[PATCH v2 1/3] cpu-models: add "disable-deprecated-feats" option to cpu model expansion

[Collin Walling <walling@linux.ibm.com>]

This optional parameter for query-cpu-model-expansion enables CPU
model features flagged as deprecated to appear in the resulting
list of properties.

This commit does not add support beyond adding a new argument
to the query. All queries with this option present will result
in an error claiming this option is not supported.

Signed-off-by: Collin Walling <walling@linux.ibm.com>
---
 qapi/machine-target.json         | 7 ++++++-
 target/arm/arm-qmp-cmds.c        | 7 +++++++
 target/i386/cpu-sysemu.c         | 7 +++++++
 target/s390x/cpu_models_sysemu.c | 7 +++++++
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/qapi/machine-target.json b/qapi/machine-target.json
index 29e695aa06..b9da284d2d 100644
--- a/qapi/machine-target.json
+++ b/qapi/machine-target.json
@@ -285,6 +285,10 @@
 #
 # @type: expansion type, specifying how to expand the CPU model
 #
+# @disable-deprecated-feats: include CPU model features that are
+#     flagged as deprecated. If supported, these features will appear
+#     in the properties list paired with false.
+#
 # Returns: a CpuModelExpansionInfo describing the expanded CPU model
 #
 # Errors:
@@ -298,7 +302,8 @@
 ##
 { 'command': 'query-cpu-model-expansion',
   'data': { 'type': 'CpuModelExpansionType',
-            'model': 'CpuModelInfo' },
+            'model': 'CpuModelInfo',
+            '*disable-deprecated-feats': 'bool' },
   'returns': 'CpuModelExpansionInfo',
   'if': { 'any': [ 'TARGET_S390X',
                    'TARGET_I386',
diff --git a/target/arm/arm-qmp-cmds.c b/target/arm/arm-qmp-cmds.c
index 3cc8cc738b..1010d654e3 100644
--- a/target/arm/arm-qmp-cmds.c
+++ b/target/arm/arm-qmp-cmds.c
@@ -100,6 +100,8 @@ static const char *cpu_model_advertised_features[] = {
 
 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
                                                      CpuModelInfo *model,
+                                                     bool has_disable_deprecated_feats,
+                                                     bool disable_deprecated_feats,
                                                      Error **errp)
 {
     CpuModelExpansionInfo *expansion_info;
@@ -110,6 +112,11 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
     const char *name;
     int i;
 
+    if (has_disable_deprecated_feats) {
+        error_setg(&err, "Unsupported option 'disable-deprecated-feats'");
+        return NULL;
+    }
+
     if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
         error_setg(errp, "The requested expansion type is not supported");
         return NULL;
diff --git a/target/i386/cpu-sysemu.c b/target/i386/cpu-sysemu.c
index 3f9093d285..c15786fb66 100644
--- a/target/i386/cpu-sysemu.c
+++ b/target/i386/cpu-sysemu.c
@@ -196,6 +196,8 @@ out:
 CpuModelExpansionInfo *
 qmp_query_cpu_model_expansion(CpuModelExpansionType type,
                                                       CpuModelInfo *model,
+                                                      bool has_disable_deprecated_feats,
+                                                      bool disable_deprecated_feats,
                                                       Error **errp)
 {
     X86CPU *xc = NULL;
@@ -204,6 +206,11 @@ qmp_query_cpu_model_expansion(CpuModelExpansionType type,
     QDict *props = NULL;
     const char *base_name;
 
+    if (has_disable_deprecated_feats) {
+        error_setg(&err, "Unsupported option 'disable-deprecated-feats'");
+        goto out;
+    }
+
     xc = x86_cpu_from_model(model->name, model->props, "model.props", &err);
     if (err) {
         goto out;
diff --git a/target/s390x/cpu_models_sysemu.c b/target/s390x/cpu_models_sysemu.c
index 2d99218069..ef9fa80efd 100644
--- a/target/s390x/cpu_models_sysemu.c
+++ b/target/s390x/cpu_models_sysemu.c
@@ -210,6 +210,8 @@ static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
 
 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
                                                       CpuModelInfo *model,
+                                                      bool has_disable_deprecated_feats,
+                                                      bool disable_deprecated_feats,
                                                       Error **errp)
 {
     Error *err = NULL;
@@ -217,6 +219,11 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
     S390CPUModel s390_model;
     bool delta_changes = false;
 
+    if (has_disable_deprecated_feats) {
+        error_setg(&err, "Unsupported option 'disable-deprecated-feats'");
+        return NULL;
+    }
+
     /* convert it to our internal representation */
     cpu_model_from_info(&s390_model, model, "model", &err);
     if (err) {
-- 
2.43.0