[PATCH-for-4.2,v11,06/11] hw/arm/virt-acpi-build: Add PC-DIMM in SRAT

Commit Message

Shameerali Kolothum Thodi Sept. 18, 2019, 1:06 p.m. UTC

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 <[e-mail]>
Signed-off-by: Eric Auger <[e-mail]>
Reviewed-by: Igor Mammedov <[e-mail]>
---
 hw/arm/virt-acpi-build.c | 8 ++++++++
 hw/arm/virt.c            | 2 ++
 2 files changed, 10 insertions(+)

Patch

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index cadeea0f41..c97661ad68 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/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);
 }
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index f926477ba5..d221841c42 100644
--- a/hw/arm/virt.c
+++ b/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)