From 4bedd8495b47edbeed8389b631b0ee42bb17e0ef Mon Sep 17 00:00:00 2001 From: Shannon Zhao Date: Thu, 17 Dec 2015 13:37:14 +0000 Subject: [PATCH] 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 Signed-off-by: Shannon Zhao Signed-off-by: Shannon Zhao Reviewed-by: Wei Huang Tested-by: Wei Huang Message-id: 1449804086-3464-10-git-send-email-zhaoshenglong@huawei.com Signed-off-by: Peter Maydell --- hw/arm/virt.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 7977e3ce14..cb1d45bcaf 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -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); } -- 2.42.0