From b527589d1fb15586fc92a299261180489bdc6220 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 12 Dec 2017 16:23:41 +0100
Subject: [PATCH] qemu: capabilities: force update if the microcode version
 does not match

A microcode update can cause the CPUID bits to change; an example
from the past was the update that disabled TSX on several Haswell
and Broadwell machines.

Therefore, place microcode version in the virQEMUCaps struct and
XML, and rebuild the cache if the versions do not match.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/qemu/qemu_capabilities.c                  | 40 ++++++++++++++++++-
 src/qemu/qemu_capabilities.h                  |  6 ++-
 src/qemu/qemu_capspriv.h                      |  5 +++
 src/qemu/qemu_driver.c                        |  9 ++++-
 .../caps_1.2.2.x86_64.xml                     |  1 +
 .../caps_1.3.1.x86_64.xml                     |  1 +
 .../caps_1.4.2.x86_64.xml                     |  1 +
 .../caps_1.5.3.x86_64.xml                     |  1 +
 .../caps_1.6.0.x86_64.xml                     |  1 +
 .../caps_1.7.0.x86_64.xml                     |  1 +
 .../caps_2.1.1.x86_64.xml                     |  1 +
 .../caps_2.10.0-gicv2.aarch64.xml             |  1 +
 .../caps_2.10.0-gicv3.aarch64.xml             |  1 +
 .../caps_2.10.0.ppc64.xml                     |  1 +
 .../caps_2.10.0.s390x.xml                     |  1 +
 .../caps_2.10.0.x86_64.xml                    |  1 +
 .../caps_2.4.0.x86_64.xml                     |  1 +
 .../caps_2.5.0.x86_64.xml                     |  1 +
 .../caps_2.6.0-gicv2.aarch64.xml              |  1 +
 .../caps_2.6.0-gicv3.aarch64.xml              |  1 +
 .../qemucapabilitiesdata/caps_2.6.0.ppc64.xml |  1 +
 .../caps_2.6.0.x86_64.xml                     |  1 +
 .../qemucapabilitiesdata/caps_2.7.0.s390x.xml |  1 +
 .../caps_2.7.0.x86_64.xml                     |  1 +
 .../qemucapabilitiesdata/caps_2.8.0.s390x.xml |  1 +
 .../caps_2.8.0.x86_64.xml                     |  1 +
 .../qemucapabilitiesdata/caps_2.9.0.ppc64.xml |  1 +
 .../qemucapabilitiesdata/caps_2.9.0.s390x.xml |  1 +
 .../caps_2.9.0.x86_64.xml                     |  1 +
 tests/qemucapabilitiestest.c                  | 14 +++++--
 tests/qemucapsprobe.c                         |  2 +-
 tests/testutilsqemu.c                         |  2 +-
 32 files changed, 93 insertions(+), 10 deletions(-)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 9673ef857b..abf02a9b17 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -507,6 +507,7 @@ struct _virQEMUCaps {
     unsigned int version;
     unsigned int kvmVersion;
     unsigned int libvirtVersion;
+    unsigned int microcodeVersion;
     char *package;
 
     virArch arch;
@@ -2296,6 +2297,7 @@ virQEMUCapsPtr virQEMUCapsNewCopy(virQEMUCapsPtr qemuCaps)
 
     ret->version = qemuCaps->version;
     ret->kvmVersion = qemuCaps->kvmVersion;
+    ret->microcodeVersion = qemuCaps->microcodeVersion;
 
     if (VIR_STRDUP(ret->package, qemuCaps->package) < 0)
         goto error;
@@ -3830,6 +3832,7 @@ struct _virQEMUCapsCachePriv {
     uid_t runUid;
     gid_t runGid;
     virArch hostArch;
+    unsigned int microcodeVersion;
 };
 typedef struct _virQEMUCapsCachePriv virQEMUCapsCachePriv;
 typedef virQEMUCapsCachePriv *virQEMUCapsCachePrivPtr;
@@ -3952,6 +3955,13 @@ virQEMUCapsLoadCache(virArch hostArch,
         goto cleanup;
     }
 
