On 10/29/2015 09:27 AM, Shannon Zhao 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. > > a) ACPI way. Since Graeme send a patchset to make ACPI on ARM64 support > amba device[2], it could use PL061 directly without modification to its > kernel driver code. In addition, we should use ACPI to start VM, > referring to below script. QEMU_EFI.fd can be fetched from [3]. > > qemu-system-aarch64 \ > -smp 1 -m 1024 -M virt \ > -cpu cortex-a57 -nographic \ > -monitor telnet::4444,server,nowait \ > -bios QEMU_EFI.fd \ > -kernel Image \ > -initrd guestfs.cpio.gz \ > -append "rdinit=/sbin/init console=ttyAMA0 mem=512M root=/dev/ram > earlycon=pl011,0x9000000 rw acpi=force" > > b) DT way. Start vm as usual. > > qemu-system-aarch64 \ > -smp 1 -m 1024 -M virt \ > -cpu cortex-a57 -nographic \ > -monitor telnet::4444,server,nowait \ > -kernel Image \ > -initrd guestfs.cpio.gz \ > -append "rdinit=/sbin/init console=ttyAMA0 mem=512M root=/dev/ram > earlycon=pl011,0x9000000 rw" > > Guest internal setup: > If your guest FS uses systemd, you should check file > /lib/udev/rules.d/70-power-switch.rules and add the following line in it > if it doesn't exist. > > SUBSYSTEM=="input", KERNEL=="event*", SUBSYSTEMS=="platform", > ATTRS{keys}=="116", TAG+="power-switch" > > If your guest FS uses acpid, you should check it has > /etc/acpi/powerbtn.sh and /etc/acpi/events/powerbtn. Refer to [4] for > the setup of acpid. > > Thanks, > Shannon > > [1] > https://git.linaro.org/people/shannon.zhao/qemu.git/shortlog/refs/heads/PowerButton_v2 > [2] https://lkml.org/lkml/2015/9/30/392 > [3] http://people.linaro.org/~shannon.zhao/ACPI_ARM/QEMU_EFI.fd > [4] https://wiki.linaro.org/LEG/Engineering/Kernel/ACPI/GPIOPowerButton
Compared with v1, this version doesn't work with system_powerdown command. In my setup, the testing environment is exactly same for both v1 and v2. So something changed in v2 caused system_powerdown fail to work. -Wei > > 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 > > hw/acpi/aml-build.c | 79 > +++++++++++++++++++++++++++++++++++++++++++++ > hw/arm/virt-acpi-build.c | 45 ++++++++++++++++++++++++++ > hw/arm/virt.c | 60 ++++++++++++++++++++++++++++++++++ > include/hw/acpi/aml-build.h | 26 +++++++++++++++ > include/hw/arm/virt.h | 1 + > 5 files changed, 211 insertions(+) >