From f4dc248a952aaebcc793c7809c6c083d9cc30d0c Mon Sep 17 00:00:00 2001
From: Jiri Denemark <jdenemar@redhat.com>
Date: Fri, 18 Oct 2024 14:40:48 +0200
Subject: [PATCH] domain_capabilities: Report CPU blockers
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

When a CPU model is reported as usable='no' an additional
<blockers model='...'> element is added for that CPU model to show which
features are missing for the CPU model to become usable.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
 docs/formatdomaincaps.rst                     |  56 +-
 src/conf/domain_capabilities.c                |  28 +
 .../domaincapsdata/qemu_5.2.0-q35.x86_64.xml  | 288 +++++++++
 .../domaincapsdata/qemu_5.2.0-tcg.x86_64.xml  | 543 +++++++++++++++++
 tests/domaincapsdata/qemu_5.2.0.x86_64.xml    | 288 +++++++++
 .../domaincapsdata/qemu_6.0.0-q35.x86_64.xml  | 296 +++++++++
 .../domaincapsdata/qemu_6.0.0-tcg.x86_64.xml  | 573 +++++++++++++++++
 tests/domaincapsdata/qemu_6.0.0.x86_64.xml    | 296 +++++++++
 .../domaincapsdata/qemu_6.1.0-q35.x86_64.xml  | 297 +++++++++
 .../domaincapsdata/qemu_6.1.0-tcg.x86_64.xml  | 574 ++++++++++++++++++
 tests/domaincapsdata/qemu_6.1.0.x86_64.xml    | 297 +++++++++
 .../domaincapsdata/qemu_6.2.0-q35.x86_64.xml  | 296 +++++++++
 .../domaincapsdata/qemu_6.2.0-tcg.x86_64.xml  | 572 +++++++++++++++++
 tests/domaincapsdata/qemu_6.2.0.x86_64.xml    | 296 +++++++++
 .../domaincapsdata/qemu_7.0.0-q35.x86_64.xml  | 296 +++++++++
 .../domaincapsdata/qemu_7.0.0-tcg.x86_64.xml  | 565 +++++++++++++++++
 tests/domaincapsdata/qemu_7.0.0.x86_64.xml    | 296 +++++++++
 .../domaincapsdata/qemu_7.1.0-q35.x86_64.xml  | 264 ++++++++
 .../domaincapsdata/qemu_7.1.0-tcg.x86_64.xml  | 515 ++++++++++++++++
 tests/domaincapsdata/qemu_7.1.0.x86_64.xml    | 264 ++++++++
 .../domaincapsdata/qemu_7.2.0-q35.x86_64.xml  | 264 ++++++++
 .../qemu_7.2.0-tcg.x86_64+hvf.xml             | 407 +++++++++++++
 .../domaincapsdata/qemu_7.2.0-tcg.x86_64.xml  | 407 +++++++++++++
 tests/domaincapsdata/qemu_7.2.0.x86_64.xml    | 264 ++++++++
 .../domaincapsdata/qemu_8.0.0-q35.x86_64.xml  | 304 ++++++++++
 .../domaincapsdata/qemu_8.0.0-tcg.x86_64.xml  | 453 ++++++++++++++
 tests/domaincapsdata/qemu_8.0.0.x86_64.xml    | 304 ++++++++++
 .../domaincapsdata/qemu_8.1.0-q35.x86_64.xml  | 386 ++++++++++++
 .../domaincapsdata/qemu_8.1.0-tcg.x86_64.xml  | 460 ++++++++++++++
 tests/domaincapsdata/qemu_8.1.0.s390x.xml     | 154 +++++
 tests/domaincapsdata/qemu_8.1.0.x86_64.xml    | 386 ++++++++++++
 .../domaincapsdata/qemu_8.2.0-q35.x86_64.xml  | 386 ++++++++++++
 .../domaincapsdata/qemu_8.2.0-tcg.x86_64.xml  | 452 ++++++++++++++
 tests/domaincapsdata/qemu_8.2.0.s390x.xml     | 154 +++++
 tests/domaincapsdata/qemu_8.2.0.x86_64.xml    | 386 ++++++++++++
 .../domaincapsdata/qemu_9.0.0-q35.x86_64.xml  | 386 ++++++++++++
 .../domaincapsdata/qemu_9.0.0-tcg.x86_64.xml  | 426 +++++++++++++
 tests/domaincapsdata/qemu_9.0.0.x86_64.xml    | 386 ++++++++++++
 .../domaincapsdata/qemu_9.1.0-q35.x86_64.xml  | 412 +++++++++++++
 .../domaincapsdata/qemu_9.1.0-tcg.x86_64.xml  | 445 ++++++++++++++
 tests/domaincapsdata/qemu_9.1.0.x86_64.xml    | 412 +++++++++++++
 .../domaincapsdata/qemu_9.2.0-q35.x86_64.xml  | 412 +++++++++++++
