From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huang Ying Subject: Re: [RFC 7/7] crypto: Add PCLMULQDQ accelerated GHASH implementation Date: Tue, 07 Jul 2009 11:31:52 +0800 Message-ID: <1246937512.5282.99.camel@yhuang-dev.sh.intel.com> References: <20090621135121.GA3153@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: "linux-kernel@vger.kernel.org" , "linux-crypto@vger.kernel.org" To: Herbert Xu Return-path: Received: from mga01.intel.com ([192.55.52.88]:53212 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753641AbZGGDbu (ORCPT ); Mon, 6 Jul 2009 23:31:50 -0400 In-Reply-To: <20090621135121.GA3153@gondor.apana.org.au> Sender: linux-crypto-owner@vger.kernel.org List-ID: Hi, Herbert, On Sun, 2009-06-21 at 21:51 +0800, Herbert Xu wrote: > 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 deferred to the cryptd kernel thread. > > > > Signed-off-by: Huang Ying > > All good. > > So once we fully convert everything to shash, this series can > go in with the minor changes mentioned in this thread. What's your plan to convert everything to shash? For 2.6.32? How about the progress? What can I do to help? Best Regards, Huang Ying