From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758544AbZDLLNq (ORCPT ); Sun, 12 Apr 2009 07:13:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752315AbZDLLNg (ORCPT ); Sun, 12 Apr 2009 07:13:36 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:32849 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750779AbZDLLNg (ORCPT ); Sun, 12 Apr 2009 07:13:36 -0400 Date: Sun, 12 Apr 2009 13:13:14 +0200 From: Ingo Molnar To: Suresh Siddha Cc: hpa@linux.intel.com, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: [patch] x86: add linux kernel support for YMM state Message-ID: <20090412111314.GF25392@elte.hu> References: <1239402084.27006.8057.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1239402084.27006.8057.camel@localhost.localdomain> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Suresh Siddha wrote: > From: Suresh Siddha > Subject: x86: add linux kernel support for YMM state > > Intel Advanced Vector Extensions (AVX) introduce 256-bit vector > processing capability. More about AVX at > http://software.intel.com/sites/avx > > Add OS support for YMM state management using xsave/xrstor > infrastructure to support AVX. > > Signed-off-by: Suresh Siddha This looks very straightforward - if a CPU announces this capability we save/restore that state via xsave/xrstor. So i've applied it to x86/urgent - looks uncontroversial enough to still go into 2.6.30. Have you tested it on real silicon too? Ingo