 .../domaincapsdata/qemu_9.2.0-tcg.x86_64.xml  | 445 ++++++++++++++
 tests/domaincapsdata/qemu_9.2.0.x86_64.xml    | 412 +++++++++++++
 44 files changed, 15784 insertions(+), 19 deletions(-)

diff --git a/docs/formatdomaincaps.rst b/docs/formatdomaincaps.rst
index 712d8b44f8..5309c6c251 100644
--- a/docs/formatdomaincaps.rst
+++ b/docs/formatdomaincaps.rst
@@ -194,9 +194,29 @@ CPUs <formatdomain.html#cpu-model-and-topology>`__.
        </mode>
        <mode name='custom' supported='yes'>
          <model usable='no' deprecated='no' vendor='Intel'>Broadwell</model>
+         <blockers model='Broadwell'>
+           <feature name='hle'/>
+           <feature name='rtm'/>
+         </blockers>
          <model usable='yes' deprecated='no' vendor='Intel'>Broadwell-noTSX</model>
-         <model usable='no' deprecated='yes' vendor='Intel'>Haswell</model>
          <model usable='no' deprecated='no' vendor='AMD'>EPYC-Milan</model>
+         <blockers model='EPYC-Milan'>
+           <feature name='clzero'/>
+           <feature name='cr8legacy'/>
+           <feature name='fxsr_opt'/>
+           <feature name='misalignsse'/>
+           <feature name='mmxext'/>
+           <feature name='osvw'/>
+           <feature name='perfctr_core'/>
+           <feature name='sse4a'/>
+           <feature name='wbnoinvd'/>
+           <feature name='xsaveerptr'/>
+         </blockers>
+         <model usable='no' deprecated='yes' vendor='Intel'>Haswell</model>
+         <blockers model='Haswell'>
+           <feature name='hle'/>
+           <feature name='rtm'/>
+         </blockers>
          ...
        </mode>
      </cpu>
@@ -230,24 +250,22 @@ more details about it:
    the model can be used directly on the host. A special value ``unknown``
    indicates libvirt does not have enough information to provide the usability
    data. When ``usable='no'`` the corresponding model cannot be used without
-   disabling some features that the CPU of such model is expected to have. The
-   list of features blocking usability of a particular CPU model is returned
-   as disabled features in the result of ``virConnectBaselineHypervisorCPU``
-   API (or ``virsh hypervisor-cpu-baseline``) when called on a CPU definition
-   using the CPU model and no additional feature elements. Models marked as
-   usable (``usable='yes'``) can be safely used in domain XMLs with
-   ``check='none'`` as the hypervisor guarantees the model can be used on the
-   current host and additional checks done by libvirt are redundant.
-   :since:`Since 10.2.0` libvirt automatically detects this situation and
-   avoids the redundant checks even when ``check='partial'`` is used, with
-   older releases disabling libvirt checks via ``check='none'`` for such models
-   is recommended to avoid needless issues with starting domains when libvirt's
-   definition of a particular model differs from hypervisor's definition. The
-   ``deprecated`` attribute reflects the hypervisor's policy on usage of this
-   model :since:`(since 7.1.0)`. The ``vendor`` attribute :since:`(since 8.9.0)`
-   contains the vendor of the CPU model for users who want to use CPU models
-   with specific vendors only. CPU models with undefined vendor will be listed
-   with ``vendor='unkwnown'``.
