6edd2a9bec
Implement PMU extension for LoongArch kvm mode. Use OnOffAuto type variable pmu to check the PMU feature. If the PMU Feature is not supported with KVM host, it reports error if there is pmu=on command line. If there is no any command line about pmu parameter, it checks whether KVM host supports the PMU Feature and set the corresponding value in cpucfg. This patch is based on lbt patch located at https://lore.kernel.org/qemu-devel/20240904061859.86615-1-maobibo@loongson.cn Co-developed-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Bibo Mao <maobibo@loongson.cn> Reviewed-by: Song Gao <gaosong@loongson.cn> Message-Id: <20240918082315.2345034-1-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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* QEMU LoongArch CPU (monitor definitions)
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*
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* SPDX-FileCopyrightText: 2021 Loongson Technology Corporation Limited
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-machine-target.h"
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#include "cpu.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi/qobject-input-visitor.h"
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#include "qom/qom-qobject.h"
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static void loongarch_cpu_add_definition(gpointer data, gpointer user_data)
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{
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ObjectClass *oc = data;
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CpuDefinitionInfoList **cpu_list = user_data;
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CpuDefinitionInfo *info = g_new0(CpuDefinitionInfo, 1);
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const char *typename = object_class_get_name(oc);
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info->name = cpu_model_from_type(typename);
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info->q_typename = g_strdup(typename);
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QAPI_LIST_PREPEND(*cpu_list, info);
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}
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CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
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{
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CpuDefinitionInfoList *cpu_list = NULL;
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GSList *list;
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list = object_class_get_list(TYPE_LOONGARCH_CPU, false);
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g_slist_foreach(list, loongarch_cpu_add_definition, &cpu_list);
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g_slist_free(list);
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return cpu_list;
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}
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static const char *cpu_model_advertised_features[] = {
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"lsx", "lasx", "lbt", "pmu", NULL
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};
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CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
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CpuModelInfo *model,
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Error **errp)
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{
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Visitor *visitor;
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bool ok;
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CpuModelExpansionInfo *expansion_info;
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QDict *qdict_out;
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ObjectClass *oc;
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Object *obj;
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const char *name;
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int i;
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if (type != CPU_MODEL_EXPANSION_TYPE_STATIC) {
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error_setg(errp, "The requested expansion type is not supported");
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return NULL;
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}
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if (model->props) {
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visitor = qobject_input_visitor_new(model->props);
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if (!visit_start_struct(visitor, "model.props", NULL, 0, errp)) {
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visit_free(visitor);
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return NULL;
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}
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ok = visit_check_struct(visitor, errp);
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visit_end_struct(visitor, NULL);
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visit_free(visitor);
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if (!ok) {
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return NULL;
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}
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}
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oc = cpu_class_by_name(TYPE_LOONGARCH_CPU, model->name);
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if (!oc) {
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error_setg(errp, "The CPU type '%s' is not a recognized LoongArch CPU type",
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model->name);
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return NULL;
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}
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obj = object_new(object_class_get_name(oc));
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expansion_info = g_new0(CpuModelExpansionInfo, 1);
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expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
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expansion_info->model->name = g_strdup(model->name);
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qdict_out = qdict_new();
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i = 0;
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while ((name = cpu_model_advertised_features[i++]) != NULL) {
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ObjectProperty *prop = object_property_find(obj, name);
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if (prop) {
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QObject *value;
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assert(prop->get);
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value = object_property_get_qobject(obj, name, &error_abort);
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qdict_put_obj(qdict_out, name, value);
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}
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}
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if (!qdict_size(qdict_out)) {
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qobject_unref(qdict_out);
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} else {
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expansion_info->model->props = QOBJECT(qdict_out);
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}
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object_unref(obj);
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return expansion_info;
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}
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