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Fri, 7 Feb 2020 07:13:37 +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 cciXfyni8DUB; Fri, 7 Feb 2020 07:13:37 +0100 (CET) Received: from [172.25.230.107] (po15451.idsi0.si.c-s.fr [172.25.230.107]) by messagerie.si.c-s.fr (Postfix) with ESMTP id C04DA8B75B; Fri, 7 Feb 2020 07:13:37 +0100 (CET) Subject: Re: [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK To: Guenter Roeck Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , dja@axtens.net, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org References: <2e2509a242fd5f3e23df4a06530c18060c4d321e.1576916812.git.christophe.leroy@c-s.fr> <20200206203146.GA23248@roeck-us.net> From: Christophe Leroy Message-ID: Date: Fri, 7 Feb 2020 07:13:37 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <20200206203146.GA23248@roeck-us.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr 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: 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 >=20 > This patch results in qemu boot failures (mac99 with pmac32_defconfig). > Images fail silently; there is no console output. Reverting the patch > fixes the problem. Bisect log is attached below. >=20 > Assuming this was tested on real hardware, am I correct to assume that = qemu > for ppc32 (more specifically, qemu's mac99 and g3beige machines) no lon= ger > 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. In the mean time, you can still unselect CONFIG_VMAP_STACK in your config= . Christophe