+   disabling some features that the CPU of such model is expected to have.
+   :since:`Since 10.9.0` each CPU model with ``usable='no'`` is followed by
+   a corresponding ``blockers`` element containing a list of features blocking
+   usability of the CPU model. Models marked as usable (``usable='yes'``) can
+   be safely used in domain XMLs with ``check='none'`` as the hypervisor
+   guarantees the model can be used on the current host and additional checks
+   done by libvirt are redundant. :since:`Since 10.2.0` libvirt automatically
+   detects this situation and avoids the redundant checks even when
+   ``check='partial'`` is used, with older releases disabling libvirt checks
+   via ``check='none'`` for such models is recommended to avoid needless issues
+   with starting domains when libvirt's definition of a particular model
+   differs from hypervisor's definition. The ``deprecated`` attribute reflects
+   the hypervisor's policy on usage of this model :since:`(since 7.1.0)`. The
+   ``vendor`` attribute :since:`(since 8.9.0)` contains the vendor of the CPU
+   model for users who want to use CPU models with specific vendors only. CPU
+   models with undefined vendor will be listed with ``vendor='unkwnown'``.
 
 I/O Threads
 ~~~~~~~~~~~
diff --git a/src/conf/domain_capabilities.c b/src/conf/domain_capabilities.c
index 6fd7ed3158..cf40d798e5 100644
--- a/src/conf/domain_capabilities.c
+++ b/src/conf/domain_capabilities.c
@@ -23,6 +23,7 @@
 #include "domain_capabilities.h"
 #include "domain_conf.h"
 #include "viralloc.h"
+#include "virstring.h"
 
 #define VIR_FROM_THIS VIR_FROM_CAPABILITIES
 
@@ -247,9 +248,23 @@ virDomainCapsCPUModelsCompare(const void *m1,
 void
 virDomainCapsCPUModelsSort(virDomainCapsCPUModels *cpuModels)
 {
+    size_t i;
+
     g_qsort_with_data(cpuModels->models, cpuModels->nmodels,
                       sizeof(*cpuModels->models),
                       virDomainCapsCPUModelsCompare, NULL);
+
+    for (i = 0; i < cpuModels->nmodels; i++) {
+        virDomainCapsCPUModel *model = cpuModels->models + i;
+
+        if (!model->blockers)
+            continue;
+
+        g_qsort_with_data(model->blockers, g_strv_length(model->blockers),
+                          sizeof(*model->blockers),
+                          virStringSortCompare, NULL);
+        virStringListRemoveDuplicates(&model->blockers);
+    }
 }
 
 
@@ -416,6 +431,19 @@ virDomainCapsCPUCustomFormat(virBuffer *buf,
             virBufferAddLit(buf, " vendor='unknown'");
 
         virBufferAsprintf(buf, ">%s</model>\n", model->name);
+
+        if (model->blockers) {
+            char **blocker;
+
+            virBufferAsprintf(buf, "<blockers model='%s'>\n", model->name);
+            virBufferAdjustIndent(buf, 2);
+
+            for (blocker = model->blockers; *blocker; blocker++)
+                virBufferAsprintf(buf, "<feature name='%s'/>\n", *blocker);
+
+            virBufferAdjustIndent(buf, -2);
+            virBufferAddLit(buf, "</blockers>\n");
+        }
     }
 
     virBufferAdjustIndent(buf, -2);
diff --git a/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml
index b082e3bfb7..81bf0ceb00 100644
--- a/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0-q35.x86_64.xml
@@ -64,56 +64,344 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml
index bd004e0b6e..054bf4a88b 100644
--- a/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0-tcg.x86_64.xml
@@ -76,46 +76,586 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='avx'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -126,6 +666,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_5.2.0.x86_64.xml b/tests/domaincapsdata/qemu_5.2.0.x86_64.xml
index 0979dda37f..f298829e34 100644
--- a/tests/domaincapsdata/qemu_5.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_5.2.0.x86_64.xml
@@ -63,56 +63,344 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml
index 1c4ed9c490..c738f2f9ed 100644
--- a/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0-q35.x86_64.xml
@@ -64,57 +64,353 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml
index ec5ea85637..bb1c66cdbf 100644
--- a/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0-tcg.x86_64.xml
@@ -77,47 +77,617 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='svme-addr-chk'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='avx'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -128,6 +698,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.0.0.x86_64.xml b/tests/domaincapsdata/qemu_6.0.0.x86_64.xml
index 3a9c2050a5..1efa0578bd 100644
--- a/tests/domaincapsdata/qemu_6.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.0.0.x86_64.xml
@@ -63,57 +63,353 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml
index b98f628fcb..fe22898504 100644
--- a/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.1.0-q35.x86_64.xml
@@ -65,57 +65,354 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml
