On Mon, Aug 03, 2009 at 03:45:31PM +0800, Huang Ying wrote: > 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@xxxxxxxxx> Please resubmit this patch once irq_is_fpu_using() hits mainline. Thanks, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
