Re: [Qemu-devel] [PATCH v4 1/3] machine: show if CLI option '-numa node, mem' is supported in QAPI schema

[Eduardo Habkost <ehabkost@redhat.com>]

On Fri, Jun 07, 2019 at 07:39:17PM +0200, Markus Armbruster wrote:
> This is correct when the TYPE_VIRT_MACHINE, TYPE_PC_MACHINE and
> TYPE_SPAPR_MACHINE are exactly the machines supporting NUMA.  How could
> I check that?

parse_numa_node() rejects the -numa option if the machine doesn't
implement MachineClass::get_default_cpu_node_id().

Grepping for it:

$ git grep -pw get_default_cpu_node_id
hw/arm/virt.c=static void virt_machine_class_init(ObjectClass *oc, void *data)
hw/arm/virt.c:    mc->get_default_cpu_node_id = virt_get_default_cpu_node_id;
hw/core/machine.c=static void machine_numa_finish_cpu_init(MachineState *machine)
hw/core/machine.c:            props.node_id = mc->get_default_cpu_node_id(machine, i);
hw/i386/pc.c=static void pc_machine_class_init(ObjectClass *oc, void *data)
hw/i386/pc.c:    mc->get_default_cpu_node_id = pc_get_default_cpu_node_id;
hw/ppc/spapr.c=static void spapr_machine_class_init(ObjectClass *oc, void *data)
hw/ppc/spapr.c:    mc->get_default_cpu_node_id = spapr_get_default_cpu_node_id;
include/hw/boards.h=typedef struct {
include/hw/boards.h: * @get_default_cpu_node_id:
include/hw/boards.h=struct MachineClass {
include/hw/boards.h:    int64_t (*get_default_cpu_node_id)(const MachineState *ms, int idx);
numa.c=static void parse_numa_node(MachineState *ms, NumaNodeOptions *node,
numa.c:    if (!mc->cpu_index_to_instance_props || !mc->get_default_cpu_node_id) {


Related:
  [PATCH v4 01/11] numa: move numa global variable nb_numa_nodes into MachineState
which adds a MachineClass::numa_supported flag to those machines.

-- 
Eduardo