index 1e4c60fe2f..11ef8be5e3 100644
--- a/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.1.0-tcg.x86_64.xml
@@ -77,47 +77,618 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx2'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='svme-addr-chk'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='avx'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -128,6 +699,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.1.0.x86_64.xml b/tests/domaincapsdata/qemu_6.1.0.x86_64.xml
index c22f1a398c..43ed790a20 100644
--- a/tests/domaincapsdata/qemu_6.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.1.0.x86_64.xml
@@ -64,57 +64,354 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml
index ddeabd8fa6..a7240ff9a7 100644
--- a/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0-q35.x86_64.xml
@@ -65,57 +65,353 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml
index f9e62f215f..40a69c1ce4 100644
--- a/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0-tcg.x86_64.xml
@@ -79,47 +79,616 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='umip'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='avx'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='umip'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -130,6 +699,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_6.2.0.x86_64.xml b/tests/domaincapsdata/qemu_6.2.0.x86_64.xml
index 010d3199fa..1452c4ddd1 100644
--- a/tests/domaincapsdata/qemu_6.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_6.2.0.x86_64.xml
@@ -64,57 +64,353 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml
index 0451ee3439..c118289a42 100644
--- a/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0-q35.x86_64.xml
@@ -66,57 +66,353 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml
index a7ce3641bb..89b5758040 100644
--- a/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0-tcg.x86_64.xml
@@ -80,47 +80,609 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='avx'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -131,6 +693,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.0.0.x86_64.xml b/tests/domaincapsdata/qemu_7.0.0.x86_64.xml
index c980906edb..935cdcadfd 100644
--- a/tests/domaincapsdata/qemu_7.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.0.0.x86_64.xml
@@ -65,57 +65,353 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client</model>
+      <blockers model='Icelake-Client'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' deprecated='yes' vendor='Intel'>Icelake-Client-noTSX</model>
+      <blockers model='Icelake-Client-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml
index 83a75cc73d..58a39ed39c 100644
--- a/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0-q35.x86_64.xml
@@ -67,55 +67,319 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml
index 411eca05c9..387195c12a 100644
--- a/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0-tcg.x86_64.xml
@@ -80,45 +80,557 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='clzero'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='avx'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='avx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx'/>
+        <feature name='avx2'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='f16c'/>
+        <feature name='fma'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -129,6 +641,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.1.0.x86_64.xml b/tests/domaincapsdata/qemu_7.1.0.x86_64.xml
index 6113ccab7c..5082cc119f 100644
--- a/tests/domaincapsdata/qemu_7.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.1.0.x86_64.xml
@@ -66,55 +66,319 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml
index 3505d0152d..bf6b22a6ad 100644
--- a/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.2.0-q35.x86_64.xml
@@ -72,55 +72,319 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64+hvf.xml b/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64+hvf.xml
index 922e352362..6cc40ab932 100644
--- a/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64+hvf.xml
+++ b/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64+hvf.xml
@@ -69,45 +69,449 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -118,6 +522,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml
index 922e352362..6cc40ab932 100644
--- a/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.2.0-tcg.x86_64.xml
@@ -69,45 +69,449 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fsrm'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -118,6 +522,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_7.2.0.x86_64.xml b/tests/domaincapsdata/qemu_7.2.0.x86_64.xml
index cb9ad6bb2b..3c698aea33 100644
--- a/tests/domaincapsdata/qemu_7.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_7.2.0.x86_64.xml
@@ -71,55 +71,319 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_8.0.0-q35.x86_64.xml
index bd6cbb4066..c5c1b0fa69 100644
