From: Guenter Roeck <linux@roeck-us.net>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org, dja@axtens.net
Subject: Re: [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK
Date: Fri, 7 Feb 2020 05:44:52 -0800 [thread overview]
Message-ID: <d6158967-fde3-1a87-44b6-07638bd2b5b0@roeck-us.net> (raw)
In-Reply-To: <29bd8702-9b8f-6931-2bbc-db7e444907d5@c-s.fr>
On 2/7/20 5:29 AM, Christophe Leroy wrote:
>
>
> 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 à 21:31, Guenter Roeck a écrit :
>>>>> 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 <christophe.leroy@c-s.fr>
>>>>>
>>>>> 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.
>>>>>
>>>>> 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 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:
>>>
>>
>> Interesting. What is your kernel configuration, your qemu version, and
>> your qemu command line ?
>
> Config is pmac32_defconfig + CONFIG_DEVTMPFS (But kernel also boots without CONFIG_DEVTMPFS)
>
> QEMU emulator version 2.11.2
>
> qemu-system-ppc -kernel vmlinux -M mac99 -initrd rootfs.cpio.gz -s -m 1024
>
> Works with both GCC 5.5 and GCC 8.1
>
Actually, the problem is that I have locking selftest options enabled
in my tests. Everything works if I disable those. The "culprit" seems
to be CONFIG_PROVE_LOCKING. Can you retest with CONFIG_PROVE_LOCKING=y ?
Thanks,
Guenter
next prev parent reply other threads:[~2020-02-07 13:44 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-21 8:32 [PATCH v5 00/17] Enable CONFIG_VMAP_STACK on PPC32 Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 01/17] powerpc/32: replace MTMSRD() by mtmsr Christophe Leroy
2020-01-29 5:17 ` Michael Ellerman
2019-12-21 8:32 ` [PATCH v5 02/17] powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 03/17] powerpc/32: save DEAR/DAR before calling handle_page_fault Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 04/17] powerpc/32: move MSR_PR test into EXCEPTION_PROLOG_0 Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 05/17] powerpc/32: add a macro to get and/or save DAR and DSISR on stack Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 06/17] powerpc/32: prepare for CONFIG_VMAP_STACK Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 07/17] powerpc: align stack to 2 * THREAD_SIZE with VMAP_STACK Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 08/17] powerpc/32: Add early stack overflow detection with VMAP stack Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 09/17] powerpc/32: Use vmapped stacks for interrupts Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 10/17] powerpc/8xx: Use alternative scratch registers in DTLB miss handler Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 11/17] powerpc/8xx: drop exception entries for non-existing exceptions Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 12/17] powerpc/8xx: move DataStoreTLBMiss perf handler Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 13/17] powerpc/8xx: split breakpoint exception Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 14/17] powerpc/8xx: Enable CONFIG_VMAP_STACK Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 15/17] powerpc/32s: reorganise DSI handler Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 16/17] powerpc/32s: avoid crossing page boundary while changing SRR0/1 Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK Christophe Leroy
2020-01-18 12:46 ` Michael Ellerman
2020-02-06 20:31 ` Guenter Roeck
2020-02-07 6:13 ` Christophe Leroy
2020-02-07 8:28 ` Christophe Leroy
2020-02-07 13:08 ` Guenter Roeck
2020-02-07 13:29 ` Christophe Leroy
2020-02-07 13:44 ` Guenter Roeck [this message]
2020-02-07 17:16 ` Christophe Leroy
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