cpu_map: Disable cpu64-rhel* for host-model and baseline

These ancient RHEL-only CPU models should not really be used by any CPU
definition created by libvirt. We keep them just for backwards
compatibility with domains which might still be using them.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

src/cpu_map/x86_cpu64-rhel5.xml

@@ -1,6 +1,6 @@
 <cpus>
   <model name='cpu64-rhel5'>
-    <decode host='on' guest='on'/>
+    <decode host='off' guest='off'/>
     <feature name='apic'/>
     <feature name='clflush'/>
     <feature name='cmov'/>

src/cpu_map/x86_cpu64-rhel6.xml

@@ -1,6 +1,6 @@
 <cpus>
   <model name='cpu64-rhel6'>
-    <decode host='on' guest='on'/>
+    <decode host='off' guest='off'/>
     <feature name='apic'/>
     <feature name='clflush'/>
     <feature name='cmov'/>

tests/cputestdata/x86_64-baseline-no-vendor-result.xml

@@ -1,3 +1,4 @@
 <cpu mode='custom' match='exact'>
-  <model fallback='allow'>cpu64-rhel6</model>
+  <model fallback='allow'>kvm64</model>
+  <feature policy='require' name='lahf_lm'/>
 </cpu>