[Qemu-arm] [PATCH-for-4.2 v9 07/12] hw/arm/virt-acpi-build: Add PC-DIMM in SRAT

[Shameer Kolothum]

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: Shameer Kolothum <address@hidden>
Signed-off-by: Eric Auger <address@hidden>
Reviewed-by: Igor Mammedov <address@hidden>
---
v8 --> v9
 - Added auto_enable_numa_with_memhp support.

---
 hw/arm/virt-acpi-build.c | 9 +++++++++
 hw/arm/virt.c            | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 63fa845076..6d697af2df 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -518,6 +518,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, 
VirtMachineState *vms)
     int i, srat_start;
     uint64_t mem_base;
     MachineClass *mc = MACHINE_GET_CLASS(vms);
+    MachineState *ms = MACHINE(vms);
     const CPUArchIdList *cpu_list = mc->possible_cpu_arch_ids(MACHINE(vms));
 
     srat_start = table_data->len;
@@ -543,6 +544,14 @@ 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),
+                          nb_numa_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);
 }
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 0949a227a9..56d64fc0a9 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2049,6 +2049,7 @@ 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)
@@ -2154,6 +2155,7 @@ 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)
 
-- 
2.17.1