+    if (virXPathUInt("string(./microcodeVersion)", ctxt,
+                     &qemuCaps->microcodeVersion) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("missing microcode version in QEMU capabilities cache"));
+        goto cleanup;
+    }
+
     if (virXPathBoolean("boolean(./package)", ctxt) > 0) {
         qemuCaps->package = virXPathString("string(./package)", ctxt);
         if (!qemuCaps->package &&
@@ -4230,6 +4240,9 @@ virQEMUCapsFormatCache(virQEMUCapsPtr qemuCaps)
     virBufferAsprintf(&buf, "<kvmVersion>%d</kvmVersion>\n",
                       qemuCaps->kvmVersion);
 
+    virBufferAsprintf(&buf, "<microcodeVersion>%u</microcodeVersion>\n",
+                      qemuCaps->microcodeVersion);
+
     if (qemuCaps->package)
         virBufferAsprintf(&buf, "<package>%s</package>\n",
                           qemuCaps->package);
@@ -4371,6 +4384,16 @@ virQEMUCapsIsValid(void *data,
         return false;
     }
 
+    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM) &&
+        priv->microcodeVersion != qemuCaps->microcodeVersion) {
+        VIR_DEBUG("Outdated capabilities for '%s': microcode version changed "
+                  "(%u vs %u)",
+                  qemuCaps->binary,
+                  priv->microcodeVersion,
+                  qemuCaps->microcodeVersion);
+        return false;
+    }
+
     return true;
 }
 
@@ -5197,6 +5220,7 @@ virQEMUCapsNewForBinaryInternal(virArch hostArch,
                                 const char *libDir,
                                 uid_t runUid,
                                 gid_t runGid,
+                                unsigned int microcodeVersion,
                                 bool qmpOnly)
 {
     virQEMUCapsPtr qemuCaps;
@@ -5253,6 +5277,9 @@ virQEMUCapsNewForBinaryInternal(virArch hostArch,
     virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_KVM);
     virQEMUCapsInitHostCPUModel(qemuCaps, hostArch, VIR_DOMAIN_VIRT_QEMU);
 
+    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM))
+        qemuCaps->microcodeVersion = microcodeVersion;
+
  cleanup:
     VIR_FREE(qmperr);
     return qemuCaps;
@@ -5274,6 +5301,7 @@ virQEMUCapsNewData(const char *binary,
                                            priv->libDir,
                                            priv->runUid,
                                            priv->runGid,
+                                           priv->microcodeVersion,
                                            false);
 }
 
@@ -5356,7 +5384,8 @@ virFileCachePtr
 virQEMUCapsCacheNew(const char *libDir,
                     const char *cacheDir,
                     uid_t runUid,
-                    gid_t runGid)
+                    gid_t runGid,
+                    unsigned int microcodeVersion)
 {
     char *capsCacheDir = NULL;
     virFileCachePtr cache = NULL;
@@ -5379,6 +5408,7 @@ virQEMUCapsCacheNew(const char *libDir,
 
     priv->runUid = runUid;
     priv->runGid = runGid;
+    priv->microcodeVersion = microcodeVersion;
 
  cleanup:
     VIR_FREE(capsCacheDir);
@@ -5856,3 +5886,11 @@ virQEMUCapsFillDomainCaps(virCapsPtr caps,
         return -1;
     return 0;
 }
+
+
+void
+virQEMUCapsSetMicrocodeVersion(virQEMUCapsPtr qemuCaps,
+                               unsigned int microcodeVersion)
+{
+    qemuCaps->microcodeVersion = microcodeVersion;
+}
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index e73dbaa557..8bb0b6a232 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -520,8 +520,10 @@ void virQEMUCapsFilterByMachineType(virQEMUCapsPtr qemuCaps,
                                     const char *machineType);
 
 virFileCachePtr virQEMUCapsCacheNew(const char *libDir,
-                                        const char *cacheDir,
-                                        uid_t uid, gid_t gid);
+                                    const char *cacheDir,
+                                    uid_t uid,
+                                    gid_t gid,
+                                    unsigned int microcodeVersion);
 virQEMUCapsPtr virQEMUCapsCacheLookup(virFileCachePtr cache,
                                       const char *binary);
 virQEMUCapsPtr virQEMUCapsCacheLookupCopy(virFileCachePtr cache,
diff --git a/src/qemu/qemu_capspriv.h b/src/qemu/qemu_capspriv.h
index 219daa3629..98d163b920 100644
--- a/src/qemu/qemu_capspriv.h
+++ b/src/qemu/qemu_capspriv.h
@@ -36,6 +36,7 @@ virQEMUCapsNewForBinaryInternal(virArch hostArch,
                                 const char *libDir,
                                 uid_t runUid,
                                 gid_t runGid,
+                                unsigned int microcodeVersion,
                                 bool qmpOnly);
 
 int virQEMUCapsLoadCache(virArch hostArch,
@@ -102,4 +103,8 @@ int
 virQEMUCapsProbeQMPCPUDefinitions(virQEMUCapsPtr qemuCaps,
                                   qemuMonitorPtr mon,
                                   bool tcg);
+
+void
+virQEMUCapsSetMicrocodeVersion(virQEMUCapsPtr qemuCaps,
+                               unsigned int microcodeVersion);
 #endif
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 97b194b057..1ebc1177f8 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -633,6 +633,8 @@ qemuStateInitialize(bool privileged,
     char *hugepagePath = NULL;
     char *memoryBackingPath = NULL;
     size_t i;
+    virCPUDefPtr hostCPU = NULL;
+    unsigned int microcodeVersion = 0;
 
     if (VIR_ALLOC(qemu_driver) < 0)
         return -1;
@@ -855,10 +857,15 @@ qemuStateInitialize(bool privileged,
         run_gid = cfg->group;
     }
 
+    if ((hostCPU = virCPUProbeHost(virArchFromHost())))
+        microcodeVersion = hostCPU->microcodeVersion;
+    virCPUDefFree(hostCPU);
+
     qemu_driver->qemuCapsCache = virQEMUCapsCacheNew(cfg->libDir,
                                                      cfg->cacheDir,
                                                      run_uid,
-                                                     run_gid);
+                                                     run_gid,
+                                                     microcodeVersion);
     if (!qemu_driver->qemuCapsCache)
         goto error;
 
