Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756670AbaLWXvS (ORCPT ); Tue, 23 Dec 2014 18:51:18 -0500 Received: from filtteri6.pp.htv.fi ([213.243.153.189]:58978 "EHLO filtteri6.pp.htv.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756645AbaLWXvP (ORCPT ); Tue, 23 Dec 2014 18:51:15 -0500 Date: Wed, 24 Dec 2014 01:51:08 +0200 From: Aaro Koskinen To: James Hogan Cc: Paul Burton , Ralf Baechle , linux-mips@linux-mips.org, Alexander Viro , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 07/10] MIPS: support for hybrid FPRs Message-ID: <20141223235108.GA582@fuloong-minipc.musicnaut.iki.fi> References: <1410420623-11691-1-git-send-email-paul.burton@imgtec.com> <1410420623-11691-8-git-send-email-paul.burton@imgtec.com> <20141223232111.GA593@fuloong-minipc.musicnaut.iki.fi> <20141223233154.GA4171@jhogan-linux.le.imgtec.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141223233154.GA4171@jhogan-linux.le.imgtec.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Tue, Dec 23, 2014 at 11:31:54PM +0000, James Hogan wrote: > On Wed, Dec 24, 2014 at 01:21:11AM +0200, Aaro Koskinen wrote: > > On Thu, Sep 11, 2014 at 08:30:20AM +0100, Paul Burton wrote: > > > Hybrid FPRs is a scheme where scalar FP registers are 64b wide, but > > > accesses to odd indexed single registers use bits 63:32 of the > > > preceeding even indexed 64b register. In this mode all FP code > > > except that built for the plain FP64 ABI can execute correctly. Most > > > notably a combination of FP64A & FP32 code can execute correctly, > > > allowing for existing FP32 binaries to be linked with new FP64A binaries > > > that can make use of 64 bit FP & MSA. > > > > This commit (4227a2d4efc9c84f35826dc4d1e6dc183f6c1c05, bisected) > > in 3.19-rc1 breaks my Loongson-2F system. I get endless amount > > of "Reserved instruction in kernel code" exceptions when booting. > > See some examples below. Nothing crashes, and there is some forward > > progress, but obviously it's completely unusable. > > > > Any ideas? > > > > [ 2.872000] Reserved instruction in kernel code[#1]: > ... > > Code: 30420001 2c420001 0040202d <40038005> 2405feff 00651824 40838005 3c032000 3c052400 > > 0x40038005 = mfc0 v1,$16,5 = mfc0 v1,Config5 > > Does this help (in linux-next)?: > http://git.linux-mips.org/cgit/ralf/upstream-sfr.git/commit/?id=5bba8dec735f18fe7a2fcd8327f28ef095337ff2 Yes, it does. Many thanks! A. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/