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 <shlomopongr...@gmail.com> wrote:
On Thu, Sep 5, 2019 at 3:04 PM Peter Maydell <peter.mayd...@linaro.org> wrote:
On Thu, 5 Sep 2019 at 12:10, Shlomo Pongratz <shlomopongr...@gmail.com> 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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