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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 05:08:11 -0800	[thread overview]
Message-ID: <551bad84-3e80-265b-93ab-25eae4aa9807@roeck-us.net> (raw)
In-Reply-To: <0f866131-4292-a66b-2637-c34139277486@c-s.fr>

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 ?

It works for me with CONFIG_VMAP_STACK=n, but not with pmac32_defconfig.

Thanks,
Guenter

  reply	other threads:[~2020-02-07 13:08 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 [this message]
2020-02-07 13:29           ` Christophe Leroy
2020-02-07 13:44             ` Guenter Roeck
2020-02-07 17:16               ` Christophe Leroy

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