cpu_model string does represent features in following format:
([+-]feat)|(feat=foo)|(feat)
which makes it impossible directly use property infrastructure
to set features on CPU.
This patch introduces parser that splits CPU name from cpu_model and
converts legacy features string into canonized set of strings that
is compatible with property manipulation infrastructure.
PS:
* later it could be used as a hook to convert legacy command line
features to global properties. Then marked as deprecated and
removed with -cpu option in the future.
* compiler complains that it's unused function but I guess it is
easier for review this way
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
target-i386/cpu.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 0543e62..2c9cd6b 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1332,6 +1332,58 @@ static void cpudef_2_x86_cpu(X86CPU *cpu, x86_def_t
*def, Error **errp)
env->cpuid_xlevel2 = def->xlevel2;
}
+/* convert legacy cpumodel string to string cpu_name and
+ * a uniforms set of custom features that will be applied to CPU
+ * using object_property_parse()
+ */
+static void compat_normalize_cpu_model(const char *cpu_model, char **cpu_name,
+ QDict **features, Error **errp)
+{
+
+ char *s = g_strdup(cpu_model);
+ char *featurestr, *sptr;
+
+ *cpu_name = strtok_r(s, ",", &sptr);
+ *features = qdict_new();
+
+ featurestr = strtok_r(NULL, ",", &sptr);
+ while (featurestr) {
+ char *val;
+ if (featurestr[0] == '+') {
+ /*
+ * preseve legacy behaviour, if feature was disabled once
+ * do not allow to enable it again
+ */
+ if (!qdict_haskey(*features, featurestr + 1)) {
+ qdict_put(*features, featurestr + 1, qstring_from_str("on"));
+ }
+ } else if (featurestr[0] == '-') {
+ qdict_put(*features, featurestr + 1, qstring_from_str("off"));
+ } else {
+ val = strchr(featurestr, '=');
+ if (val) {
+ *val = 0; val++;
+ if (!strcmp(featurestr, "vendor")) {
+ qdict_put(*features, "vendor-override",
+ qstring_from_str("on"));
+ qdict_put(*features, featurestr, qstring_from_str(val));
+ } else if (!strcmp(featurestr, "tsc_freq")) {
+ qdict_put(*features, "tsc-frequency",
+ qstring_from_str(val));
+ } else {
+ qdict_put(*features, featurestr, qstring_from_str(val));
+ }
+ } else {
+ qdict_put(*features, featurestr, qstring_from_str("on"));
+ }
+ }
+
+ featurestr = strtok_r(NULL, ",", &sptr);
+ }
+
+ return;
+}
+
static int cpu_x86_find_by_name(X86CPU *cpu, x86_def_t *x86_cpu_def,
const char *cpu_model, Error **errp)
{
--
1.7.11.4
