cpu_x86: Introduce virCPUx86DataAddFeature

The API is useful for creating virCPUData in a hypervisor driver from
data we got by querying the hypervisor.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

src/cpu/cpu_x86.c

@@ -2756,6 +2756,28 @@ virCPUx86DataSetVendor(virCPUDataPtr cpuData,
 }
 
 
+int
+virCPUx86DataAddFeature(virCPUDataPtr cpuData,
+                        const char *name)
+{
+    virCPUx86FeaturePtr feature;
+    virCPUx86MapPtr map;
+
+    if (!(map = virCPUx86GetMap()))
+        return -1;
+
+    /* ignore unknown features */
+    if (!(feature = x86FeatureFind(map, name)) &&
+        !(feature = x86FeatureFindInternal(name)))
+        return 0;
+
+    if (x86DataAdd(&cpuData->data.x86, &feature->data) < 0)
+        return -1;
+
+    return 0;
+}
+
+
 struct cpuArchDriver cpuDriverX86 = {
     .name = "x86",
     .arch = archs,

src/cpu/cpu_x86.h

@@ -39,4 +39,7 @@ int virCPUx86DataSetSignature(virCPUDataPtr cpuData,
 int virCPUx86DataSetVendor(virCPUDataPtr cpuData,
                            const char *vendor);
 
+int virCPUx86DataAddFeature(virCPUDataPtr cpuData,
+                            const char *name);
+
 #endif /* __VIR_CPU_X86_H__ */

src/libvirt_private.syms

@@ -1003,6 +1003,7 @@ virCPUUpdate;
 
 # cpu/cpu_x86.h
 virCPUx86DataAddCPUID;
+virCPUx86DataAddFeature;
 virCPUx86DataSetSignature;
 virCPUx86DataSetVendor;