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[Qemu-devel] [PATCH 6/7] hw/arm/virt: Add QEMU powerdown notifier and ho
From: |
shannon . zhao |
Subject: |
[Qemu-devel] [PATCH 6/7] hw/arm/virt: Add QEMU powerdown notifier and hook it to GPIO Pin 3 |
Date: |
Tue, 12 May 2015 12:24:15 +0800 |
From: Shannon Zhao <address@hidden>
Currently mach-virt model doesn't support powerdown request. Guest VM
doesn't react to system_powerdown from monitor console (or QMP) because
there is no communication mechanism for such requests. This patch registers
GPIO Pin 3 with powerdown notification. So guest VM can receive notification
when such powerdown request is triggered.
Signed-off-by: Wei Huang <address@hidden>
Signed-off-by: Shannon Zhao <address@hidden>
Signed-off-by: Shannon Zhao <address@hidden>
---
hw/arm/virt.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 3511903..354b020 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -432,6 +432,18 @@ static void create_rtc(const VirtBoardInfo *vbi, qemu_irq
*pic)
g_free(nodename);
}
+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), 0);
+ qemu_set_irq(qdev_get_gpio_in(pl061_dev, 3), 1);
+}
+
+static Notifier virt_system_powerdown_notifier = {
+ .notify = virt_powerdown_req
+};
+
static void create_gpio(const VirtBoardInfo *vbi, qemu_irq *pic)
{
char *nodename;
@@ -440,7 +452,7 @@ static void create_gpio(const VirtBoardInfo *vbi, qemu_irq
*pic)
int irq = vbi->irqmap[VIRT_GPIO];
const char compat[] = "arm,pl061";
- sysbus_create_simple("pl061", base, pic[irq]);
+ pl061_dev = sysbus_create_simple("pl061", base, pic[irq]);
nodename = g_strdup_printf("/address@hidden" PRIx64, base);
qemu_fdt_add_subnode(vbi->fdt, nodename);
@@ -455,6 +467,9 @@ static void create_gpio(const VirtBoardInfo *vbi, qemu_irq
*pic)
qemu_fdt_setprop_cell(vbi->fdt, nodename, "clocks", vbi->clock_phandle);
qemu_fdt_setprop_string(vbi->fdt, nodename, "clock-names", "apb_pclk");
+ /* connect powerdown request */
+ qemu_register_powerdown_notifier(&virt_system_powerdown_notifier);
+
g_free(nodename);
}
--
2.1.0
- [Qemu-devel] [PATCH 0/7] Add system_powerdown support on ARM through ACPI and DT, shannon . zhao, 2015/05/12
- [Qemu-devel] [PATCH 1/7] hw/arm/virt: Add a GPIO controller, shannon . zhao, 2015/05/12
- [Qemu-devel] [PATCH 2/7] hw/arm/virt-acpi-build: Add GPIO controller in ACPI DSDT table, shannon . zhao, 2015/05/12
- [Qemu-devel] [PATCH 3/7] hw/arm/virt-acpi-build: Add power button device in ACPI DSDT table, shannon . zhao, 2015/05/12
- [Qemu-devel] [PATCH 4/7] hw/acpi/aml-build: Add aml_gpio_int() term, shannon . zhao, 2015/05/12
- [Qemu-devel] [PATCH 5/7] hw/arm/virt-acpi-build: Add _E03 for Power Button, shannon . zhao, 2015/05/12
- [Qemu-devel] [PATCH 6/7] hw/arm/virt: Add QEMU powerdown notifier and hook it to GPIO Pin 3,
shannon . zhao <=
- [Qemu-devel] [PATCH 7/7] hw/arm/virt: Add gpio-keys node for Poweroff using DT, shannon . zhao, 2015/05/12