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qapi: Report support for -device cpu hotplug in query-machines 

For management apps it's very useful to know whether the selected
machine type supports cpu hotplug via the new -device approach. Using
the presence of 'query-hotpluggable-cpus' alone is not enough as a
witness.

Add a property to 'MachineInfo' called 'hotpluggable-cpus' that will
report the presence of this feature.

Example of output:
    {
        "hotpluggable-cpus": false,
        "name": "mac99",
        "cpu-max": 1
    },
    {
        "hotpluggable-cpus": true,
        "name": "pseries-2.7",
        "is-default": true,
        "cpu-max": 255,
        "alias": "pseries"
    },

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Peter Krempa 2016-06-23 23:23:33 +02:00 committed by David Gibson
parent d29f086169
commit 62c9467dff
2 changed files with 5 additions and 1 deletions
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5
qapi-schema.json
View File

@ -2986,11 +2986,14 @@
# @cpu-max: maximum number of CPUs supported by the machine type
# (since 1.5.0)
#
# @hotpluggable-cpus: cpu hotplug via -device is supported (since 2.7.0)
#
# Since: 1.2.0
##
{ 'struct': 'MachineInfo',
'data': { 'name': 'str', '*alias': 'str',
'*is-default': 'bool', 'cpu-max': 'int' } }
'*is-default': 'bool', 'cpu-max': 'int',
'hotpluggable-cpus': 'bool'} }
##
# @query-machines:

1
vl.c
View File

@ -1524,6 +1524,7 @@ MachineInfoList *qmp_query_machines(Error **errp)
info->name = g_strdup(mc->name);
info->cpu_max = !mc->max_cpus ? 1 : mc->max_cpus;
info->hotpluggable_cpus = !!mc->query_hotpluggable_cpus;
entry = g_malloc0(sizeof(*entry));
entry->value = info;