hw/arm/virt-acpi-build: Add PC-DIMM in SRAT

Generate Memory Affinity Structures for PC-DIMM ranges.

Also, Linux and Windows need ACPI SRAT table to make memory hotplug
work properly, however currently QEMU doesn't create SRAT table if
numa options aren't present on CLI. Hence add support(>=4.2) to
create numa node automatically (auto_enable_numa_with_memhp) when
QEMU is started with memory hotplug enabled but without '-numa'
options on CLI.
Signed-off-by: NShameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: NEric Auger <eric.auger@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Message-Id: <20190918130633.4872-7-shameerali.kolothum.thodi@huawei.com>
Acked-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/arm/virt-acpi-build.c

@@ -546,6 +546,14 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
         }
     }
 
+    if (ms->device_memory) {
+        numamem = acpi_data_push(table_data, sizeof *numamem);
+        build_srat_memory(numamem, ms->device_memory->base,
+                          memory_region_size(&ms->device_memory->mr),
+                          ms->numa_state->num_nodes - 1,
+                          MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
+    }
+
     build_header(linker, table_data, (void *)(table_data->data + srat_start),
                  "SRAT", table_data->len - srat_start, 3, NULL, NULL);
 }

hw/arm/virt.c

@@ -2051,6 +2051,7 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
     hc->plug = virt_machine_device_plug_cb;
     hc->unplug_request = virt_machine_device_unplug_request_cb;
     mc->numa_mem_supported = true;
+    mc->auto_enable_numa_with_memhp = true;
 }
 
 static void virt_instance_init(Object *obj)
@@ -2156,6 +2157,7 @@ static void virt_machine_4_1_options(MachineClass *mc)
     virt_machine_4_2_options(mc);
     compat_props_add(mc->compat_props, hw_compat_4_1, hw_compat_4_1_len);
     vmc->no_ged = true;
+    mc->auto_enable_numa_with_memhp = false;
 }
 DEFINE_VIRT_MACHINE(4, 1)