diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-02 21:53:12 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-02 21:53:12 (GMT) |
commit | 797994f81a8b2bdca2eecffa415c1e7a89a4f961 (patch) | |
tree | 1383dc469c26ad37fdf960f682d9a48c782935c5 /arch/x86/crypto/serpent_avx2_glue.c | |
parent | c8d8566952fda026966784a62f324c8352f77430 (diff) | |
parent | 3862de1f6c442d53bd828d39f86d07d933a70605 (diff) | |
download | linux-fsl-qoriq-797994f81a8b2bdca2eecffa415c1e7a89a4f961.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
- XTS mode optimisation for twofish/cast6/camellia/aes on x86
- AVX2/x86_64 implementation for blowfish/twofish/serpent/camellia
- SSSE3/AVX/AVX2 optimisations for sha256/sha512
- Added driver for SAHARA2 crypto accelerator
- Fix for GMAC when used in non-IPsec secnarios
- Added generic CMAC implementation (including IPsec glue)
- IP update for crypto/atmel
- Support for more than one device in hwrng/timeriomem
- Added Broadcom BCM2835 RNG driver
- Misc fixes
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (59 commits)
crypto: caam - fix job ring cleanup code
crypto: camellia - add AVX2/AES-NI/x86_64 assembler implementation of camellia cipher
crypto: serpent - add AVX2/x86_64 assembler implementation of serpent cipher
crypto: twofish - add AVX2/x86_64 assembler implementation of twofish cipher
crypto: blowfish - add AVX2/x86_64 implementation of blowfish cipher
crypto: tcrypt - add async cipher speed tests for blowfish
crypto: testmgr - extend camellia test-vectors for camellia-aesni/avx2
crypto: aesni_intel - fix Kconfig problem with CRYPTO_GLUE_HELPER_X86
crypto: aesni_intel - add more optimized XTS mode for x86-64
crypto: x86/camellia-aesni-avx - add more optimized XTS code
crypto: cast6-avx: use new optimized XTS code
crypto: x86/twofish-avx - use optimized XTS code
crypto: x86 - add more optimized XTS-mode for serpent-avx
xfrm: add rfc4494 AES-CMAC-96 support
crypto: add CMAC support to CryptoAPI
crypto: testmgr - add empty test vectors for null ciphers
crypto: testmgr - add AES GMAC test vectors
crypto: gcm - fix rfc4543 to handle async crypto correctly
crypto: gcm - make GMAC work when dst and src are different
hwrng: timeriomem - added devicetree hooks
...
Diffstat (limited to 'arch/x86/crypto/serpent_avx2_glue.c')
-rw-r--r-- | arch/x86/crypto/serpent_avx2_glue.c | 562 |
1 files changed, 562 insertions, 0 deletions
diff --git a/arch/x86/crypto/serpent_avx2_glue.c b/arch/x86/crypto/serpent_avx2_glue.c new file mode 100644 index 0000000..23aabc6 --- /dev/null +++ b/arch/x86/crypto/serpent_avx2_glue.c @@ -0,0 +1,562 @@ +/* + * Glue Code for x86_64/AVX2 assembler optimized version of Serpent + * + * Copyright © 2012-2013 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 + * (at your option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/crypto.h> +#include <linux/err.h> +#include <crypto/algapi.h> +#include <crypto/ctr.h> +#include <crypto/lrw.h> +#include <crypto/xts.h> +#include <crypto/serpent.h> +#include <asm/xcr.h> +#include <asm/xsave.h> +#include <asm/crypto/serpent-avx.h> +#include <asm/crypto/ablk_helper.h> +#include <asm/crypto/glue_helper.h> + +#define SERPENT_AVX2_PARALLEL_BLOCKS 16 + +/* 16-way AVX2 parallel cipher functions */ +asmlinkage void serpent_ecb_enc_16way(struct serpent_ctx *ctx, u8 *dst, + const u8 *src); +asmlinkage void serpent_ecb_dec_16way(struct serpent_ctx *ctx, u8 *dst, + const u8 *src); +asmlinkage void serpent_cbc_dec_16way(void *ctx, u128 *dst, const u128 *src); + +asmlinkage void serpent_ctr_16way(void *ctx, u128 *dst, const u128 *src, + le128 *iv); +asmlinkage void serpent_xts_enc_16way(struct serpent_ctx *ctx, u8 *dst, + const u8 *src, le128 *iv); +asmlinkage void serpent_xts_dec_16way(struct serpent_ctx *ctx, u8 *dst, + const u8 *src, le128 *iv); + +static const struct common_glue_ctx serpent_enc = { + .num_funcs = 3, + .fpu_blocks_limit = 8, + + .funcs = { { + .num_blocks = 16, + .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_16way) } + }, { + .num_blocks = 8, + .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 = 3, + .fpu_blocks_limit = 8, + + .funcs = { { + .num_blocks = 16, + .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_16way) } + }, { + .num_blocks = 8, + .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 = 3, + .fpu_blocks_limit = 8, + + .funcs = { { + .num_blocks = 16, + .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_16way) } + }, { + .num_blocks = 8, + .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 = 3, + .fpu_blocks_limit = 8, + + .funcs = { { + .num_blocks = 16, + .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_16way) } + }, { + .num_blocks = 8, + .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 = 3, + .fpu_blocks_limit = 8, + + .funcs = { { + .num_blocks = 16, + .