From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42783) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a5qPP-0001gW-OZ for qemu-devel@nongnu.org; Mon, 07 Dec 2015 02:40:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a5qPO-0004Ng-8S for qemu-devel@nongnu.org; Mon, 07 Dec 2015 02:40:31 -0500 From: Shannon Zhao Date: Mon, 7 Dec 2015 15:39:44 +0800 Message-ID: <1449473992-11560-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v4 0/8] Add system_powerdown support on ARM for ACPI and DT List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-arm@nongnu.org, peter.maydell@linaro.org, mst@redhat.com, imammedo@redhat.com, wei@redhat.com Cc: peter.huangpeng@huawei.com, zhaoshenglong@huawei.com, qemu-devel@nongnu.org, graeme.gregory@linaro.org, shannon.zhao@linaro.org From: Shannon Zhao 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 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[1], 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 [2]. 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 [3] for the setup of acpid. Thanks, Shannon [1] https://lkml.org/lkml/2015/9/30/392 [2] http://people.linaro.org/~shannon.zhao/ACPI_ARM/QEMU_EFI.fd [3] https://wiki.linaro.org/LEG/Engineering/Kernel/ACPI/GPIOPowerButton Changes since v3: * address Igor's comments on ACPI part * drop "autorepeat" for /gpio-keys Changes since v2: * rebased on upstream QEMU * adjust irq signalling for PowerButton of PATCH 7/8 (Peter Maydell) * Add several Reviewed-bys and Tested-bys from Wei Huang, thanks! Changes since v1: * rewrite GPIO Connection Descriptor (Michael) Shannon Zhao (8): ARM: Virt: Add a GPIO controller ARM: ACPI: Add GPIO controller in ACPI DSDT table ARM: ACPI: Add power button device in ACPI DSDT table ACPI: Add GPIO Connection Descriptor ACPI: Add aml_gpio_int() wrapper for GPIO Interrupt Connection ARM: ACPI: Add _E03 for Power Button ARM: Virt: Add QEMU powerdown notifier and hook it to GPIO Pin 3 ARM: Virt: Add gpio-keys node for Poweroff using DT hw/acpi/aml-build.c | 88 +++++++++++++++++++++++++++++++++++++++++++++ hw/arm/virt-acpi-build.c | 44 +++++++++++++++++++++++ hw/arm/virt.c | 60 +++++++++++++++++++++++++++++++ include/hw/acpi/aml-build.h | 27 ++++++++++++++ include/hw/arm/virt.h | 1 + 5 files changed, 220 insertions(+) -- 2.0.4