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qapi: report the default CPU type for each machine 

When user doesn't request any explicit CPU model with libvirt or QEMU,
a machine type specific CPU model is picked. Currently there is no way
to determine what this QEMU built-in default is, so libvirt cannot
report this back to the user in the XML config.

This extends the "query-machines" QMP command so that it reports the
default CPU model typename for each machine.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20190822100412.23746-1-berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
master
Daniel P. Berrangé 2019-08-22 11:04:12 +01:00 committed by Eduardo Habkost
parent fea374e7c8
commit 04109957d4
2 changed files with 8 additions and 1 deletions
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4
hw/core/machine-qmp-cmds.c
View File

@ -230,6 +230,10 @@ MachineInfoList *qmp_query_machines(Error **errp)
info->hotpluggable_cpus = mc->has_hotpluggable_cpus;
info->numa_mem_supported = mc->numa_mem_supported;
info->deprecated = !!mc->deprecation_reason;
if (mc->default_cpu_type) {
info->default_cpu_type = g_strdup(mc->default_cpu_type);
info->has_default_cpu_type = true;
}
entry = g_malloc0(sizeof(*entry));
entry->value = info;

5
qapi/machine.json
View File

@ -348,13 +348,16 @@
# in future versions of QEMU according to the QEMU deprecation
# policy (since 4.1.0)
#
# @default-cpu-type: default CPU model typename if none is requested via
# the -cpu argument. (since 4.2)
#
# Since: 1.2.0
##
{ 'struct': 'MachineInfo',
'data': { 'name': 'str', '*alias': 'str',
'*is-default': 'bool', 'cpu-max': 'int',
'hotpluggable-cpus': 'bool', 'numa-mem-supported': 'bool',
'deprecated': 'bool' } }
'deprecated': 'bool', '*default-cpu-type': 'str' } }
##
# @query-machines: