Hi，
This makes ACPI work well but makes DT not work. The reason is systemd or
acpid open /dev/input/event0 failed. So the interrupt could be injected and
could see under /proc/interrupts but guest doesn't have any action. I'll
investigate why it opens failed later.
2016年1月29日星期五，Wei Huang <w...@redhat.com> 写道：
> When QEMU is hook'ed up with libvirt/virsh, the first ACPI reboot
> request will succeed; but the following shutdown/reboot requests
> fail to trigger VMs to react. Notice that in mach-virt machine
> model GPIO is defined as edge-triggered and active-high in ACPI.
> This patch changes the behavior of powerdown notifier from PULLUP
> to PULSE. It solves the problem described above (i.e. reboot
> continues to work).
>
> Signed-off-by: Wei Huang <w...@redhat.com <javascript:;>>
> ---
> hw/arm/virt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 05f9087..b5468a9 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -546,7 +546,7 @@ static DeviceState *pl061_dev;
> static void virt_powerdown_req(Notifier *n, void *opaque)
> {
> /* use gpio Pin 3 for power button event */
> - qemu_set_irq(qdev_get_gpio_in(pl061_dev, 3), 1);
> + qemu_irq_pulse(qdev_get_gpio_in(pl061_dev, 3));
> }
>
> static Notifier virt_system_powerdown_notifier = {
> --
> 1.8.3.1
>
>
