cpu_map: Distinguish Cascadelake-Server from Skylake-Server

The signatures of these two CPU model differ only in stepping as both
report family 6 and model 85. Skylake-Server uses stepping 4 or less and
Cascadelake-Server uses stepping 5..7.

https://bugzilla.redhat.com/show_bug.cgi?id=1761678Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/cpu_map/x86_Cascadelake-Server-noTSX.xml

 <cpus>
   <model name='Cascadelake-Server-noTSX'>
     <decode host='on' guest='off'/>
-    <signature family='6' model='85'/> <!-- 050654 -->
+    <signature family='6' model='85' stepping='5-7'/> <!-- 050654 -->
     <vendor name='Intel'/>
     <feature name='3dnowprefetch'/>
     <feature name='abm'/>

src/cpu_map/x86_Cascadelake-Server.xml

 <cpus>
   <model name='Cascadelake-Server'>
     <decode host='on' guest='on'/>
-    <signature family='6' model='85'/> <!-- 050654 -->
+    <signature family='6' model='85' stepping='5-7'/> <!-- 050654 -->
     <vendor name='Intel'/>
     <feature name='3dnowprefetch'/>
     <feature name='abm'/>

src/cpu_map/x86_Skylake-Server-IBRS.xml

 <cpus>
   <model name='Skylake-Server-IBRS'>
     <decode host='on' guest='on'/>
-    <signature family='6' model='85'/> <!-- 050654 -->
+    <signature family='6' model='85' stepping='0-4'/> <!-- 050654 -->
     <vendor name='Intel'/>
     <feature name='3dnowprefetch'/>
     <feature name='abm'/>

src/cpu_map/x86_Skylake-Server-noTSX-IBRS.xml

 <cpus>
   <model name='Skylake-Server-noTSX-IBRS'>
     <decode host='on' guest='off'/>
-    <signature family='6' model='85'/> <!-- 050654 -->
+    <signature family='6' model='85' stepping='0-4'/> <!-- 050654 -->
     <vendor name='Intel'/>
     <feature name='3dnowprefetch'/>
     <feature name='abm'/>

src/cpu_map/x86_Skylake-Server.xml

 <cpus>
   <model name='Skylake-Server'>
     <decode host='on' guest='on'/>
-    <signature family='6' model='85'/> <!-- 050654 -->
+    <signature family='6' model='85' stepping='0-4'/> <!-- 050654 -->
     <vendor name='Intel'/>
     <feature name='3dnowprefetch'/>
     <feature name='abm'/>

tests/cputestdata/x86_64-cpuid-Xeon-Gold-6130-guest.xml

 <cpu mode='custom' match='exact'>
-  <model fallback='forbid'>Cascadelake-Server</model>
+  <model fallback='forbid'>Skylake-Server-IBRS</model>
   <vendor>Intel</vendor>
   <feature policy='require' name='ds'/>
   <feature policy='require' name='acpi'/>
@@ -20,14 +20,15 @@
   <feature policy='require' name='osxsave'/>
   <feature policy='require' name='tsc_adjust'/>
   <feature policy='require' name='cmt'/>
+  <feature policy='require' name='clflushopt'/>
   <feature policy='require' name='intel-pt'/>
   <feature policy='require' name='pku'/>
   <feature policy='require' name='ospke'/>
   <feature policy='require' name='md-clear'/>
   <feature policy='require' name='stibp'/>
+  <feature policy='require' name='ssbd'/>
   <feature policy='require' name='xsaves'/>
   <feature policy='require' name='mbm_total'/>
   <feature policy='require' name='mbm_local'/>
   <feature policy='require' name='invtsc'/>
-  <feature policy='disable' name='avx512vnni'/>
 </cpu>

tests/cputestdata/x86_64-cpuid-Xeon-Gold-6130-json.xml

 <cpu mode='custom' match='exact'>
-  <model fallback='forbid'>Cascadelake-Server</model>
+  <model fallback='forbid'>Skylake-Server-IBRS</model>
   <vendor>Intel</vendor>
   <feature policy='require' name='ss'/>
   <feature policy='require' name='vmx'/>
   <feature policy='require' name='hypervisor'/>
   <feature policy='require' name='tsc_adjust'/>
+  <feature policy='require' name='clflushopt'/>
   <feature policy='require' name='umip'/>
   <feature policy='require' name='pku'/>
   <feature policy='require' name='md-clear'/>
   <feature policy='require' name='stibp'/>
   <feature policy='require' name='arch-capabilities'/>
+  <feature policy='require' name='ssbd'/>
   <feature policy='require' name='xsaves'/>
   <feature policy='require' name='skip-l1dfl-vmentry'/>
-  <feature policy='disable' name='avx512vnni'/>
 </cpu>