@@ -527,6 +527,61 @@ CpuModelCompareInfo *arch_query_cpu_model_comparison(CpuModelInfo *infoa,
}
return compare_info;
}
+
+CpuModelBaselineInfo *arch_query_cpu_model_baseline(CpuModelInfo *infoa,
+ CpuModelInfo *infob,
+ Error **errp)
+{
+ CpuModelBaselineInfo *baseline_info;
+ S390CPUModel modela, modelb, model;
+ uint16_t cpu_type;
+ uint8_t max_gen_ga;
+ uint8_t max_gen;
+
+ /* convert both models to our internal representation */
+ cpu_model_from_info(&modela, infoa, errp);
+ if (*errp) {
+ return NULL;
+ }
+
+ cpu_model_from_info(&modelb, infob, errp);
+ if (*errp) {
+ return NULL;
+ }
+
+ /* features both models support */
+ bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX);
+
+ /* detect the maximum model not regarding features */
+ if (modela.def->gen == modelb.def->gen) {
+ if (modela.def->type == modelb.def->type) {
+ cpu_type = modela.def->type;
+ } else {
+ cpu_type = 0;
+ }
+ max_gen = modela.def->gen;
+ max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga);
+ } else if (modela.def->gen > modelb.def->gen) {
+ cpu_type = modelb.def->type;
+ max_gen = modelb.def->gen;
+ max_gen_ga = modelb.def->ec_ga;
+ } else {
+ cpu_type = modela.def->type;
+ max_gen = modela.def->gen;
+ max_gen_ga = modela.def->ec_ga;
+ }
+
+ model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga,
+ model.features);
+ /* strip off features not part of the max model */
+ bitmap_and(model.features, model.features, model.def->full_feat,
+ S390_FEAT_MAX);
+
+ baseline_info = g_malloc0(sizeof(*baseline_info));
+ baseline_info->model = g_malloc0(sizeof(*baseline_info->model));
+ cpu_info_from_model(baseline_info->model, &model, true);
+ return baseline_info;
+}
#endif
static void check_consistency(const S390CPUModel *model)