Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751718AbaDXGQ4 (ORCPT ); Thu, 24 Apr 2014 02:16:56 -0400 Received: from mail-wi0-f172.google.com ([209.85.212.172]:65459 "EHLO mail-wi0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751463AbaDXGQy (ORCPT ); Thu, 24 Apr 2014 02:16:54 -0400 Message-ID: <5358AC50.7020308@monstr.eu> Date: Thu, 24 Apr 2014 08:16:48 +0200 From: Michal Simek Reply-To: monstr@monstr.eu User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130330 Thunderbird/17.0.5 MIME-Version: 1.0 To: Guenter Roeck CC: linux-kernel@vger.kernel.org Subject: Re: Microblaze image hanging in qemu with 3.15-rc References: <20140422172356.GA15672@roeck-us.net> <53575074.6010602@monstr.eu> <5357C246.7050604@roeck-us.net> <5357CA6B.1070101@monstr.eu> <20140423154533.GA15644@roeck-us.net> In-Reply-To: <20140423154533.GA15644@roeck-us.net> X-Enigmail-Version: 1.6 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="haq0Ig7VTCvvwxuOiEQEwSPUFq3NGhxV0" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --haq0Ig7VTCvvwxuOiEQEwSPUFq3NGhxV0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 04/23/2014 05:45 PM, Guenter Roeck wrote: > On Wed, Apr 23, 2014 at 04:12:59PM +0200, Michal Simek wrote: >> On 04/23/2014 03:38 PM, Guenter Roeck wrote: >>> On 04/22/2014 10:32 PM, Michal Simek wrote: >>>> Hi Guenter, >>>> >>>> >>>> On 04/22/2014 07:23 PM, Guenter Roeck wrote: >>>>> Hi all, >>>>> >>>>> when trying to run a microblaze image with 3.15-rc1 or 3.15-rc2 in = qemu, >>>>> I get the following hangup. This used to work with earlier kernels >>>>> with the same configuration. >>>>> >>>>> Is this a known problem, or is something wrong with my configuratio= n >>>>> or with my qemu command line ? >>>> >>>> Is this BE/LE version? Which qemu do you use? >>> >>> BE. >>> >>> file vmlinux: >>> >>> vmlinux: ELF 32-bit MSB executable, version 1 (SYSV), statically lin= ked, BuildID[sha1]=3D5e1872c08df2956eddaed6fc1f6528a8540375b7, not stripp= ed >>> >>> qemu-system-microblaze --version: >>> >>> QEMU emulator version 1.7.0, Copyright (c) 2003-2008 Fabrice Bellard >>> >>> gcc --version: >>> >>> microblaze-linux-gcc (GCC) 4.8.0 >>> Copyright (C) 2013 Free Software Foundation, Inc. >>> This is free software; see the source for copying conditions. There = is NO >>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PU= RPOSE. >>> >>>> There is endian autodetection in timer and intc driver >>>> which can caused this problem. >>>> >>> Is this new code ? I didn't see the problem in 3.13 (same compile opt= ions, >>> same configuration, same compiler, same qemu version). >> >> yes it was added to 3.15-rc1. >> >> Try to rever this one >> a66a626 microblaze: Use asm-generic/io.h >> >> but the problem is probably here because you are not getting proper >> reaction from qemu model. >> a1715bb microblaze: Make timer driver endian aware >> 1aa1243 microblaze: Make intc driver endian aware >> >> I have tested it on the latest petalinux qemu and there shouldn't be >> any problem. >> > Hi Michal, >=20 > qemu 2.0.0 still has the problem. Bisect points to >=20 > commit a66a626538af65cbfc611e2b2fce500ed3f24518 > Author: Michal Simek > Date: Thu Feb 7 15:12:24 2013 +0100 >=20 > microblaze: Use asm-generic/io.h >=20 > as the culprit, so you were right on the money. Reverting this commit > fixes the problem. yep. But it is just side effect of previous two commits I have mentioned.= Can you just please check if you are setting up correct IO functions? write_fn =3D timer_write32; read_fn =3D timer_read32; write_fn(TCSR_MDT, timer_baseaddr + TCSR0); if (!(read_fn(timer_baseaddr + TCSR0) & TCSR_MDT)) { write_fn =3D timer_write32_be; read_fn =3D timer_read32_be; } git > Assuming this is in fact a problem with qemu, can you point me to a set= > of qemu patches necessary to fix it ? Also, do you know if there are pl= ans > to send the patches upstream ? I don't find anything related in the qem= u > repository (though of course I may have missed it). Yes, it should be qemu issue. I am not aware about particular qemu patche= s but you can try to use https://github.com/Xilinx/qemu but now sure if Peter updating this repository. Anyway if you look at code above and I expect that the problem is just that autodetection is broken in your qemu it should be pretty simple to fix it. Thanks, Michal --=20 Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91 w: www.monstr.eu p: +42-0-721842854 Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/ Maintainer of Linux kernel - Xilinx Zynq ARM architecture Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform --haq0Ig7VTCvvwxuOiEQEwSPUFq3NGhxV0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlNYrFEACgkQykllyylKDCHZUQCZAYaLeaG7yMZTYMSqzwidwhnZ tNUAn1LO2zONzx8G7j08Q99suF34aMAE =tAze -----END PGP SIGNATURE----- --haq0Ig7VTCvvwxuOiEQEwSPUFq3NGhxV0-- -- 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/