[Qemu-devel] [PATCH 07/17] target-i386: prepare cpu_x86_parse_featurestr() to return a set of key, value property pairs

[Igor Mammedov <imammedo@redhat.com>]

It prepares for converting "+feature,-feature,feature=foo,feature" into
a set of key,value property pairs that will be applied to CPU by
x86_cpu_set_props().

It separates legacy format parsing from property setting, later it could be
transformed into code that sets global properties for a given CPU type.

Each feature handled by cpu_x86_parse_featurestr() will be converted into
foo,val pair and a corresponding property setter in following patches.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
  v2:
    - rebased with "target-i386: move out CPU features initialization
      in separate func" patch dropped
    - renamed cpu_x86_set_props() to x86_cpu_set_props()
    - rebased on top of "disable kvm_mmu + -cpu "enforce" fixes (v3)"
---
 target-i386/cpu.c |   34 ++++++++++++++++++++++++++++------
 1 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 4250c77..c55f137 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1301,9 +1301,26 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
     return 0;
 }
 
+/* Set features on X86CPU object based on a provided key,value list */
+static void x86_cpu_set_props(X86CPU *cpu, QDict *features, Error **errp)
+{
+    const QDictEntry *ent;
+
+    for (ent = qdict_first(features); ent; ent = qdict_next(features, ent)) {
+        const QString *qval = qobject_to_qstring(qdict_entry_value(ent));
+        /* TODO: switch to using global properties after subclasses are done */
+        object_property_parse(OBJECT(cpu), qstring_get_str(qval),
+                              qdict_entry_key(ent), errp);
+        if (error_is_set(errp)) {
+            return;
+        }
+    }
+}
+
 /* Parse "+feature,-feature,feature=foo" CPU feature string
  */
-static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
+static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features,
+                                    QDict **props)
 {
     char *featurestr; /* Single 'key=value" string being parsed */
     /* Features to be added */
@@ -1311,10 +1328,11 @@ static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
     /* Features to be removed */
     FeatureWordArray minus_features = { 0 };
     uint32_t numvalue;
+    gchar **feat_array = g_strsplit(features ? features : "", ",", 0);
+    *props = qdict_new();
+    int j = 0;
 
-    featurestr = features ? strtok(features, ",") : NULL;
-
-    while (featurestr) {
+    while ((featurestr = feat_array[j++])) {
         char *val;
         if (featurestr[0] == '+') {
             add_flagname_to_bitmaps(featurestr + 1, plus_features);
@@ -1405,7 +1423,6 @@ static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
             fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
             goto error;
         }
-        featurestr = strtok(NULL, ",");
     }
     x86_cpu_def->features |= plus_features[FEAT_1_EDX];
     x86_cpu_def->ext_features |= plus_features[FEAT_1_ECX];
@@ -1423,9 +1440,11 @@ static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
     x86_cpu_def->kvm_features &= ~minus_features[FEAT_KVM];
     x86_cpu_def->svm_features &= ~minus_features[FEAT_SVM];
     x86_cpu_def->cpuid_7_0_ebx_features &= ~minus_features[FEAT_7_0_EBX];
+    g_strfreev(feat_array);
     return 0;
 
 error:
+    g_strfreev(feat_array);
     return -1;
 }
 
@@ -1534,6 +1553,7 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
 {
     CPUX86State *env = &cpu->env;
     x86_def_t def1, *def = &def1;
+    QDict *props = NULL;
     Error *error = NULL;
     char *name, *features;
     gchar **model_pieces;
@@ -1556,7 +1576,7 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
     def->kvm_features |= kvm_default_features;
     def->ext_features |= CPUID_EXT_HYPERVISOR;
 
-    if (cpu_x86_parse_featurestr(def, features) < 0) {
+    if (cpu_x86_parse_featurestr(def, features, &props) < 0) {
         error_setg(&error, "Invalid cpu_model string format: %s", cpu_model);
         goto out;
     }
@@ -1580,8 +1600,10 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
                             "tsc-frequency", &error);
 
     object_property_set_str(OBJECT(cpu), def->model_id, "model-id", &error);
+    x86_cpu_set_props(cpu, props, &error);
 
 out:
+    QDECREF(props);
     g_strfreev(model_pieces);
     if (error) {
         fprintf(stderr, "%s\n", error_get_pretty(error));
-- 
1.7.1