acpi: implement ospm_status() method for PIIX4/ICH9_LPC devices

... using TYPE_ACPI_DEVICE_IF interface.
Which provides status reporting of ACPI declared memory devices
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/acpi/ich9.c

@@ -309,3 +309,10 @@ void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp)
                    " type: %s", object_get_typename(OBJECT(dev)));
     }
 }
+
+void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
+{
+    ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
+
+    acpi_memory_ospm_status(&s->pm.acpi_memory_hotplug, list);
+}

hw/acpi/memory_hotplug.c

@@ -4,6 +4,37 @@
 #include "hw/boards.h"
 #include "trace.h"
 
+static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
+{
+    ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
+
+    info->slot_type = ACPI_SLOT_TYPE_DIMM;
+    info->slot = g_strdup_printf("%d", slot);
+    info->source = mdev->ost_event;
+    info->status = mdev->ost_status;
+    if (mdev->dimm) {
+        DeviceState *dev = DEVICE(mdev->dimm);
+        if (dev->id) {
+            info->device = g_strdup(dev->id);
+            info->has_device = true;
+        }
+    }
+    return info;
+}
+
+void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
+{
+    int i;
+
+    for (i = 0; i < mem_st->dev_count; i++) {
+        ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
+        elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
+        elem->next = NULL;
+        **list = elem;
+        *list = &elem->next;
+    }
+}
+
 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
                                          unsigned int size)
 {

hw/acpi/piix4.c

@@ -35,6 +35,7 @@
 #include "hw/hotplug.h"
 #include "hw/mem/pc-dimm.h"
 #include "hw/acpi/memory_hotplug.h"
+#include "hw/acpi/acpi_dev_interface.h"
 
 //#define DEBUG
 
@@ -572,6 +573,13 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
     }
 }
 
+static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
+{
+    PIIX4PMState *s = PIIX4_PM(adev);
+
+    acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
+}
+
 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),
@@ -589,6 +597,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 
     k->init = piix4_pm_initfn;
     k->config_write = pm_write_config;
@@ -607,6 +616,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
     dc->hotpluggable = false;
     hc->plug = piix4_device_plug_cb;
     hc->unplug = piix4_device_unplug_cb;
+    adevc->ospm_status = piix4_ospm_status;
 }
 
 static const TypeInfo piix4_pm_info = {
@@ -616,6 +626,7 @@ static const TypeInfo piix4_pm_info = {
     .class_init    = piix4_pm_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
+        { TYPE_ACPI_DEVICE_IF },
         { }
     }
 };

hw/isa/lpc_ich9.c

@@ -658,6 +658,7 @@ static void ich9_lpc_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
     dc->reset = ich9_lpc_reset;
@@ -676,6 +677,7 @@ static void ich9_lpc_class_init(ObjectClass *klass, void *data)
     dc->cannot_instantiate_with_device_add_yet = true;
     hc->plug = ich9_device_plug_cb;
     hc->unplug = ich9_device_unplug_cb;
+    adevc->ospm_status = ich9_pm_ospm_status;
 }
 
 static const TypeInfo ich9_lpc_info = {
@@ -686,6 +688,7 @@ static const TypeInfo ich9_lpc_info = {
     .class_init  = ich9_lpc_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_HOTPLUG_HANDLER },
+        { TYPE_ACPI_DEVICE_IF },
         { }
     }
 };

include/hw/acpi/ich9.h

@@ -24,6 +24,7 @@
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/cpu_hotplug.h"
 #include "hw/acpi/memory_hotplug.h"
+#include "hw/acpi/acpi_dev_interface.h"
 
 typedef struct ICH9LPCPMRegs {
     /*
@@ -59,4 +60,6 @@ extern const VMStateDescription vmstate_ich9_pm;
 void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp);
 
 void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp);
+
+void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
 #endif /* HW_ACPI_ICH9_H */

include/hw/acpi/memory_hotplug.h

@@ -34,4 +34,5 @@ extern const VMStateDescription vmstate_memory_hotplug;
     VMSTATE_STRUCT(memhp, state, 1, \
                    vmstate_memory_hotplug, MemHotplugState)
 
+void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list);
 #endif