0e1227d356
PCLMULQDQ is used to accelerate the most time-consuming part of GHASH, carry-less multiplication. More information about PCLMULQDQ can be found at: http://software.intel.com/en-us/articles/carry-less-multiplication-and-its-usage-for-computing-the-gcm-mode/ Because PCLMULQDQ changes XMM state, its usage must be enclosed with kernel_fpu_begin/end, which can be used only in process context, the acceleration is implemented as crypto_ahash. That is, request in soft IRQ context will be defered to the cryptd kernel thread. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* Software async crypto daemon
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*/
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#ifndef _CRYPTO_CRYPT_H
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#define _CRYPTO_CRYPT_H
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#include <linux/crypto.h>
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#include <linux/kernel.h>
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#include <crypto/hash.h>
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struct cryptd_ablkcipher {
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struct crypto_ablkcipher base;
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};
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static inline struct cryptd_ablkcipher *__cryptd_ablkcipher_cast(
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struct crypto_ablkcipher *tfm)
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{
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return (struct cryptd_ablkcipher *)tfm;
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}
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/* alg_name should be algorithm to be cryptd-ed */
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struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
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u32 type, u32 mask);
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struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm);
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void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm);
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struct cryptd_ahash {
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struct crypto_ahash base;
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};
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static inline struct cryptd_ahash *__cryptd_ahash_cast(
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struct crypto_ahash *tfm)
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{
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return (struct cryptd_ahash *)tfm;
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}
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/* alg_name should be algorithm to be cryptd-ed */
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struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
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u32 type, u32 mask);
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struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm);
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struct shash_desc *cryptd_shash_desc(struct ahash_request *req);
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void cryptd_free_ahash(struct cryptd_ahash *tfm);
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#endif
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