--- a/tests/domaincapsdata/qemu_8.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.0.0-q35.x86_64.xml
@@ -72,56 +72,360 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_8.0.0-tcg.x86_64.xml
index ea8f687b7b..971d3398ce 100644
--- a/tests/domaincapsdata/qemu_8.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.0.0-tcg.x86_64.xml
@@ -73,46 +73,496 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='wbnoinvd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaveerptr'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='3dnowprefetch'/>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='3dnowprefetch'/>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mds-no'/>
+        <feature name='pcid'/>
+        <feature name='pschange-mc-no'/>
+        <feature name='rdctl-no'/>
+        <feature name='rdpid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='sha-ni'/>
+        <feature name='skip-l1dfl-vmentry'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='taa-no'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='wbnoinvd'/>
+        <feature name='x2apic'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='3dnowprefetch'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rdseed'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='3dnowprefetch'/>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='rdseed'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -123,6 +573,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.0.0.x86_64.xml b/tests/domaincapsdata/qemu_8.0.0.x86_64.xml
index 2820a95b37..34341b8559 100644
--- a/tests/domaincapsdata/qemu_8.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.0.0.x86_64.xml
@@ -71,56 +71,360 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-Rome</model>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_8.1.0-q35.x86_64.xml
index 4761f862e4..5ad09e197c 100644
--- a/tests/domaincapsdata/qemu_8.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.1.0-q35.x86_64.xml
@@ -74,58 +74,444 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_8.1.0-tcg.x86_64.xml
index 585b6540a3..a24986f04c 100644
--- a/tests/domaincapsdata/qemu_8.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.1.0-tcg.x86_64.xml
@@ -74,48 +74,505 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='gfni'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='lfence-always-serializing'/>
+        <feature name='misalignsse'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='nrip-save'/>
+        <feature name='null-sel-clr-base'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='sha-ni'/>
+        <feature name='stibp-always-on'/>
+        <feature name='topoext'/>
+        <feature name='vnmi'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='sha-ni'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='prefetchiti'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='sha-ni'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -126,6 +583,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.1.0.s390x.xml b/tests/domaincapsdata/qemu_8.1.0.s390x.xml
index 5e1db1a65a..3564f74cad 100644
--- a/tests/domaincapsdata/qemu_8.1.0.s390x.xml
+++ b/tests/domaincapsdata/qemu_8.1.0.s390x.xml
@@ -78,42 +78,163 @@
     </mode>
     <mode name='custom' supported='yes'>
       <model usable='no' vendor='IBM'>gen15a</model>
+      <blockers model='gen15a'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>gen15a-base</model>
       <model usable='no' vendor='IBM'>gen15b</model>
+      <blockers model='gen15b'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>gen15b-base</model>
       <model usable='no' vendor='IBM'>gen16a</model>
+      <blockers model='gen16a'>
+        <feature name='beareh'/>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='nnpa'/>
+        <feature name='pai'/>
+        <feature name='paie'/>
+        <feature name='rdp'/>
+        <feature name='ri'/>
+        <feature name='type'/>
+        <feature name='vxpdeh2'/>
+      </blockers>
       <model usable='no' vendor='IBM'>gen16a-base</model>
+      <blockers model='gen16a-base'>
+        <feature name='type'/>
+      </blockers>
       <model usable='no' vendor='IBM'>gen16b</model>
+      <blockers model='gen16b'>
+        <feature name='beareh'/>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='nnpa'/>
+        <feature name='pai'/>
+        <feature name='paie'/>
+        <feature name='rdp'/>
+        <feature name='ri'/>
+        <feature name='type'/>
+        <feature name='vxpdeh2'/>
+      </blockers>
       <model usable='no' vendor='IBM'>gen16b-base</model>
+      <blockers model='gen16b-base'>
+        <feature name='type'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>max</model>
       <model usable='yes' vendor='unknown'>qemu</model>
       <model usable='no' vendor='IBM'>z10BC</model>
+      <blockers model='z10BC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10BC-base</model>
