qemu/target/loongarch/loongarch-qmp-cmds.c
Song Gao 31f694b911 target/loongarch: Implement query-cpu-model-expansion
Add support for the query-cpu-model-expansion QMP command to LoongArch.
We support query the cpu features.

  e.g
    la464 and max cpu support LSX/LASX, default enable,
    la132 not support LSX/LASX.

    1. start with '-cpu max,lasx=off'

    (QEMU) query-cpu-model-expansion type=static  model={"name":"max"}
    {"return": {"model": {"name": "max", "props": {"lasx": false, "lsx": true}}}}

    2. start with '-cpu la464,lasx=off'
    (QEMU) query-cpu-model-expansion type=static  model={"name":"la464"}
    {"return": {"model": {"name": "max", "props": {"lasx": false, "lsx": true}}}

    3. start with '-cpu la132,lasx=off'
    qemu-system-loongarch64: can't apply global la132-loongarch-cpu.lasx=off: Property 'la132-loongarch-cpu.lasx' not found

    4. start with '-cpu max,lasx=off' or start with '-cpu la464,lasx=off' query cpu model la132
    (QEMU) query-cpu-model-expansion type=static  model={"name":"la132"}
    {"return": {"model": {"name": "la132"}}}

Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231020084925.3457084-4-gaosong@loongson.cn>
2023-11-03 14:13:07 +08:00

102 lines
2.8 KiB
C

/*
* QEMU LoongArch CPU (monitor definitions)
*
* SPDX-FileCopyrightText: 2021 Loongson Technology Corporation Limited
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-machine-target.h"
#include "cpu.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qobject-input-visitor.h"
#include "qom/qom-qobject.h"
static void loongarch_cpu_add_definition(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
CpuDefinitionInfoList **cpu_list = user_data;
CpuDefinitionInfo *info = g_new0(CpuDefinitionInfo, 1);
const char *typename = object_class_get_name(oc);
info->name = g_strndup(typename,
strlen(typename) - strlen("-" TYPE_LOONGARCH_CPU));
info->q_typename = g_strdup(typename);
QAPI_LIST_PREPEND(*cpu_list, info);
}
CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
{
CpuDefinitionInfoList *cpu_list = NULL;
GSList *list;
list = object_class_get_list(TYPE_LOONGARCH_CPU, false);
g_slist_foreach(list, loongarch_cpu_add_definition, &cpu_list);
g_slist_free(list);
return cpu_list;
}
static const char *cpu_model_advertised_features[] = {
"lsx", "lasx", NULL
};
CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
CpuModelInfo *model,
Error **errp)
{
CpuModelExpansionInfo *expansion_info;
QDict *qdict_out;
ObjectClass *oc;
Object *obj;
const char *name;
int i;
if (type != CPU_MODEL_EXPANSION_TYPE_STATIC) {
error_setg(errp, "The requested expansion type is not supported");
return NULL;
}
oc = cpu_class_by_name(TYPE_LOONGARCH_CPU, model->name);
if (!oc) {
error_setg(errp, "The CPU type '%s' is not a recognized LoongArch CPU type",
model->name);
return NULL;
}
obj = object_new(object_class_get_name(oc));
expansion_info = g_new0(CpuModelExpansionInfo, 1);
expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
expansion_info->model->name = g_strdup(model->name);
qdict_out = qdict_new();
i = 0;
while ((name = cpu_model_advertised_features[i++]) != NULL) {
ObjectProperty *prop = object_property_find(obj, name);
if (prop) {
QObject *value;
assert(prop->get);
value = object_property_get_qobject(obj, name, &error_abort);
qdict_put_obj(qdict_out, name, value);
}
}
if (!qdict_size(qdict_out)) {
qobject_unref(qdict_out);
} else {
expansion_info->model->props = QOBJECT(qdict_out);
}
object_unref(obj);
return expansion_info;
}