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pc: Implement query-hotpluggable-cpus callback

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it returns a list of present/possible to hotplug CPU
objects with a list of properties to use with
device_add.

in PC case returned list would looks like:
-> { "execute": "query-hotpluggable-cpus" }
<- {"return": [
     {
        "type": "qemu64-x86_64-cpu", "vcpus-count": 1,
        "props": {"core-id": 0, "socket-id": 1, "thread-id": 0}
     },
     {
        "qom-path": "/machine/unattached/device[0]",
        "type": "qemu64-x86_64-cpu", "vcpus-count": 1,
        "props": {"core-id": 0, "socket-id": 0, "thread-id": 0}
     }
   ]}

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Igor Mammedov 2016-06-22 11:11:42 +02:00 committed by Eduardo Habkost
parent edd1211194
commit 4d952914a0
2 changed files with 60 additions and 0 deletions
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45
hw/i386/pc.c
View File

@ -2236,6 +2236,50 @@ static CPUArchIdList *pc_possible_cpu_arch_ids(MachineState *machine)
return list;
}
static HotpluggableCPUList *pc_query_hotpluggable_cpus(MachineState *machine)
{
int i;
CPUState *cpu;
HotpluggableCPUList *head = NULL;
PCMachineState *pcms = PC_MACHINE(machine);
const char *cpu_type;
cpu = pcms->possible_cpus->cpus[0].cpu;
assert(cpu); /* BSP is always present */
cpu_type = object_class_get_name(OBJECT_CLASS(CPU_GET_CLASS(cpu)));
for (i = 0; i < pcms->possible_cpus->len; i++) {
X86CPUTopoInfo topo;
HotpluggableCPUList *list_item = g_new0(typeof(*list_item), 1);
HotpluggableCPU *cpu_item = g_new0(typeof(*cpu_item), 1);
CpuInstanceProperties *cpu_props = g_new0(typeof(*cpu_props), 1);
const uint32_t apic_id = pcms->possible_cpus->cpus[i].arch_id;
x86_topo_ids_from_apicid(apic_id, smp_cores, smp_threads, &topo);
cpu_item->type = g_strdup(cpu_type);
cpu_item->vcpus_count = 1;
cpu_props->has_socket_id = true;
cpu_props->socket_id = topo.pkg_id;
cpu_props->has_core_id = true;
cpu_props->core_id = topo.core_id;
cpu_props->has_thread_id = true;
cpu_props->thread_id = topo.smt_id;
cpu_item->props = cpu_props;
cpu = pcms->possible_cpus->cpus[i].cpu;
if (cpu) {
cpu_item->has_qom_path = true;
cpu_item->qom_path = object_get_canonical_path(OBJECT(cpu));
}
list_item->value = cpu_item;
list_item->next = head;
head = list_item;
}
return head;
}
static void x86_nmi(NMIState *n, int cpu_index, Error **errp)
{
/* cpu index isn't used */
@ -2276,6 +2320,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
mc->get_hotplug_handler = pc_get_hotpug_handler;
mc->cpu_index_to_socket_id = pc_cpu_index_to_socket_id;
mc->possible_cpu_arch_ids = pc_possible_cpu_arch_ids;
mc->query_hotpluggable_cpus = pc_query_hotpluggable_cpus;
mc->default_boot_order = "cad";
mc->hot_add_cpu = pc_hot_add_cpu;
mc->max_cpus = 255;

15
qmp-commands.hx
View File

@ -5026,3 +5026,18 @@ Example for pseries machine type started with
{ "props": { "core-id": 0 }, "type": "POWER8-spapr-cpu-core",
"vcpus-count": 1, "qom-path": "/machine/unattached/device[0]"}
]}'
Example for pc machine type started with
-smp 1,maxcpus=2:
-> { "execute": "query-hotpluggable-cpus" }
<- {"return": [
{
"type": "qemu64-x86_64-cpu", "vcpus-count": 1,
"props": {"core-id": 0, "socket-id": 1, "thread-id": 0}
},
{
"qom-path": "/machine/unattached/device[0]",
"type": "qemu64-x86_64-cpu", "vcpus-count": 1,
"props": {"core-id": 0, "socket-id": 0, "thread-id": 0}
}
]}