Re: [Qemu-discuss] qemu-system-aarch64 doesn't close after guest executes halt -f

[Dawid Stencel]

Hi

I tied the "poweroff -f" from the Linux guest system and it works as 
expected, but it does not need the PL061 GPIO to shutdown the system and 
QEMU ( I removed it from the code and poweroff still works).

So if Peter is correct that the PL061 GPIO Poweroff button is 
implemented as a hardware poweroff switch then it should be possible to 
shutdown Linux from QEMU monitor by calling:

(qemu) system_powerdown

but it does not work.

Either I do not understand the purpose of the PL061 powerdown button 
purpose or there is a bug in the QEMU.

Does anyone know how to use the PL061 GPIO Poweroff button ?

Regards,

Dawid

On 05.09.2019 15:12, Shlomo Pongratz wrote:
> On Thu, Sep 5, 2019 at 4:09 PM Shlomo Pongratz <address@hidden> wrote:
> > On Thu, Sep 5, 2019 at 3:04 PM Peter Maydell <address@hidden> wrote:
> > > On Thu, 5 Sep 2019 at 12:10, Shlomo Pongratz <address@hidden> wrote:
> > > > Thank you,
> > > > I've added the GONFIG_GPIO_PL061 (isn't it emulated on realview only?)
> > > No, the 'virt' board provides a PL061, largely just for
> > > this kind of power control purpose. I've just remembered
> > > though that the PL061 is for power-control in the other
> > > direction -- it allows you to shut down QEMU from outside
> > > the VM by providing effectively an emulated power button.
> > > The mechanism used for the VM to shut itself down should
> > > be the PSCI power-control APIs. Check you have CONFIG_ARM_PSCI_FW
> > > in your kernel config.
> > >
> > > > and CONFIG_KEYBOARD_GPIO and also added The CONFIG_POWER_RESET_GPIO.
> > > > But the QEMU still doesn't exit after halt -f.
> > > > Is there a Linux config file that is known to be able to make QEMU
> > > > exit that I and use as starting point?
> > > Yes, try the arm64 defconfig.
> > >
> > > thanks
> > > -- PMM
> > Thank,
> >
> > I've tried to build Linux (5.2.1) with the configuration found in
> > arch/arm64/configs/defconfig
> > and yes Symbol: ARM_PSCI_FW [=y] in this configuration.
> > But still "halt -f" (busybox v1.31.0) doesn't make QEMU
> > (qemu-systme-aarch64 version qemu-3.1.0-9.fc30) exit.
> > (and again machine=virt).
> >
> > Best regards,
> >
> > S.P.
> O.K.
>
> It seems that busybox' applet poweroff -f did the trick.
> Sorry for all the trouble.
>
> best regards,
>
> S.P.

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