       <model usable='no' vendor='IBM'>z10BC.2</model>
+      <blockers model='z10BC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10BC.2-base</model>
       <model usable='no' vendor='IBM'>z10EC</model>
+      <blockers model='z10EC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10EC-base</model>
       <model usable='no' vendor='IBM'>z10EC.2</model>
+      <blockers model='z10EC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10EC.2-base</model>
       <model usable='no' vendor='IBM'>z10EC.3</model>
+      <blockers model='z10EC.3'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10EC.3-base</model>
       <model usable='no' vendor='IBM'>z114</model>
+      <blockers model='z114'>
+        <feature name='cmm'/>
+        <feature name='ipter'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z114-base</model>
       <model usable='no' vendor='IBM'>z13</model>
+      <blockers model='z13'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z13-base</model>
       <model usable='no' vendor='IBM'>z13.2</model>
+      <blockers model='z13.2'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z13.2-base</model>
       <model usable='no' vendor='IBM'>z13s</model>
+      <blockers model='z13s'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z13s-base</model>
       <model usable='no' vendor='IBM'>z14</model>
+      <blockers model='z14'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z14-base</model>
       <model usable='no' vendor='IBM'>z14.2</model>
+      <blockers model='z14.2'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z14.2-base</model>
       <model usable='no' vendor='IBM'>z14ZR1</model>
+      <blockers model='z14ZR1'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z14ZR1-base</model>
       <model usable='no' vendor='IBM'>z196</model>
+      <blockers model='z196'>
+        <feature name='cmm'/>
+        <feature name='ipter'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z196-base</model>
       <model usable='no' vendor='IBM'>z196.2</model>
+      <blockers model='z196.2'>
+        <feature name='cmm'/>
+        <feature name='ipter'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z196.2-base</model>
       <model usable='yes' vendor='IBM'>z800</model>
       <model usable='yes' vendor='IBM'>z800-base</model>
@@ -140,20 +261,53 @@
       <model usable='yes' vendor='IBM'>z990.5</model>
       <model usable='yes' vendor='IBM'>z990.5-base</model>
       <model usable='no' vendor='IBM'>z9BC</model>
+      <blockers model='z9BC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9BC-base</model>
       <model usable='no' vendor='IBM'>z9BC.2</model>
+      <blockers model='z9BC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9BC.2-base</model>
       <model usable='no' vendor='IBM'>z9EC</model>
+      <blockers model='z9EC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9EC-base</model>
       <model usable='no' vendor='IBM'>z9EC.2</model>
+      <blockers model='z9EC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9EC.2-base</model>
       <model usable='no' vendor='IBM'>z9EC.3</model>
+      <blockers model='z9EC.3'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9EC.3-base</model>
       <model usable='no' vendor='IBM'>zBC12</model>
+      <blockers model='zBC12'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>zBC12-base</model>
       <model usable='no' vendor='IBM'>zEC12</model>
+      <blockers model='zEC12'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>zEC12-base</model>
       <model usable='no' vendor='IBM'>zEC12.2</model>
+      <blockers model='zEC12.2'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>zEC12.2-base</model>
     </mode>
   </cpu>
diff --git a/tests/domaincapsdata/qemu_8.1.0.x86_64.xml b/tests/domaincapsdata/qemu_8.1.0.x86_64.xml
index 28e0757b86..c93e05ec60 100644
--- a/tests/domaincapsdata/qemu_8.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.1.0.x86_64.xml
@@ -73,58 +73,444 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_8.2.0-q35.x86_64.xml
index 0a91be679b..fda177a385 100644
--- a/tests/domaincapsdata/qemu_8.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.2.0-q35.x86_64.xml
@@ -75,58 +75,444 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_8.2.0-tcg.x86_64.xml
index 7744bf95d3..694d55f5d8 100644
--- a/tests/domaincapsdata/qemu_8.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.2.0-tcg.x86_64.xml
@@ -73,48 +73,497 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='gfni'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='lfence-always-serializing'/>
+        <feature name='misalignsse'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='nrip-save'/>
+        <feature name='null-sel-clr-base'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='stibp-always-on'/>
+        <feature name='topoext'/>
