[Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Tomasz Chmielewski]

I'm trying to run Debian Etch with Qemu 0.9.1, using ARM Versatile/PB 
machine emulation, with a self-compiled 2.6.20 kernel.

Everything works fine, except that I can't shutdown the guest properly.

When I want to halt the guest system, it shutdowns just fine up to:

   Will now halt.
   Synchronizing SCSI cache for disk sda:
   System halted.

But the qemu-system-arm process continues to run.

Is there a workaround to that? I would expect qemu process to exit as well.



-- 
Tomasz Chmielewski
http://wpkg.org

Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Jamie Lokier]

Tomasz Chmielewski wrote:
> I'm trying to run Debian Etch with Qemu 0.9.1, using ARM Versatile/PB 
> machine emulation, with a self-compiled 2.6.20 kernel.
> 
> Everything works fine, except that I can't shutdown the guest properly.
> 
> When I want to halt the guest system, it shutdowns just fine up to:
> 
>   Will now halt.
>   Synchronizing SCSI cache for disk sda:
>   System halted.
> 
> But the qemu-system-arm process continues to run.
> 
> Is there a workaround to that? I would expect qemu process to exit as well.

Try poweroff instead of halt.

-- Jamie

Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Paul Brook]

On Tuesday 10 June 2008, Tomasz Chmielewski wrote:
> I'm trying to run Debian Etch with Qemu 0.9.1, using ARM Versatile/PB
> machine emulation, with a self-compiled 2.6.20 kernel.
>
> Everything works fine, except that I can't shutdown the guest properly.
>
> When I want to halt the guest system, it shutdowns just fine up to:
>
>    Will now halt.
>    Synchronizing SCSI cache for disk sda:
>    System halted.
>
> But the qemu-system-arm process continues to run.

AFAIK the versatile/pb hardware doesn't have any mechanism for powering off. 
You have to kill it manually.

Paul

Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Tomasz Chmielewski]

Jamie Lokier schrieb:

(...)

>> When I want to halt the guest system, it shutdowns just fine up to:
>>
>>   Will now halt.
>>   Synchronizing SCSI cache for disk sda:
>>   System halted.
>>
>> But the qemu-system-arm process continues to run.
>>
>> Is there a workaround to that? I would expect qemu process to exit as well.
> 
> Try poweroff instead of halt.

No, it doesn't make a difference.

Note that it shutdowns fine (including qemu process) when the guest is x86.

With an ARM guest, qemu keeps running. Perhaps the guest needs something 
in the kernel? I added APM, but it didn't make a difference.


When the guest is halted, this is what I get when I strace the 
qemu-system-arm process (endlessly in a loop):

--- SIGALRM (Alarm clock) @ 0 (0) ---
sigreturn()                             = ? (mask now [])
clock_gettime(CLOCK_MONOTONIC, {7954727, 280679359}) = 0
clock_gettime(CLOCK_MONOTONIC, {7954727, 280821359}) = 0
clock_gettime(CLOCK_MONOTONIC, {7954727, 280954359}) = 0
clock_gettime(CLOCK_MONOTONIC, {7954727, 281085359}) = 0
clock_gettime(CLOCK_MONOTONIC, {7954727, 281215359}) = 0
timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0
timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 2381000}}, NULL) = 0
select(8, [5 7], [], [], {0, 0})        = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {7954727, 281824359}) = 0
clock_gettime(CLOCK_MONOTONIC, {7954727, 281955359}) = 0
select(8, [5 7], [], [], {0, 10000})    = ? ERESTARTNOHAND (To be restarted)


-- 
Tomasz Chmielewski
http://wpkg.org

Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Tomasz Chmielewski]

Paul Brook schrieb:
> On Tuesday 10 June 2008, Tomasz Chmielewski wrote:
>> I'm trying to run Debian Etch with Qemu 0.9.1, using ARM Versatile/PB
>> machine emulation, with a self-compiled 2.6.20 kernel.
>>
>> Everything works fine, except that I can't shutdown the guest properly.
>>
>> When I want to halt the guest system, it shutdowns just fine up to:
>>
>>    Will now halt.
>>    Synchronizing SCSI cache for disk sda:
>>    System halted.
>>
>> But the qemu-system-arm process continues to run.
> 
> AFAIK the versatile/pb hardware doesn't have any mechanism for powering off. 
> You have to kill it manually.

Does anyone know if any of other ARM flavour emulated by Qemu is able to 
power off?


-- 
Tomasz Chmielewski
http://wpkg.org

Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[andrzej zaborowski]

On 10/06/2008, Tomasz Chmielewski <mangoo@wpkg.org> wrote:
> Paul Brook schrieb:
>
>
> > On Tuesday 10 June 2008, Tomasz Chmielewski wrote:
> >
> > > I'm trying to run Debian Etch with Qemu 0.9.1, using ARM Versatile/PB
> > > machine emulation, with a self-compiled 2.6.20 kernel.
> > >
> > > Everything works fine, except that I can't shutdown the guest properly.
> > >
> > > When I want to halt the guest system, it shutdowns just fine up to:
> > >
> > >   Will now halt.
> > >   Synchronizing SCSI cache for disk sda:
> > >   System halted.
> > >
> > > But the qemu-system-arm process continues to run.
> > >
> >
> > AFAIK the versatile/pb hardware doesn't have any mechanism for powering
> off. You have to kill it manually.
> >
>
>  Does anyone know if any of other ARM flavour emulated by Qemu is able to
> power off?

If you mean any other ARM-based machine, the N800 and Palm T|E can and
also the Neo1973 (in svn.openmoko.org).  They lack other features that
versatile/PB has, though.  They are all embedded systems and Versatile
may be the most pc-like machine with an ARM cpu in qemu.

You can modify the versatile kernel to issue some signal to shut down
but that will only work in qemu.
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Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[Tomasz Chmielewski]

andrzej zaborowski schrieb:

>>  Does anyone know if any of other ARM flavour emulated by Qemu is able to
>> power off?
> 
> If you mean any other ARM-based machine, the N800 and Palm T|E can and
> also the Neo1973 (in svn.openmoko.org).  They lack other features that
> versatile/PB has, though.  They are all embedded systems and Versatile
> may be the most pc-like machine with an ARM cpu in qemu.

I meant any of the ARM machines which can be emulated by Qemu:

$ qemu-system-arm -M ?
Supported machines are:
integratorcp ARM Integrator/CP (ARM926EJ-S) (default)
versatilepb ARM Versatile/PB (ARM926EJ-S)
versatileab ARM Versatile/AB (ARM926EJ-S)
realview   ARM RealView Emulation Baseboard (ARM926EJ-S)
akita      Akita PDA (PXA270)
spitz      Spitz PDA (PXA270)
borzoi     Borzoi PDA (PXA270)
terrier    Terrier PDA (PXA270)
cheetah    Palm Tungsten|E aka. Cheetah PDA (OMAP310)
lm3s811evb Stellaris LM3S811EVB
lm3s6965evb Stellaris LM3S6965EVB
connex     Gumstix Connex (PXA255)
verdex     Gumstix Verdex (PXA270)
mainstone  Mainstone II (PXA27x)


According to what you say, "cheetah" should be able to power off? Does 
it have any network interface? I don't see it mentioned here:

http://bellard.org/qemu/qemu-doc.html#SEC63


-- 
Tomasz Chmielewski
http://wpkg.org

Re: [Qemu-devel] what is needed to shutdown a guest (including Qemu process)?

[andrzej zaborowski]

On 10/06/2008, Tomasz Chmielewski <mangoo@wpkg.org> wrote:
>  According to what you say, "cheetah" should be able to power off?

Yes.

> Does it
> have any network interface? I don't see it mentioned here:

No, it doesn't.  The PDA has infrared as the only communications port
(on first -serial in qemu).

N800 emulation has host usb and we use it with the usb networking
patch successfully.  You will still like versatile/PB more.
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