qapi: add query-cpu-definitions command (v2)

This command attempts to map to the behavior of -cpu ?.  Unfortunately, the
output of this command differs wildly across targets.

To accommodate this, we use a weak symbol to implement a default version of the
command that fails with a QERR_NOT_SUPPORTED error code.  Targets can then
override and implement this command if it makes sense for them.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/qmp.c b/qmp.c
index 254a32fd76..6c1e4e8978 100644
--- a/qmp.c
+++ b/qmp.c
@@ -467,3 +467,9 @@ DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 
     return prop_list;
 }
+
+CpuDefinitionInfoList GCC_WEAK *qmp_query_cpu_definitions(Error **errp)
+{
+    error_set(errp, QERR_NOT_SUPPORTED);
+    return NULL;
+}