+        <feature name='vnmi'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='prefetchiti'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='x2apic'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='x2apic'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -125,6 +574,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_8.2.0.s390x.xml b/tests/domaincapsdata/qemu_8.2.0.s390x.xml
index 67ddc87b31..bcd3f68503 100644
--- a/tests/domaincapsdata/qemu_8.2.0.s390x.xml
+++ b/tests/domaincapsdata/qemu_8.2.0.s390x.xml
@@ -78,42 +78,163 @@
     </mode>
     <mode name='custom' supported='yes'>
       <model usable='no' vendor='IBM'>gen15a</model>
+      <blockers model='gen15a'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>gen15a-base</model>
       <model usable='no' vendor='IBM'>gen15b</model>
+      <blockers model='gen15b'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>gen15b-base</model>
       <model usable='no' vendor='IBM'>gen16a</model>
+      <blockers model='gen16a'>
+        <feature name='beareh'/>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='nnpa'/>
+        <feature name='pai'/>
+        <feature name='paie'/>
+        <feature name='rdp'/>
+        <feature name='ri'/>
+        <feature name='type'/>
+        <feature name='vxpdeh2'/>
+      </blockers>
       <model usable='no' vendor='IBM'>gen16a-base</model>
+      <blockers model='gen16a-base'>
+        <feature name='type'/>
+      </blockers>
       <model usable='no' vendor='IBM'>gen16b</model>
+      <blockers model='gen16b'>
+        <feature name='beareh'/>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='nnpa'/>
+        <feature name='pai'/>
+        <feature name='paie'/>
+        <feature name='rdp'/>
+        <feature name='ri'/>
+        <feature name='type'/>
+        <feature name='vxpdeh2'/>
+      </blockers>
       <model usable='no' vendor='IBM'>gen16b-base</model>
+      <blockers model='gen16b-base'>
+        <feature name='type'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>max</model>
       <model usable='yes' vendor='unknown'>qemu</model>
       <model usable='no' vendor='IBM'>z10BC</model>
+      <blockers model='z10BC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10BC-base</model>
       <model usable='no' vendor='IBM'>z10BC.2</model>
+      <blockers model='z10BC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10BC.2-base</model>
       <model usable='no' vendor='IBM'>z10EC</model>
+      <blockers model='z10EC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10EC-base</model>
       <model usable='no' vendor='IBM'>z10EC.2</model>
+      <blockers model='z10EC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10EC.2-base</model>
       <model usable='no' vendor='IBM'>z10EC.3</model>
+      <blockers model='z10EC.3'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z10EC.3-base</model>
       <model usable='no' vendor='IBM'>z114</model>
+      <blockers model='z114'>
+        <feature name='cmm'/>
+        <feature name='ipter'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z114-base</model>
       <model usable='no' vendor='IBM'>z13</model>
+      <blockers model='z13'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z13-base</model>
       <model usable='no' vendor='IBM'>z13.2</model>
+      <blockers model='z13.2'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z13.2-base</model>
       <model usable='no' vendor='IBM'>z13s</model>
+      <blockers model='z13s'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z13s-base</model>
       <model usable='no' vendor='IBM'>z14</model>
+      <blockers model='z14'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z14-base</model>
       <model usable='no' vendor='IBM'>z14.2</model>
+      <blockers model='z14.2'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z14.2-base</model>
       <model usable='no' vendor='IBM'>z14ZR1</model>
+      <blockers model='z14ZR1'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='mepoch'/>
+        <feature name='mepochptff'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z14ZR1-base</model>
       <model usable='no' vendor='IBM'>z196</model>
+      <blockers model='z196'>
+        <feature name='cmm'/>
+        <feature name='ipter'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z196-base</model>
       <model usable='no' vendor='IBM'>z196.2</model>
+      <blockers model='z196.2'>
+        <feature name='cmm'/>
+        <feature name='ipter'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z196.2-base</model>
       <model usable='yes' vendor='IBM'>z800</model>
       <model usable='yes' vendor='IBM'>z800-base</model>
@@ -140,20 +261,53 @@
       <model usable='yes' vendor='IBM'>z990.5</model>
       <model usable='yes' vendor='IBM'>z990.5-base</model>
       <model usable='no' vendor='IBM'>z9BC</model>
+      <blockers model='z9BC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9BC-base</model>
