[Qemu-devel] [RESEND PATCH v4 04/10] acpi, mem-hotplug: Add acpi_memory_unplug_cb() to implement memory unplug.

[Tang Chen <tangchen@cn.fujitsu.com>]

Add a new bool member named is_removing to MemStatus indicating that
the memory solt is being removed. Set it to true in acpi_memory_unplug_cb(),
and send SCI to guest.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 hw/acpi/memory_hotplug.c         | 15 +++++++++++++++
 include/hw/acpi/memory_hotplug.h |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index 9839963..01dea6c 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -211,6 +211,21 @@ void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
     acpi_memory_hotplug_sci(ar, irq);
 }
 
+void acpi_memory_unplug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
+                           DeviceState *dev, Error **errp)
+{
+    MemStatus *mdev;
+
+    mdev = acpi_memory_get_slot_status_descriptor(mem_st, dev, errp);
+    if (!mdev)
+        return;
+
+    mdev->is_removing = true;
+
+    /* Do ACPI magic */
+    acpi_memory_hotplug_sci(ar, irq);
+}
+
 static const VMStateDescription vmstate_memhp_sts = {
     .name = "memory hotplug device state",
     .version_id = 1,
diff --git a/include/hw/acpi/memory_hotplug.h b/include/hw/acpi/memory_hotplug.h
index 7bbf8a0..fe41268 100644
--- a/include/hw/acpi/memory_hotplug.h
+++ b/include/hw/acpi/memory_hotplug.h
@@ -11,6 +11,7 @@ typedef struct MemStatus {
     DeviceState *dimm;
     bool is_enabled;
     bool is_inserting;
+    bool is_removing;
     uint32_t ost_event;
     uint32_t ost_status;
 } MemStatus;
@@ -28,6 +29,8 @@ void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 
 void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
                          DeviceState *dev, Error **errp);
+void acpi_memory_unplug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
+                           DeviceState *dev, Error **errp);
 
 extern const VMStateDescription vmstate_memory_hotplug;
 #define VMSTATE_MEMORY_HOTPLUG(memhp, state) \
-- 
1.8.4.2