diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 2cd2fee..5e29be4 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -583,6 +583,21 @@ static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
     acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
 }
 
+static ACPIREGS *piix4_acpi_regs(AcpiDeviceIf *adev)
+{
+    PIIX4PMState *s = PIIX4_PM(adev);
+
+    return &s->ar;
+}
+
+static qemu_irq piix4_acpi_irq(AcpiDeviceIf *adev)
+{
+    PIIX4PMState *s = PIIX4_PM(adev);
+
+    return s->irq;
+}
+
+
 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),
@@ -621,6 +636,8 @@ 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->regs = piix4_acpi_regs;
+    adevc->sci = piix4_acpi_irq;
 }
 
 static const TypeInfo piix4_pm_info = {
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index ed9907d..9d60caa 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -700,6 +700,20 @@ static Property ich9_lpc_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static ACPIREGS *ich9_acpi_regs(AcpiDeviceIf *adev)
+{
+    ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
+
+    return &s->pm.acpi_regs;
+}
+
+static qemu_irq ich9_acpi_irq(AcpiDeviceIf *adev)
+{
+    ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
+
+    return s->pm.irq;
+}
+
 static void ich9_lpc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -727,6 +741,8 @@ 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->regs = ich9_acpi_regs;
+    adevc->sci = ich9_acpi_irq;
 }
 
 static const TypeInfo ich9_lpc_info = {
diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
index 6c2190b..58707d4 100644
--- a/hw/isa/vt82c686.c
+++ b/hw/isa/vt82c686.c
@@ -391,6 +391,18 @@ I2CBus *vt82c686b_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
     return s->smb.smbus;
 }
 
+static ACPIREGS *via_pm_acpi_regs(AcpiDeviceIf *adev)
+{
+    VT686PMState *s = VT82C686B_PM_DEVICE(adev);
+
+    return &s->ar;
+}
+
+static qemu_irq via_pm_acpi_irq(AcpiDeviceIf *adev)
+{
+    return NULL;
+}
+
 static Property via_pm_properties[] = {
     DEFINE_PROP_UINT32("smb_io_base", VT686PMState, smb_io_base, 0),
     DEFINE_PROP_END_OF_LIST(),
@@ -400,6 +412,7 @@ static void via_pm_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 
     k->realize = vt82c686b_pm_realize;
     k->config_write = pm_write_config;
@@ -411,6 +424,8 @@ static void via_pm_class_init(ObjectClass *klass, void *data)
     dc->vmsd = &vmstate_acpi;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
     dc->props = via_pm_properties;
+    adevc->regs = via_pm_acpi_regs;
+    adevc->sci = via_pm_acpi_irq;
 }
 
 static const TypeInfo via_pm_info = {
@@ -418,6 +433,10 @@ static const TypeInfo via_pm_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(VT686PMState),
     .class_init    = via_pm_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_ACPI_DEVICE_IF },
+        { }
+    },
 };
 
 static const VMStateDescription vmstate_via = {
diff --git a/include/hw/acpi/acpi_dev_interface.h b/include/hw/acpi/acpi_dev_interface.h
index f245f8d..e3f1bad 100644
--- a/include/hw/acpi/acpi_dev_interface.h
+++ b/include/hw/acpi/acpi_dev_interface.h
@@ -3,6 +3,9 @@
 
 #include "qom/object.h"
 #include "qapi-types.h"
+#include "hw/irq.h"
+
+typedef struct ACPIREGS ACPIREGS;
 
 #define TYPE_ACPI_DEVICE_IF "acpi-device-interface"
 
@@ -28,6 +31,10 @@ typedef struct AcpiDeviceIf {
  * ospm_status: returns status of ACPI device objects, reported
  *              via _OST method if device supports it.
  *
+ * regs: returns pointer to ACPI registers block
+ *
+ * sci: return pointer to IRQ object associated with SCI
+ *
  * Interface is designed for providing unified interface
  * to generic ACPI functionality that could be used without
  * knowledge about internals of actual device that implements
@@ -39,5 +46,7 @@ typedef struct AcpiDeviceIfClass {
 
     /* <public> */
     void (*ospm_status)(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
+    ACPIREGS *(*regs)(AcpiDeviceIf *adev);
+    qemu_irq (*sci)(AcpiDeviceIf *adev);
 } AcpiDeviceIfClass;
 #endif
