hw/acpi: Move QMP command to hw/core/

The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

qmp_query_vm_generation_id() in stubs/vmgenid.c is the last user of
QERR_UNSUPPORTED outside qga/.  Unlike the stubs we just dropped, it
is actually reachable, namely when CONFIG_ACPI_VMGENID is off.  It
always fails like

    (qemu) info vm-generation-id
    Error: this feature or command is not currently supported

Turns out the real qmp_query_vm_generation_id() doesn't actually
depend on CONFIG_ACPI_VMGENID, and fails safely when it's off.  Move
it to hw/core/machine-qmp-cmds.c, and drop the stub.  The error
message becomes

    Error: VM Generation ID device not found

Feels like an improvement to me.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-8-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>

1 files changed, 0 insertions, 18 deletions

diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c
index 0c9f158ac9..a39315c1b3 100644
--- a/hw/acpi/vmgenid.c
+++ b/hw/acpi/vmgenid.c
@@ -12,7 +12,6 @@
 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
-#include "qapi/qapi-commands-machine.h"
 #include "qemu/module.h"
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/aml-build.h"
@@ -244,20 +243,3 @@ static void vmgenid_register_types(void)
 }
 
 type_init(vmgenid_register_types)
-
-GuidInfo *qmp_query_vm_generation_id(Error **errp)
-{
-    GuidInfo *info;
-    VmGenIdState *vms;
-    Object *obj = find_vmgenid_dev();
-
-    if (!obj) {
-        error_setg(errp, "VM Generation ID device not found");
-        return NULL;
-    }
-    vms = VMGENID(obj);
-
-    info = g_malloc0(sizeof(*info));
-    info->guid = qemu_uuid_unparse_strdup(&vms->guid);
-    return info;
-}