conf: cpu: Add <signature family=X model=X stepping=X/>

Internally we already collect x86 host family + model + stepping
numeric values. This exposed them in capabilities CPU output.
Example:

$ sudo virsh capabilities | grep -A1 -B1 signature
      <microcode version='240'/>
      <signature family='6' model='94' stepping='3'/>
      <counter name='tsc' frequency='3408010000' scaling='no'/>

Users need to know these values to calculate an expected.
SEV-ES/SEV-SNP launch measurement.

Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>

src/conf/cpu_conf.c

@@ -243,6 +243,9 @@ virCPUDefCopyWithoutModel(const virCPUDef *cpu)
     copy->threads = cpu->threads;
     copy->arch = cpu->arch;
     copy->migratable = cpu->migratable;
+    copy->sigFamily = cpu->sigFamily;
+    copy->sigModel = cpu->sigModel;
+    copy->sigStepping = cpu->sigStepping;
 
     if (cpu->cache) {
         copy->cache = g_new0(virCPUCacheDef, 1);
@@ -419,6 +422,7 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
     if (def->type == VIR_CPU_TYPE_HOST) {
         g_autofree char *arch = virXPathString("string(./arch[1])", ctxt);
         xmlNodePtr counter_node = NULL;
+        xmlNodePtr signature_node = NULL;
 
         if (!arch) {
             virReportError(VIR_ERR_XML_ERROR, "%s",
@@ -439,6 +443,26 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
             return -1;
         }
 
+        if ((signature_node = virXPathNode("./signature[1]", ctxt))) {
+            if (virXMLPropUInt(signature_node, "family", 10,
+                               VIR_XML_PROP_REQUIRED | VIR_XML_PROP_NONZERO,
+                               &def->sigFamily) < 0) {
+                return -1;
+            }
+
+            if (virXMLPropUInt(signature_node, "model", 10,
+                               VIR_XML_PROP_REQUIRED,
+                               &def->sigModel) < 0) {
+                return -1;
+            }
+
+            if (virXMLPropUInt(signature_node, "stepping", 10,
+                               VIR_XML_PROP_REQUIRED,
+                               &def->sigStepping) < 0) {
+                return -1;
+            }
+        }
+
         if ((counter_node = virXPathNode("./counter[@name='tsc']", ctxt))) {
             tsc = g_new0(virHostCPUTscInfo, 1);
 
@@ -751,6 +775,14 @@ virCPUDefFormatBuf(virBuffer *buf,
         virBufferAsprintf(buf, "<microcode version='%u'/>\n",
                           def->microcodeVersion);
 
+    if (def->type == VIR_CPU_TYPE_HOST && def->sigFamily) {
+        virBufferAddLit(buf, "<signature");
+        virBufferAsprintf(buf, " family='%u'", def->sigFamily);
+        virBufferAsprintf(buf, " model='%u'", def->sigModel);
+        virBufferAsprintf(buf, " stepping='%u'", def->sigStepping);
+        virBufferAddLit(buf, "/>\n");
+    }
+
     if (def->type == VIR_CPU_TYPE_HOST && def->tsc) {
         virBufferAddLit(buf, "<counter name='tsc'");
         virBufferAsprintf(buf, " frequency='%llu'", def->tsc->frequency);

src/conf/cpu_conf.h

@@ -133,6 +133,9 @@ struct _virCPUDef {
     unsigned int dies;
     unsigned int cores;
     unsigned int threads;
+    unsigned int sigFamily;
+    unsigned int sigModel;
+    unsigned int sigStepping;
     size_t nfeatures;
     size_t nfeatures_max;
     virCPUFeatureDef *features;

src/conf/schemas/cputypes.rng

@@ -342,6 +342,19 @@
             </attribute>
           </element>
         </optional>
+        <optional>
+          <element name="signature">
+            <attribute name="family">
+              <ref name="positiveInteger"/>
+            </attribute>
+            <attribute name="model">
+              <ref name="unsignedInt"/>
+            </attribute>
+            <attribute name="stepping">
+              <ref name="unsignedInt"/>
+            </attribute>
+          </element>
+        </optional>
         <optional>
           <element name="counter">
             <attribute name="name">