diff --git a/tests/qemucapabilitiesdata/caps_1.2.2.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.2.2.x86_64.xml
index d560811ab7..3001d487c6 100644
--- a/tests/qemucapabilitiesdata/caps_1.2.2.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.2.2.x86_64.xml
@@ -112,6 +112,7 @@
   <flag name='isa-serial'/>
   <version>1002002</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>26900</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='qemu64'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.3.1.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.3.1.x86_64.xml
index 576475f7fa..283f30ef07 100644
--- a/tests/qemucapabilitiesdata/caps_1.3.1.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.3.1.x86_64.xml
@@ -130,6 +130,7 @@
   <flag name='isa-serial'/>
   <version>1003001</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>30198</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='qemu64'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.4.2.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.4.2.x86_64.xml
index 0c271d3e41..200069ae86 100644
--- a/tests/qemucapabilitiesdata/caps_1.4.2.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.4.2.x86_64.xml
@@ -131,6 +131,7 @@
   <flag name='isa-serial'/>
   <version>1004002</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>30915</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
index 5c667975bf..e02c0961cd 100644
--- a/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
@@ -143,6 +143,7 @@
   <flag name='isa-serial'/>
   <version>1005003</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>47019</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
index 8ae07a91db..e3896685e9 100644
--- a/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
@@ -148,6 +148,7 @@
   <flag name='isa-serial'/>
   <version>1006000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>45248</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
index 34bd6be1cd..5b4d1ea661 100644
--- a/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
@@ -150,6 +150,7 @@
   <flag name='isa-serial'/>
   <version>1007000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>50692</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
index 0d7c144ff7..200e57adac 100644
--- a/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
@@ -166,6 +166,7 @@
   <flag name='isa-serial'/>
   <version>2001001</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>59488</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml
index eeb1840d3f..51d19aacb1 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml
@@ -187,6 +187,7 @@
   <flag name='pl011'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>304138</microcodeVersion>
   <package> (v2.10.0)</package>
   <arch>aarch64</arch>
   <cpu type='kvm' name='pxa262'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml
index 1e7b95ec02..b8309f35b3 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml
@@ -187,6 +187,7 @@
   <flag name='pl011'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>304138</microcodeVersion>
   <package> (v2.10.0)</package>
   <arch>aarch64</arch>
   <cpu type='kvm' name='pxa262'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
index ca55e11ebe..c866ce3ee8 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
@@ -185,6 +185,7 @@
   <flag name='isa-serial'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>383421</microcodeVersion>
   <package> (v2.10.0)</package>
   <arch>ppc64</arch>
   <cpu type='kvm' name='default'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
index 64e70f54be..e9115d304e 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
@@ -147,6 +147,7 @@
   <flag name='iscsi.password-secret'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>304153</microcodeVersion>
   <package></package>
   <arch>s390x</arch>
   <hostCPU type='kvm' model='z14-base' migratability='no'>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
index 8fea70a522..1687417081 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
@@ -230,6 +230,7 @@
   <flag name='isa-serial'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>345185</microcodeVersion>
   <package> (v2.10.0)</package>
   <arch>x86_64</arch>
   <hostCPU type='kvm' model='base' migratability='yes'>
diff --git a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
index 5007523c1f..9b315aecf4 100644
--- a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
@@ -191,6 +191,7 @@
   <flag name='isa-serial'/>
   <version>2004000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>75653</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
index a9ad292d01..3096eadf72 100644
--- a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
@@ -197,6 +197,7 @@
   <flag name='isa-serial'/>
   <version>2005000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>216775</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0-gicv2.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.6.0-gicv2.aarch64.xml
index d3e2e18faa..4cdd894a97 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0-gicv2.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0-gicv2.aarch64.xml
@@ -176,6 +176,7 @@
   <flag name='pl011'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>228838</microcodeVersion>
   <package></package>
   <arch>aarch64</arch>
   <cpu type='kvm' name='pxa262'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0-gicv3.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.6.0-gicv3.aarch64.xml
index bc86d03537..5655af7d3d 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0-gicv3.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0-gicv3.aarch64.xml
@@ -176,6 +176,7 @@
   <flag name='pl011'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>228838</microcodeVersion>
   <package></package>
   <arch>aarch64</arch>
   <cpu type='kvm' name='pxa262'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
index 27d99bd937..31701bb40b 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
@@ -171,6 +171,7 @@
   <flag name='isa-serial'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>263602</microcodeVersion>
   <package></package>
   <arch>ppc64</arch>
   <cpu type='kvm' name='default'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
index 97621612ab..6ae19ffd36 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
@@ -207,6 +207,7 @@
   <flag name='isa-serial'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>227579</microcodeVersion>
   <package></package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
index c2f310cd46..b6ec680d5c 100644
--- a/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
@@ -138,6 +138,7 @@
   <flag name='sclplmconsole'/>
   <version>2007000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>217559</microcodeVersion>
   <package></package>
   <arch>s390x</arch>
   <cpu type='kvm' name='host'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
index e4ea9452c5..294ac126e5 100644
--- a/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
@@ -211,6 +211,7 @@
   <flag name='isa-serial'/>
   <version>2007000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>239276</microcodeVersion>
   <package> (v2.7.0)</package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='Opteron_G5'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
index f6e024dc61..d788ad206e 100644
--- a/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
@@ -140,6 +140,7 @@
   <flag name='sclplmconsole'/>
   <version>2007093</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>242460</microcodeVersion>
   <package></package>
   <arch>s390x</arch>
   <hostCPU type='kvm' model='zEC12.2-base' migratability='no'>
diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
index c6d3e21d5c..156563d99a 100644
--- a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
@@ -213,6 +213,7 @@
   <flag name='isa-serial'/>
   <version>2008000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>255931</microcodeVersion>
   <package> (v2.8.0)</package>
   <arch>x86_64</arch>
   <cpu type='kvm' name='host' usable='yes'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
index 96aa5d59fc..cca643a3a5 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
@@ -179,6 +179,7 @@
   <flag name='isa-serial'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>347135</microcodeVersion>
   <package> (v2.9.0)</package>
   <arch>ppc64</arch>
   <cpu type='kvm' name='default'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
index baac0b7aeb..5d0f0aa6c6 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
@@ -143,6 +143,7 @@
   <flag name='iscsi.password-secret'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>265878</microcodeVersion>
   <package></package>
   <arch>s390x</arch>
   <hostCPU type='kvm' model='z13.2-base' migratability='no'>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
index 9f489129fb..907f543ee3 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
@@ -226,6 +226,7 @@
   <flag name='isa-serial'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
+  <microcodeVersion>321194</microcodeVersion>
   <package> (v2.9.0)</package>
   <arch>x86_64</arch>
   <hostCPU type='kvm' model='base' migratability='yes'>
diff --git a/tests/qemucapabilitiestest.c b/tests/qemucapabilitiestest.c
index dde5f767b8..87807b4135 100644
--- a/tests/qemucapabilitiestest.c
+++ b/tests/qemucapabilitiestest.c
@@ -61,10 +61,16 @@ testQemuCaps(const void *opaque)
                                   qemuMonitorTestGetMonitor(mon)) < 0)
         goto cleanup;
 
