acpi: extend ACPI interface to provide send_event hook

send_event() hook will allow to send ACPI event in
a target specific way (GPE or GPIO based impl.)
it will also simplify proxy wrappers in piix4pm/ich9
that access ACPI regs and SCI which are part of
piix4pm/lcp_ich9 devices and call acpi_foo() API directly.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>

hw/acpi/acpi_interface.c

@@ -2,6 +2,15 @@
 #include "hw/acpi/acpi_dev_interface.h"
 #include "qemu/module.h"
 
+void acpi_send_event(DeviceState *dev, AcpiEventStatusBits event)
+{
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(dev);
+    if (adevc->send_event) {
+        AcpiDeviceIf *adev = ACPI_DEVICE_IF(dev);
+        adevc->send_event(adev, event);
+    }
+}
+
 static void register_types(void)
 {
     static const TypeInfo acpi_dev_if_info = {

hw/acpi/core.c

@@ -698,7 +698,7 @@ uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr)
 }
 
 void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
-                         AcpiGPEStatusBits status)
+                         AcpiEventStatusBits status)
 {
     ar->gpe.sts[0] |= status;
     acpi_update_sci(ar, irq);

hw/acpi/piix4.c

@@ -586,6 +586,13 @@ static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
     acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
 }
 
+static void piix4_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
+{
+    PIIX4PMState *s = PIIX4_PM(adev);
+
+    acpi_send_gpe_event(&s->ar, s->irq, ev);
+}
+
 static Property piix4_pm_properties[] = {
     DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
     DEFINE_PROP_UINT8(ACPI_PM_PROP_S3_DISABLED, PIIX4PMState, disable_s3, 0),
@@ -624,6 +631,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
     hc->unplug_request = piix4_device_unplug_request_cb;
     hc->unplug = piix4_device_unplug_cb;
     adevc->ospm_status = piix4_ospm_status;
+    adevc->send_event = piix4_send_gpe;
 }
 
 static const TypeInfo piix4_pm_info = {

hw/isa/lpc_ich9.c

@@ -703,6 +703,13 @@ static Property ich9_lpc_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static void ich9_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
+{
+    ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
+
+    acpi_send_gpe_event(&s->pm.acpi_regs, s->pm.irq, ev);
+}
+
 static void ich9_lpc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -730,6 +737,7 @@ static void ich9_lpc_class_init(ObjectClass *klass, void *data)
     hc->unplug_request = ich9_device_unplug_request_cb;
     hc->unplug = ich9_device_unplug_cb;
     adevc->ospm_status = ich9_pm_ospm_status;
+    adevc->send_event = ich9_send_gpe;
 }
 
 static const TypeInfo ich9_lpc_info = {

include/hw/acpi/acpi.h

@@ -23,6 +23,7 @@
 #include "qemu/option.h"
 #include "exec/memory.h"
 #include "hw/irq.h"
+#include "hw/acpi/acpi_dev_interface.h"
 
 /*
  * current device naming scheme supports up to 256 memory devices
@@ -89,13 +90,6 @@
 /* PM2_CNT */
 #define ACPI_BITMASK_ARB_DISABLE                0x0001
 
-/* These values are part of guest ABI, and can not be changed */
-typedef enum {
-    ACPI_PCI_HOTPLUG_STATUS = 2,
-    ACPI_CPU_HOTPLUG_STATUS = 4,
-    ACPI_MEMORY_HOTPLUG_STATUS = 8,
-} AcpiGPEStatusBits;
-
 /* structs */
 typedef struct ACPIPMTimer ACPIPMTimer;
 typedef struct ACPIPM1EVT ACPIPM1EVT;
@@ -172,7 +166,7 @@ void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val);
 uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr);
 
 void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
-                         AcpiGPEStatusBits status);
+                         AcpiEventStatusBits status);
 
 void acpi_update_sci(ACPIREGS *acpi_regs, qemu_irq irq);
 

include/hw/acpi/acpi_dev_interface.h

@@ -4,6 +4,13 @@
 #include "qom/object.h"
 #include "qapi-types.h"
 
+/* These values are part of guest ABI, and can not be changed */
+typedef enum {
+    ACPI_PCI_HOTPLUG_STATUS = 2,
+    ACPI_CPU_HOTPLUG_STATUS = 4,
+    ACPI_MEMORY_HOTPLUG_STATUS = 8,
+} AcpiEventStatusBits;
+
 #define TYPE_ACPI_DEVICE_IF "acpi-device-interface"
 
 #define ACPI_DEVICE_IF_CLASS(klass) \
@@ -22,11 +29,14 @@ typedef struct AcpiDeviceIf {
     Object Parent;
 } AcpiDeviceIf;
 
+void acpi_send_event(DeviceState *dev, AcpiEventStatusBits event);
+
 /**
  * AcpiDeviceIfClass:
  *
  * ospm_status: returns status of ACPI device objects, reported
  *              via _OST method if device supports it.
+ * send_event: inject a specified event into guest
  *
  * Interface is designed for providing unified interface
  * to generic ACPI functionality that could be used without
@@ -39,5 +49,6 @@ typedef struct AcpiDeviceIfClass {
 
     /* <public> */
     void (*ospm_status)(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
+    void (*send_event)(AcpiDeviceIf *adev, AcpiEventStatusBits ev);
 } AcpiDeviceIfClass;
 #endif