Re: [Qemu-devel] [PATCH v2 0/8] Add system_powerdown support on ARM for ACPI and DT

[Igor Mammedov <imammedo@redhat.com>]

On Fri, 27 Nov 2015 17:18:06 +0000
Peter Maydell <peter.maydell@linaro.org> wrote:

> On 29 October 2015 at 14:27, Shannon Zhao <shannon.zhao@linaro.org> wrote:
> > ACPI SPEC 5.0 defines GPIO-signaled ACPI Events for Hardware-reduced
> > platforms(like ARM). It uses GPIO pin to trigger an event to the guest.
> > For QEMU, here we add PL061 GPIO controller and use PIN 3 for
> > system_powerdown, reserving PIN 0, 1, 2 for PCI hotplug, CPU hotplug and
> > memory hotplug.
> >
> > This patchset adds system_powerdown support on ARM through both ACPI and
> > DT ways. It adds a GPIO controller(here is PL061) in machine virt and
> > uses GPIO-singled event for ACPI while gpio-keys for DT. It can be
> > fetched from [1] and has been tested for the guests starting by ACPI or
> > DT while guests use systemd or acpid.
> 
> > Changes since v1:
> > * rewrite GPIO Connection Descriptor (Michael)
> >
> > Shannon Zhao (8):
> >   hw/arm/virt: Add a GPIO controller
> >   hw/arm/virt-acpi-build: Add GPIO controller in ACPI DSDT table
> >   hw/arm/virt-acpi-build: Add power button device in ACPI DSDT table
> >   hw/acpi/aml-build: Add GPIO Connection Descriptor
> >   hw/acpi/aml-build: Add a wrapper for GPIO Interrupt Connection
> >   hw/arm/virt-acpi-build: Add _E03 for Power Button
> >   hw/arm/virt: Add QEMU powerdown notifier and hook it to GPIO Pin 3
> >   hw/arm/virt: Add gpio-keys node for Poweroff using DT
> 
> Thanks; this patchset looks generally good to me (I had a few
> minor remarks about patch 8). I would appreciate review from
> folks familiar with the ACPI spec for patches 2, 3, 4, 5 and 6, though.
I'll do it.

> 
> -- PMM
>