[Qemu-devel] [PULL 029/103] pc: propagate memory hotplug event to ACPI device

[Michael S. Tsirkin]

From: Igor Mammedov <address@hidden>

Notify PIIX4_PM/ICH9LPC device about hotplug event,
so that it would send SCI to guest notifying about
newly added memory.

Signed-off-by: Igor Mammedov <address@hidden>
Acked-by: Peter Crosthwaite <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
 hw/i386/pc.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 538a8db..ffecb33 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1553,6 +1553,7 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev,
                          DeviceState *dev, Error **errp)
 {
     int slot;
+    HotplugHandlerClass *hhc;
     Error *local_err = NULL;
     PCMachineState *pcms = PC_MACHINE(hotplug_dev);
     MachineState *machine = MACHINE(hotplug_dev);
@@ -1595,9 +1596,18 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev,
     }
     trace_mhp_pc_dimm_assigned_slot(slot);
 
+    if (!pcms->acpi_dev) {
+        error_setg(&local_err,
+                   "memory hotplug is not enabled: missing acpi device");
+        goto out;
+    }
+
     memory_region_add_subregion(&pcms->hotplug_memory,
                                 addr - pcms->hotplug_memory_base, mr);
     vmstate_register_ram(mr, dev);
+
+    hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
+    hhc->plug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
 out:
     error_propagate(errp, local_err);
 }
-- 
MST