2013-09-18 10:35:33

by Waldemar Brodkorb

Subject: problem booting linux with qemu-system-arm -M spitz

Hi Kernel hackers,

I am trying to run Linux on Qemu/arm emulator with machine type
spitz. In the past this worked fine.
Now with Linux version 3.9.11 it does not boot anymore.
(blank screen, no kernel messages)

I used git bisect to find the commit, which breaks the boot:
commit 4e8ee7de227e3ab9a72040b448ad728c5428a042
Author: Will Deacon <[email protected]>
Date: Wed Nov 23 12:26:25 2011 +0000

I am using Qemu 1.6.0 on a Debian/x86_64 host.

Any help would be appreciated.

Thanks in advance
Waldemar

2013-09-18 13:51:10

by Andrea Adami

Subject: Re: problem booting linux with qemu-system-arm -M spitz

On Wed, Sep 18, 2013 at 12:27 PM, Waldemar Brodkorb <[email protected]> wrote:
> Hi Kernel hackers,
>
> I am trying to run Linux on Qemu/arm emulator with machine type
> spitz. In the past this worked fine.
> Now with Linux version 3.9.11 it does not boot anymore.
> (blank screen, no kernel messages)
>
> I used git bisect to find the commit, which breaks the boot:
> commit 4e8ee7de227e3ab9a72040b448ad728c5428a042
> Author: Will Deacon <[email protected]>
> Date: Wed Nov 23 12:26:25 2011 +0000
>
> I am using Qemu 1.6.0 on a Debian/x86_64 host.
>
> Any help would be appreciated.
>
> Thanks in advance
> Waldemar
>
> _______________________________________________
> linux-arm-kernel mailing list
> [email protected]
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

On real hardware I see the same breakage after 3.2.
Marko diagnosed it and there is a pending patch:

http://lists.infradead.org/pipermail/linux-arm-kernel/2013-September/198444.html

There is indeed some MMU-related issue.
Probably the function could be called elsewhere during machine init
but I'm not so high in the food chain to dare to touch arm boot code
;)

Regards

Andrea

2013-09-18 15:07:17

by Waldemar Brodkorb

Subject: Re: problem booting linux with qemu-system-arm -M spitz

Hi,
Andrea Adami wrote,

> On Wed, Sep 18, 2013 at 12:27 PM, Waldemar Brodkorb <[email protected]> wrote:
> > Hi Kernel hackers,
> >
> > I am trying to run Linux on Qemu/arm emulator with machine type
> > spitz. In the past this worked fine.
> > Now with Linux version 3.9.11 it does not boot anymore.
> > (blank screen, no kernel messages)
> >
> > I used git bisect to find the commit, which breaks the boot:
> > commit 4e8ee7de227e3ab9a72040b448ad728c5428a042
> > Author: Will Deacon <[email protected]>
> > Date: Wed Nov 23 12:26:25 2011 +0000
> >
> > I am using Qemu 1.6.0 on a Debian/x86_64 host.
> >
> > Any help would be appreciated.
> >
> > Thanks in advance
> > Waldemar
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > [email protected]
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
> On real hardware I see the same breakage after 3.2.
> Marko diagnosed it and there is a pending patch:
>
> http://lists.infradead.org/pipermail/linux-arm-kernel/2013-September/198444.html
>
> There is indeed some MMU-related issue.
> Probably the function could be called elsewhere during machine init
> but I'm not so high in the food chain to dare to touch arm boot code
> ;)
>
> Regards

Great! Thank you very much, this works fine.

best regards
Waldemar