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ARM: Virt: Add QEMU powerdown notifier and hook it to GPIO Pin 3 

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 <wei@redhat.com>
Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Wei Huang <wei@redhat.com>
Tested-by: Wei Huang <wei@redhat.com>
Message-id: 1449804086-3464-10-git-send-email-zhaoshenglong@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Shannon Zhao 2015-12-17 13:37:14 +00:00 committed by Peter Maydell
parent c1a158b7ed
commit 4bedd8495b
1 changed files with 15 additions and 1 deletions
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16
hw/arm/virt.c
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@ -540,6 +540,17 @@ 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), 1);
}
static Notifier virt_system_powerdown_notifier = {
.notify = virt_powerdown_req
};
static void create_gpio(const VirtBoardInfo *vbi, qemu_irq *pic)
{
char *nodename;
@ -548,7 +559,7 @@ static void create_gpio(const VirtBoardInfo *vbi, qemu_irq *pic)
int irq = vbi->irqmap[VIRT_GPIO];
const char compat[] = "arm,pl061\0arm,primecell";
sysbus_create_simple("pl061", base, pic[irq]);
pl061_dev = sysbus_create_simple("pl061", base, pic[irq]);
nodename = g_strdup_printf("/pl061@%" PRIx64, base);
qemu_fdt_add_subnode(vbi->fdt, nodename);
@ -563,6 +574,9 @@ 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);
}