From: Andi Kleen Subject: Re: [PATCH] crypto: serpent - add x86_64/avx assembler implementation Date: Wed, 30 May 2012 23:55:37 +0200 Message-ID: <20120530215537.GA27374@one.firstfloor.org> References: <20120527145112.GF17705@kronos.redsun> <20120530103025.19252e1urui8sfb4@www.81.fi> <20120530113235.GO17705@kronos.redsun> <20120530153949.GS27374@one.firstfloor.org> <20120530212911.GA14884@gondor.apana.org.au> <20120530214006.GZ27374@one.firstfloor.org> <20120530214448.GA15031@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andi Kleen , Johannes Goetzfried , Jussi Kivilinna , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, Tilo =?iso-8859-1?Q?M=FCller?= To: Herbert Xu Return-path: Received: from one.firstfloor.org ([213.235.205.2]:48617 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757055Ab2E3Vzj (ORCPT ); Wed, 30 May 2012 17:55:39 -0400 Content-Disposition: inline In-Reply-To: <20120530214448.GA15031@gondor.apana.org.au> Sender: linux-crypto-owner@vger.kernel.org List-ID: On Thu, May 31, 2012 at 07:44:48AM +1000, Herbert Xu wrote: > On Wed, May 30, 2012 at 11:40:06PM +0200, Andi Kleen wrote: > > > > > What we could do is to use the cpuid-based probing when an algorithm > > > is needed to selectively load the relevant implementations instead > > > of all of them. However, for most algorithms it won't make that > > > big a difference since all the available ones will be loaded anyway. > > > > Yes cpuid probing does that. > > I was under the impression that using cpuid meant that the algorithm > would be loaded regardless of whether it has been requested, as long > as the cpuid matches. It loads it always correct. -Andi -- ak@linux.intel.com -- Speaking for myself only.