs));
+}
+
+static void __exit twofish_exit(void)
+{
+ crypto_unregister_algs(twofish_algs, ARRAY_SIZE(twofish_algs));
+}
+
+module_init(twofish_init);
+module_exit(twofish_exit);
+
+MODULE_DESCRIPTION("Twofish Cipher Algorithm, AVX optimized");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("twofish");