[Qemu-devel] [RESEND PATCH v4 4/6] acpi, mem-hotplug: Add unplug cb for memory device

[Zhu Guihua]

From: Tang Chen <address@hidden>

This patch adds unplug cb for memory device. It resets some memory status
in acpi_memory_unplug_cb().

Signed-off-by: Tang Chen <address@hidden>
Signed-off-by: Zhu Guihua <address@hidden>
---
 hw/acpi/ich9.c                   |  9 +++++++--
 hw/acpi/memory_hotplug.c         | 14 ++++++++++++++
 hw/acpi/piix4.c                  | 10 ++++++++--
 include/hw/acpi/memory_hotplug.h |  2 ++
 4 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index b85eed4..84e5bb8 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -413,8 +413,13 @@ void ich9_pm_device_unplug_request_cb(ICH9LPCPMRegs *pm, 
DeviceState *dev,
 void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
                               Error **errp)
 {
-    error_setg(errp, "acpi: device unplug for not supported device"
-               " type: %s", object_get_typename(OBJECT(dev)));
+    if (pm->acpi_memory_hotplug.is_enabled &&
+        object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+        acpi_memory_unplug_cb(&pm->acpi_memory_hotplug, dev, errp);
+    } else {
+        error_setg(errp, "acpi: device unplug for not supported device"
+                   " type: %s", object_get_typename(OBJECT(dev)));
+    }
 }
 
 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index 2ef6a94..687b2f1 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -227,6 +227,20 @@ void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq 
irq,
     acpi_update_sci(ar, irq);
 }
 
+void acpi_memory_unplug_cb(MemHotplugState *mem_st,
+                           DeviceState *dev, Error **errp)
+{
+    MemStatus *mdev;
+
+    mdev = acpi_memory_slot_status(mem_st, dev, errp);
+    if (!mdev) {
+        return;
+    }
+
+    mdev->is_enabled = false;
+    mdev->dimm = NULL;
+}
+
 static const VMStateDescription vmstate_memhp_sts = {
     .name = "memory hotplug device state",
     .version_id = 1,
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index f716e91..781ad33 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -377,8 +377,14 @@ static void piix4_device_unplug_request_cb(HotplugHandler 
*hotplug_dev,
 static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
                                    DeviceState *dev, Error **errp)
 {
-    error_setg(errp, "acpi: device unplug for not supported device"
-               " type: %s", object_get_typename(OBJECT(dev)));
+    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
+
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+        acpi_memory_unplug_cb(&s->acpi_memory_hotplug, dev, errp);
+    } else {
+        error_setg(errp, "acpi: device unplug for not supported device"
+                   " type: %s", object_get_typename(OBJECT(dev)));
+    }
 }
 
 static void piix4_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
diff --git a/include/hw/acpi/memory_hotplug.h b/include/hw/acpi/memory_hotplug.h
index c437a85..15deae0 100644
--- a/include/hw/acpi/memory_hotplug.h
+++ b/include/hw/acpi/memory_hotplug.h
@@ -32,6 +32,8 @@ void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, 
MemHotplugState *mem_st,
 void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq,
                                    MemHotplugState *mem_st,
                                    DeviceState *dev, Error **errp);
+void acpi_memory_unplug_cb(MemHotplugState *mem_st,
+                           DeviceState *dev, Error **errp);
 
 extern const VMStateDescription vmstate_memory_hotplug;
 #define VMSTATE_MEMORY_HOTPLUG(memhp, state) \
-- 
1.9.3