[Qemu-devel] [PATCH] Add ACPI power button emulation

[Gleb Natapov]

Signed-off-by: Gleb Natapov <address@hidden>
diff --git a/hw/acpi.c b/hw/acpi.c
index 53c1fec..6141522 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -752,6 +752,15 @@ void qemu_system_device_hot_add(int bus, int slot, int 
state)
     }
 }
 
+void qemu_press_power_button(void)
+{
+    gpe.sts |= (1 << 8);
+    if (gpe.en & (1 << 8)) {
+        qemu_set_irq(pm_state->irq, 1);
+        qemu_set_irq(pm_state->irq, 0);
+    }
+}
+
 struct acpi_table_header
 {
     char signature [4];    /* ACPI signature (4 ASCII characters) */
diff --git a/monitor.c b/monitor.c
index b33fea1..35202aa 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1211,6 +1211,11 @@ static void do_system_reset(Monitor *mon)
     qemu_system_reset_request();
 }
 
+static void do_press_pwrb(Monitor *mon)
+{
+    qemu_press_power_button();
+}
+
 static void do_system_powerdown(Monitor *mon)
 {
     qemu_system_powerdown_request();
@@ -1733,6 +1738,7 @@ static const mon_cmd_t mon_cmds[] = {
 #if defined(TARGET_I386)
     { "nmi", "i", do_inject_nmi,
       "cpu", "inject an NMI on the given CPU", },
+    { "press_power_button", "", do_press_pwrb, "", "press power button" },
 #endif
     { "migrate", "-ds", do_migrate,
       "[-d] uri", "migrate to URI (using -d to not wait for completion)" },
diff --git a/pc-bios/bios-pq/0015_add-power_button_aml_object.patch 
b/pc-bios/bios-pq/0015_add-power_button_aml_object.patch
new file mode 100644
index 0000000..7477b71
--- /dev/null
+++ b/pc-bios/bios-pq/0015_add-power_button_aml_object.patch
@@ -0,0 +1,27 @@
+Add power button device object to AML.
+
+diff --git a/bios/acpi-dsdt.dsl b/bios/acpi-dsdt.dsl
+index 7bff30a..0ca129d 100644
+--- a/bios/acpi-dsdt.dsl
++++ b/bios/acpi-dsdt.dsl
+@@ -38,6 +38,11 @@ DefinitionBlock (
+ 
+     /* PCI Bus definition */
+     Scope(\_SB) {
++        Device (PWRB) {
++            Name (_HID, EisaId ("PNP0C0C"))
++            Name (_STA, 0x0B)
++        }
++
+         Device(PCI0) {
+             Name (_HID, EisaId ("PNP0A03"))
+             Name (_ADR, 0x00)
+@@ -724,7 +729,7 @@ DefinitionBlock (
+             Return(0x01)
+         }
+         Method(_L08) {
+-            Return(0x01)
++            Notify(\_SB.PWRB, 0x80)
+         }
+         Method(_L09) {
+             Return(0x01)
diff --git a/pc-bios/bios-pq/series b/pc-bios/bios-pq/series
index fdef179..85e587e 100644
--- a/pc-bios/bios-pq/series
+++ b/pc-bios/bios-pq/series
@@ -12,3 +12,4 @@
 0012-load-smbios-entries-and-files-from-qemu.patch
 0013_fix-non-acpi-timer-interrupt-routing.patch
 0014_add-srat-acpi-table-support.patch
+015_add-power_button_aml_object.patch
diff --git a/sysemu.h b/sysemu.h
index 50438a6..a8abb3c 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -38,6 +38,8 @@ void qemu_system_powerdown_request(void);
 int qemu_shutdown_requested(void);
 int qemu_reset_requested(void);
 int qemu_powerdown_requested(void);
+void qemu_press_power_button(void);
+
 #if !defined(TARGET_SPARC) && !defined(TARGET_I386)
 // Please implement a power failure function to signal the OS
 #define qemu_system_powerdown() do{}while(0)
--
                        Gleb.