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| author | Huang Ying <ying.huang@intel.com> | 2009-10-19 11:53:06 +0900 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-10-19 11:53:06 +0900 |
| commit | 0e1227d356e9b2fe0500d6cc7084f752040a1e0e (patch) | |
| tree | 6f059b8e3c31539942ad244e7aadabcb54e8d904 /include/crypto | |
| parent | 4c6ab3ee4cdb86cbd4e9400dd22fad7701cbe795 (diff) | |
| download | lwn-0e1227d356e9b2fe0500d6cc7084f752040a1e0e.tar.gz lwn-0e1227d356e9b2fe0500d6cc7084f752040a1e0e.zip | |
crypto: ghash - Add PCLMULQDQ accelerated implementation
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>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/cryptd.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/crypto/cryptd.h b/include/crypto/cryptd.h index 2f65a6e8ea4d..1c96b255017c 100644 --- a/include/crypto/cryptd.h +++ b/include/crypto/cryptd.h @@ -39,6 +39,7 @@ static inline struct cryptd_ahash *__cryptd_ahash_cast( struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, u32 type, u32 mask); struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm); +struct shash_desc *cryptd_shash_desc(struct ahash_request *req); void cryptd_free_ahash(struct cryptd_ahash *tfm); #endif |