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_16way) } + }, { + .num_blocks = 8, + .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 = 3, + .fpu_blocks_limit = 8, + + .funcs = { { + .num_blocks = 16, + .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_16way) } + }, { + .num_blocks = 8, + .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 blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) +{ + return glue_ecb_crypt_128bit(&serpent_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(&serpent_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(__serpent_encrypt), 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(&serpent_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(&serpent_ctr, desc, dst, src, nbytes); +} + +static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes) +{ + /* since reusing AVX functions, starts using FPU at 8 parallel blocks */ + return glue_fpu_begin(SERPENT_BLOCK_SIZE, 8, NULL, fpu_enabled, nbytes); +} + +static inline void serpent_fpu_end(bool fpu_enabled) +{ + glue_fpu_end(fpu_enabled); +} + +struct crypt_priv { + struct serpent_ctx *ctx; + bool fpu_enabled; +}; + +static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) +{ + const unsigned int bsize = SERPENT_BLOCK_SIZE; + struct crypt_priv *ctx = priv; + int i; + + ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); + + if (nbytes >= SERPENT_AVX2_PARALLEL_BLOCKS * bsize) { + serpent_ecb_enc_16way(ctx->ctx, srcdst, srcdst); + srcdst += bsize * SERPENT_AVX2_PARALLEL_BLOCKS; + nbytes -= bsize * SERPENT_AVX2_PARALLEL_BLOCKS; + } + + while (nbytes >= SERPENT_PARALLEL_BLOCKS * bsize) { + serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst); + srcdst += bsize * SERPENT_PARALLEL_BLOCKS; + nbytes -= bsize * SERPENT_PARALLEL_BLOCKS; + } + + for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) + __serpent_encrypt(ctx->ctx, srcdst, srcdst); +} + +static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) +{ + const unsigned int bsize = SERPENT_BLOCK_SIZE; + struct crypt_priv *ctx = priv; + int i; + + ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); + + if (nbytes >= SERPENT_AVX2_PARALLEL_BLOCKS * bsize) { + serpent_ecb_dec_16way(ctx->ctx, srcdst, srcdst); + srcdst += bsize * SERPENT_AVX2_PARALLEL_BLOCKS; + nbytes -= bsize * SERPENT_AVX2_PARALLEL_BLOCKS; + } + + while (nbytes >= SERPENT_PARALLEL_BLOCKS * bsize) { + serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst); + srcdst += bsize * SERPENT_PARALLEL_BLOCKS; + nbytes -= bsize * SERPENT_PARALLEL_BLOCKS; + } + + for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) + __serpent_decrypt(ctx->ctx, srcdst, srcdst); +} + +static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) +{ + struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + be128 buf[SERPENT_AVX2_PARALLEL_BLOCKS]; + struct crypt_priv crypt_ctx = { + .ctx = &ctx->serpent_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); + serpent_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 serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + be128 buf[SERPENT_AVX2_PARALLEL_BLOCKS]; + struct crypt_priv crypt_ctx = { + .ctx = &ctx->serpent_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); + serpent_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 serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + + return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes, + XTS_TWEAK_CAST(__serpent_encrypt), + &ctx->tweak_ctx, &ctx->crypt_ctx); +} + +static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) +{ + struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + + return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes, + XTS_TWEAK_CAST(__serpent_encrypt), + &ctx->tweak_ctx, &ctx->crypt_ctx); +} + +static struct crypto_alg srp_algs[10] = { { + .cra_name = "__ecb-serpent-avx2", + .cra_driver_name = "__driver-ecb-serpent-avx2", + .cra_priority = 0, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = SERPENT_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct serpent_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(srp_algs[0].cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE, + .setkey = serpent_setkey, + .encrypt = ecb_encrypt, + .decrypt = ecb_decrypt, + }, + }, +}, { + .cra_name = "__cbc-serpent-avx2", + .cra_driver_name = "__driver-cbc-serpent-avx2", + .cra_priority = 0, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = SERPENT_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct serpent_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(srp_algs[1].cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE, + .setkey = serpent_setkey, + .encrypt = cbc_encrypt, + .decrypt = cbc_decrypt, + }, + }, +}, { + .cra_name = "__ctr-serpent-avx2", + .cra_driver_name = "__driver-ctr-serpent-avx2", + .cra_priority = 0, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = 1, + .cra_ctxsize = sizeof(struct serpent_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(srp_algs[2].cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = serpent_setkey, + .encrypt = ctr_crypt, + .decrypt = ctr_crypt, + }, + }, +}, { + .cra_name = "__lrw-serpent-avx2", + .cra_driver_name = "__driver-lrw-serpent-avx2", + .cra_priority = 0, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = SERPENT_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct serpent_lrw_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(srp_algs[3].cra_list), + .cra_exit = lrw_serpent_exit_tfm, + .cra_u = { + .blkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE + + SERPENT_BLOCK_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE + + SERPENT_BLOCK_SIZE, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = lrw_serpent_setkey, + .encrypt = lrw_encrypt, + .decrypt = lrw_decrypt, + }, + }, +}, { + .cra_name = "__xts-serpent-avx2", + .cra_driver_name = "__driver-xts-serpent-avx2", + .cra_priority = 0, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = SERPENT_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct serpent_xts_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(srp_algs[4].cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE * 2, + .max_keysize = SERPENT_MAX_KEY_SIZE * 2, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = xts_serpent_setkey, + .encrypt = xts_encrypt, + .decrypt = xts_decrypt, + }, + }, +}, { + .cra_name = "ecb(serpent)", + .cra_driver_name = "ecb-serpent-avx2", + .cra_priority = 600, + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, + .cra_blocksize = SERPENT_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(srp_algs[5].cra_list), + .cra_init = ablk_init, + .cra_exit = ablk_exit, + .cra_u = { + .ablkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE, + .setkey = ablk_set_key, + .encrypt = ablk_encrypt, + .decrypt = ablk_decrypt, + }, + }, +}, { + .cra_name = "cbc(serpent)", + .cra_driver_name = "cbc-serpent-avx2", + .cra_priority = 600, + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, + .cra_blocksize = SERPENT_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(srp_algs[6].cra_list), + .cra_init = ablk_init, + .cra_exit = ablk_exit, + .cra_u = { + .ablkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = ablk_set_key, + .encrypt = __ablk_encrypt, + .decrypt = ablk_decrypt, + }, + }, +}, { + .cra_name = "ctr(serpent)", + .cra_driver_name = "ctr-serpent-avx2", + .cra_priority = 600, + .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(srp_algs[7].cra_list), + .cra_init = ablk_init, + .cra_exit = ablk_exit, + .cra_u = { + .ablkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = ablk_set_key, + .encrypt = ablk_encrypt, + .decrypt = ablk_encrypt, + .geniv = "chainiv", + }, + }, +}, { + .cra_name = "lrw(serpent)", + .cra_driver_name = "lrw-serpent-avx2", + .cra_priority = 600, + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, + .cra_blocksize = SERPENT_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(srp_algs[8].cra_list), + .cra_init = ablk_init, + .cra_exit = ablk_exit, + .cra_u = { + .ablkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE + + SERPENT_BLOCK_SIZE, + .max_keysize = SERPENT_MAX_KEY_SIZE + + SERPENT_BLOCK_SIZE, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = ablk_set_key, + .encrypt = ablk_encrypt, + .decrypt = ablk_decrypt, + }, + }, +}, { + .cra_name = "xts(serpent)", + .cra_driver_name = "xts-serpent-avx2", + .cra_priority = 600, + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, + .cra_blocksize = SERPENT_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(srp_algs[9].cra_list), + .cra_init = ablk_init, + .cra_exit = ablk_exit, + .cra_u = { + .ablkcipher = { + .min_keysize = SERPENT_MIN_KEY_SIZE * 2, + .max_keysize = SERPENT_MAX_KEY_SIZE * 2, + .ivsize = SERPENT_BLOCK_SIZE, + .setkey = ablk_set_key, + .encrypt = ablk_encrypt, + .decrypt = ablk_decrypt, + }, + }, +} }; + +static int __init init(void) +{ + u64 xcr0; + + if (!cpu_has_avx2 || !cpu_has_osxsave) { + pr_info("AVX2 instructions are not detected.\n"); + return -ENODEV; + } + + xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); + if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) { + pr_info("AVX detected but unusable.\n"); + return -ENODEV; + } + + return crypto_register_algs(srp_algs, ARRAY_SIZE(srp_algs)); +} + +static void __exit fini(void) +{ + crypto_unregister_algs(srp_algs, ARRAY_SIZE(srp_algs)); +} + +module_init(init); +module_exit(fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX2 optimized"); +MODULE_ALIAS("serpent"); +MODULE_ALIAS("serpent-asm"); |