linux-kernel - Re: ppc64 qemu test failure since commit f9aa67142 ("powerpc/64s: Consolidate Alignment 0x600 interrupt")

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Date:   Mon, 10 Oct 2016 05:46:34 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: ppc64 qemu test failure since commit f9aa67142 ("powerpc/64s:
 Consolidate Alignment 0x600 interrupt")

Hi Michael,

On 10/09/2016 11:00 PM, Michael Ellerman wrote:
> Guenter Roeck <linux@...ck-us.net> writes:
>
>> Nicholas,
>>
>> some of my qemu tests for ppc64 started failing on mainline (and -next).
>> You can find a test log at
>> http://kerneltests.org/builders/qemu-ppc64-master/builds/580/steps/qemubuildcommand/logs/stdio
>>
>> The scripts to run the test are available at
>> https://github.com/groeck/linux-build-test/tree/master/rootfs/ppc64
>>
>> Bisect points to commit f9aa67142ef26 ("powerpc/64s: Consolidate Alignment 0x600
>> interrupt"). Bisect log is attached.
>>
>> Since I don't have the means to run the code on a real system, I have no idea
>> if the problem is caused by qemu or by the code. It is interesting, though, that
>> only the 'mac99' tests are affected.
>
> Thanks for the report.
>
> I do test qemu mac99 as part of my CI, and it's booting OK, so there
> must be some config difference?
>
> I'm using pmac32_defconfig plus:
>
> CONFIG_LOCALVERSION_AUTO=y
> CONFIG_SERIAL_PMACZILOG=y
> CONFIG_SERIAL_PMACZILOG_TTYS=n
> CONFIG_SERIAL_PMACZILOG_CONSOLE=y
> CONFIG_DEVTMPFS=y
> CONFIG_DEVTMPFS_MOUNT=y
>
> And running with:
>
> $ qemu-system-ppc -nographic -vga none -M mac99 -m 1G -kernel vmlinux -initrd $HOME/static/ppc32-initrd.gz -append "console=ttyPZ0 init=/bin/sh"
>

I am building a 64bit image, and my test runs with qemu-system-ppc64.
My 32bit tests for mac99 are fine as well.

Guenter