-    if (virQEMUCapsGet(capsActual, QEMU_CAPS_KVM) &&
-        virQEMUCapsInitQMPMonitorTCG(capsActual,
-                                     qemuMonitorTestGetMonitor(mon)) < 0)
-        goto cleanup;
+    if (virQEMUCapsGet(capsActual, QEMU_CAPS_KVM)) {
+        if (virQEMUCapsInitQMPMonitorTCG(capsActual,
+                                         qemuMonitorTestGetMonitor(mon)) < 0)
+            goto cleanup;
+
+        /* Fill microcodeVersion with a "random" value which is the file
+         * length to provide a reproducible number for testing.
+         */
+        virQEMUCapsSetMicrocodeVersion(capsActual, virFileLength(repliesFile, -1));
+    }
 
     if (!(actual = virQEMUCapsFormatCache(capsActual)))
         goto cleanup;
diff --git a/tests/qemucapsprobe.c b/tests/qemucapsprobe.c
index 4b8d6229b4..a5f5a38b16 100644
--- a/tests/qemucapsprobe.c
+++ b/tests/qemucapsprobe.c
@@ -72,7 +72,7 @@ main(int argc, char **argv)
         return EXIT_FAILURE;
 
     if (!(caps = virQEMUCapsNewForBinaryInternal(VIR_ARCH_NONE, argv[1], "/tmp",
-                                                 -1, -1, true)))
+                                                 -1, -1, 0, true)))
         return EXIT_FAILURE;
 
     virObjectUnref(caps);
diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c
index 2c7124bf26..f8182033fc 100644
--- a/tests/testutilsqemu.c
+++ b/tests/testutilsqemu.c
@@ -603,7 +603,7 @@ int qemuTestDriverInit(virQEMUDriver *driver)
 
     /* Using /dev/null for libDir and cacheDir automatically produces errors
      * upon attempt to use any of them */
-    driver->qemuCapsCache = virQEMUCapsCacheNew("/dev/null", "/dev/null", 0, 0);
+    driver->qemuCapsCache = virQEMUCapsCacheNew("/dev/null", "/dev/null", 0, 0, 0);
     if (!driver->qemuCapsCache)
         goto error;