src/cpu/cpu_x86.c

@@ -2264,6 +2264,9 @@ x86Decode(virCPUDef *cpu,
     cpuModel->nfeatures = 0;
     cpu->nfeatures_max = cpuModel->nfeatures_max;
     cpuModel->nfeatures_max = 0;
+    cpu->sigFamily = sigFamily;
+    cpu->sigModel = sigModel;
+    cpu->sigStepping = sigStepping;
 
     return 0;
 }

tests/cputestdata/x86_64-cpuid-A10-5800K-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Opteron_G5</model>
   <vendor>AMD</vendor>
+  <signature family='21' model='16' stepping='1'/>
   <feature name='vme'/>
   <feature name='ht'/>
   <feature name='monitor'/>

tests/cputestdata/x86_64-cpuid-Atom-D510-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>n270</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='28' stepping='10'/>
   <feature name='pse36'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Atom-N450-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>n270</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='28' stepping='10'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Atom-P5362-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Westmere-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='134' stepping='5'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Cooperlake-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Cooperlake</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='85' stepping='11'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i5-2500-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>SandyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='42' stepping='7'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i5-2540M-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>SandyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='42' stepping='7'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i5-4670T-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Haswell-noTSX</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='60' stepping='3'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i5-650-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Westmere</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='37' stepping='2'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i5-6600-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='94' stepping='3'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-2600-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>SandyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='42' stepping='7'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-2600-xsaveopt-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>SandyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='42' stepping='7'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-3520M-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>IvyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='58' stepping='9'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-3740QM-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>IvyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='58' stepping='9'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-3770-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>IvyBridge</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='58' stepping='9'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-4510U-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Westmere</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='69' stepping='1'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-4600U-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Haswell-noTSX</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='69' stepping='1'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Broadwell</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='61' stepping='4'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-5600U-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Broadwell</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='61' stepping='4'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-5600U-ibrs-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Broadwell-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='61' stepping='4'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core-i7-7600U-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='142' stepping='9'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-7700-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='158' stepping='9'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-8550U-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client-noTSX-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='142' stepping='10'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core-i7-8700-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='158' stepping='10'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Core2-E6850-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Conroe</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='15' stepping='11'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Core2-Q9500-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Penryn</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='23' stepping='10'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-EPYC-7502-32-Core-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>EPYC-Rome</model>
   <vendor>AMD</vendor>
+  <signature family='23' model='49' stepping='0'/>
   <feature name='ht'/>
   <feature name='monitor'/>
   <feature name='osxsave'/>

tests/cputestdata/x86_64-cpuid-EPYC-7601-32-Core-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>EPYC</model>
   <vendor>AMD</vendor>
+  <signature family='23' model='1' stepping='2'/>
   <feature name='ht'/>
   <feature name='monitor'/>
   <feature name='osxsave'/>

tests/cputestdata/x86_64-cpuid-EPYC-7601-32-Core-ibpb-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>EPYC-IBPB</model>
   <vendor>AMD</vendor>
+  <signature family='23' model='1' stepping='2'/>
   <feature name='ht'/>
   <feature name='monitor'/>
   <feature name='osxsave'/>

tests/cputestdata/x86_64-cpuid-FX-8150-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Opteron_G4</model>
   <vendor>AMD</vendor>
+  <signature family='21' model='1' stepping='2'/>
   <feature name='vme'/>
   <feature name='ht'/>
   <feature name='monitor'/>

tests/cputestdata/x86_64-cpuid-Hygon-C86-7185-32-core-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Dhyana</model>
   <vendor>Hygon</vendor>
+  <signature family='24' model='0' stepping='1'/>
   <feature name='ht'/>
   <feature name='monitor'/>
   <feature name='osxsave'/>

