linux-kernel - Re: [Qemu-devel] Running linux on qemu omap

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Message-ID: <c2972889-fe60-7614-fb6e-e57ddf780a54@redhat.com>
Date:   Thu, 23 May 2019 14:00:41 +0200
From:   Philippe Mathieu-Daudé <philmd@...hat.com>
To:     Thomas Huth <thuth@...hat.com>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
        qemu-devel@...gnu.org, linux-kernel@...r.kernel.org,
        Peter Maydell <peter.maydell@...aro.org>
Subject: Re: [Qemu-devel] Running linux on qemu omap

On 5/23/19 1:27 PM, Thomas Huth wrote:
> On 22/05/2019 20.19, Aaro Koskinen wrote:
>> Hi,
>>
>> On Wed, May 22, 2019 at 11:33:41AM +0200, Corentin Labbe wrote:
>>> qemu-system-arm -M help |grep OMAP
>>> cheetah              Palm Tungsten|E aka. Cheetah PDA (OMAP310)
>>> n800                 Nokia N800 tablet aka. RX-34 (OMAP2420)
>>> n810                 Nokia N810 tablet aka. RX-44 (OMAP2420)
>>> sx1                  Siemens SX1 (OMAP310) V2
>>> sx1-v1               Siemens SX1 (OMAP310) V1
>>>
>>>>> The maximum I can get with omap1_defconfig is
>>>>> qemu-system-arm -kernel zImage -nographic -machine cheetah -append 'root=/dev/ram0 console=ttyO0'
>>>>> Uncompressing Linux... done, booting the kernel.
>>>>> then nothing more.
>>
>> With N800/N810 omap2plus_defconfig should be used instead. However,
>> I don't think that works either (but haven't tried recently). Also with
>> N800/N810 you need to append the DTB file to the kernel image.
> 
> FWIW, Philippe recently posted a mail how to run older kernels on n810:
> 
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg610653.html

What I use as reference for testing ARM boards [*] is the work of
Guenter Roeck:
https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/run-qemu-arm.sh

However I can see than none of the board listed by Corentin are tested
... That reminder me I never succeed at using the Cheetah PDA. So the
OMAP310 is probably bitroting in QEMU...

[*] and slowly add to upstream patches he sent that fell through the
cracks of qemu-devel.

Regards,

Phil.



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