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Fri, 7 Feb 2020 14:29:48 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id tFzuyeO9Yoiq; Fri, 7 Feb 2020 14:29:48 +0100 (CET) Received: from pc16570vm.idsi0.si.c-s.fr (po15451.idsi0.si.c-s.fr [172.25.230.107]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 549388B8BA; Fri, 7 Feb 2020 14:29:48 +0100 (CET) Subject: Re: [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK To: Guenter Roeck Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Paul Mackerras , linuxppc-dev@lists.ozlabs.org, dja@axtens.net References: <2e2509a242fd5f3e23df4a06530c18060c4d321e.1576916812.git.christophe.leroy@c-s.fr> <20200206203146.GA23248@roeck-us.net> <0f866131-4292-a66b-2637-c34139277486@c-s.fr> <551bad84-3e80-265b-93ab-25eae4aa9807@roeck-us.net> From: Christophe Leroy Message-ID: <29bd8702-9b8f-6931-2bbc-db7e444907d5@c-s.fr> Date: Fri, 7 Feb 2020 13:29:48 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <551bad84-3e80-265b-93ab-25eae4aa9807@roeck-us.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 02/07/2020 01:08 PM, Guenter Roeck wrote: > On 2/7/20 12:28 AM, Christophe Leroy wrote: >> >> >> On 02/07/2020 06:13 AM, Christophe Leroy wrote: >>> >>> >>> Le 06/02/2020 =C3=A0 21:31, Guenter Roeck a =C3=A9crit=C2=A0: >>>> On Sat, Dec 21, 2019 at 08:32:38AM +0000, Christophe Leroy wrote: >>>>> A few changes to retrieve DAR and DSISR from struct regs >>>>> instead of retrieving them directly, as they may have >>>>> changed due to a TLB miss. >>>>> >>>>> Also modifies hash_page() and friends to work with virtual >>>>> data addresses instead of physical ones. Same on load_up_fpu() >>>>> and load_up_altivec(). >>>>> >>>>> Signed-off-by: Christophe Leroy >>>> >>>> This patch results in qemu boot failures (mac99 with pmac32_defconfi= g). >>>> Images fail silently; there is no console output. Reverting the patc= h >>>> fixes the problem. Bisect log is attached below. >>>> >>>> Assuming this was tested on real hardware, am I correct to assume=20 >>>> that qemu >>>> for ppc32 (more specifically, qemu's mac99 and g3beige machines) no=20 >>>> longer >>>> works with the upstream kernel ? >>> >>> Before submitting the series, I successfully tested: >>> - Real HW with powerpc 8xx >>> - Real HW with powerpc 832x >>> - Qemu's mac99 >>> >>> I'll re-check the upstream kernel. >>> >> >> This is still working for me with the upstream kernel: >> >=20 > Interesting. What is your kernel configuration, your qemu version, and > your qemu command line ? Config is pmac32_defconfig + CONFIG_DEVTMPFS (But kernel also boots=20 without CONFIG_DEVTMPFS) QEMU emulator version 2.11.2 qemu-system-ppc -kernel vmlinux -M mac99 -initrd rootfs.cpio.gz -s -m 102= 4 Works with both GCC 5.5 and GCC 8.1 Christophe