tests/cputestdata/x86_64-cpuid-Ice-Lake-Server-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Icelake-Server</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='106' stepping='0'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Opteron-1352-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Opteron_G3</model>
   <vendor>AMD</vendor>
+  <signature family='16' model='2' stepping='3'/>
   <feature name='vme'/>
   <feature name='ht'/>
   <feature name='monitor'/>

tests/cputestdata/x86_64-cpuid-Opteron-2350-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Opteron_G3</model>
   <vendor>AMD</vendor>
+  <signature family='16' model='2' stepping='3'/>
   <feature name='vme'/>
   <feature name='ht'/>
   <feature name='monitor'/>

tests/cputestdata/x86_64-cpuid-Opteron-6234-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Opteron_G4</model>
   <vendor>AMD</vendor>
+  <signature family='21' model='1' stepping='2'/>
   <feature name='vme'/>
   <feature name='ht'/>
   <feature name='monitor'/>

tests/cputestdata/x86_64-cpuid-Opteron-6282-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Opteron_G4</model>
   <vendor>AMD</vendor>
+  <signature family='21' model='1' stepping='2'/>
   <feature name='vme'/>
   <feature name='ht'/>
   <feature name='monitor'/>

tests/cputestdata/x86_64-cpuid-Pentium-P6100-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>core2duo</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='37' stepping='5'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Phenom-B95-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>athlon</model>
   <vendor>AMD</vendor>
+  <signature family='16' model='4' stepping='2'/>
   <feature name='mca'/>
   <feature name='clflush'/>
   <feature name='ht'/>

tests/cputestdata/x86_64-cpuid-Ryzen-7-1800X-Eight-Core-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>EPYC</model>
   <vendor>AMD</vendor>
+  <signature family='23' model='1' stepping='1'/>
   <feature name='ht'/>
   <feature name='monitor'/>
   <feature name='osxsave'/>

tests/cputestdata/x86_64-cpuid-Ryzen-9-3900X-12-Core-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>EPYC-Rome</model>
   <vendor>AMD</vendor>
+  <signature family='23' model='113' stepping='0'/>
   <feature name='ht'/>
   <feature name='monitor'/>
   <feature name='osxsave'/>

tests/cputestdata/x86_64-cpuid-Xeon-5110-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Conroe</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='15' stepping='6'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='94' stepping='3'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Xeon-E3-1245-v5-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Client</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='94' stepping='3'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2609-v3-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Haswell-noTSX-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='63' stepping='2'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2623-v4-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Broadwell-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='79' stepping='1'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2630-v3-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Haswell-noTSX</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='63' stepping='2'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2630-v4-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Broadwell</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='79' stepping='1'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2650-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>SandyBridge-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='45' stepping='7'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2650-v3-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Haswell-noTSX</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='63' stepping='2'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E5-2650-v4-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Broadwell</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='79' stepping='1'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E7-4820-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Westmere</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='47' stepping='2'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E7-4830-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Westmere</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='47' stepping='2'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E7-8890-v3-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Haswell</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='63' stepping='4'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-E7540-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Nehalem-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='46' stepping='6'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-Gold-5115-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Server-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='85' stepping='4'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

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

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Server-IBRS</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='85' stepping='4'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Xeon-Gold-6148-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Skylake-Server</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='85' stepping='4'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Cascadelake-Server</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='85' stepping='6'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Xeon-Platinum-9242-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Cascadelake-Server</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='85' stepping='7'/>
   <feature name='ds'/>
   <feature name='acpi'/>
   <feature name='ss'/>

tests/cputestdata/x86_64-cpuid-Xeon-W3520-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Nehalem</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='26' stepping='5'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>

tests/cputestdata/x86_64-cpuid-Xeon-X5460-host.xml

@@ -2,6 +2,7 @@
   <arch>x86_64</arch>
   <model>Penryn</model>
   <vendor>Intel</vendor>
+  <signature family='6' model='23' stepping='6'/>
   <feature name='vme'/>
   <feature name='ds'/>
   <feature name='acpi'/>