       <model usable='no' vendor='IBM'>z9BC.2</model>
+      <blockers model='z9BC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9BC.2-base</model>
       <model usable='no' vendor='IBM'>z9EC</model>
+      <blockers model='z9EC'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9EC-base</model>
       <model usable='no' vendor='IBM'>z9EC.2</model>
+      <blockers model='z9EC.2'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9EC.2-base</model>
       <model usable='no' vendor='IBM'>z9EC.3</model>
+      <blockers model='z9EC.3'>
+        <feature name='cmm'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>z9EC.3-base</model>
       <model usable='no' vendor='IBM'>zBC12</model>
+      <blockers model='zBC12'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>zBC12-base</model>
       <model usable='no' vendor='IBM'>zEC12</model>
+      <blockers model='zEC12'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>zEC12-base</model>
       <model usable='no' vendor='IBM'>zEC12.2</model>
+      <blockers model='zEC12.2'>
+        <feature name='cmm'/>
+        <feature name='edat2'/>
+        <feature name='ipter'/>
+        <feature name='ri'/>
+      </blockers>
       <model usable='yes' vendor='IBM'>zEC12.2-base</model>
     </mode>
   </cpu>
diff --git a/tests/domaincapsdata/qemu_8.2.0.x86_64.xml b/tests/domaincapsdata/qemu_8.2.0.x86_64.xml
index bbc940d77d..35badddb3d 100644
--- a/tests/domaincapsdata/qemu_8.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_8.2.0.x86_64.xml
@@ -74,58 +74,444 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.0.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_9.0.0-q35.x86_64.xml
index 3c3358026b..01e31c538f 100644
--- a/tests/domaincapsdata/qemu_9.0.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.0.0-q35.x86_64.xml
@@ -75,58 +75,444 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.0.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_9.0.0-tcg.x86_64.xml
index b30babfaee..6449ffefb2 100644
--- a/tests/domaincapsdata/qemu_9.0.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.0.0-tcg.x86_64.xml
@@ -75,48 +75,471 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='gfni'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='lfence-always-serializing'/>
+        <feature name='misalignsse'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='nrip-save'/>
+        <feature name='null-sel-clr-base'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='stibp-always-on'/>
+        <feature name='topoext'/>
+        <feature name='vnmi'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='prefetchiti'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -127,6 +550,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.0.0.x86_64.xml b/tests/domaincapsdata/qemu_9.0.0.x86_64.xml
index 632c076681..3f3f25cf23 100644
--- a/tests/domaincapsdata/qemu_9.0.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.0.0.x86_64.xml
@@ -74,58 +74,444 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.1.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_9.1.0-q35.x86_64.xml
index a545b88560..6dd5dcd7a5 100644
--- a/tests/domaincapsdata/qemu_9.1.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.1.0-q35.x86_64.xml
@@ -79,59 +79,471 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SierraForest</model>
+      <blockers model='SierraForest'>
+        <feature name='avx-ifma'/>
+        <feature name='avx-ne-convert'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx-vnni-int8'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='cmpccxadd'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='gfni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='psdp-no'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.1.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_9.1.0-tcg.x86_64.xml
index b47a85c294..739af1fa35 100644
--- a/tests/domaincapsdata/qemu_9.1.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.1.0-tcg.x86_64.xml
@@ -74,49 +74,491 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='gfni'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='lfence-always-serializing'/>
+        <feature name='misalignsse'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='nrip-save'/>
+        <feature name='null-sel-clr-base'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='stibp-always-on'/>
+        <feature name='topoext'/>
+        <feature name='vnmi'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='prefetchiti'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SierraForest</model>
+      <blockers model='SierraForest'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-ifma'/>
+        <feature name='avx-ne-convert'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx-vnni-int8'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -127,6 +569,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.1.0.x86_64.xml b/tests/domaincapsdata/qemu_9.1.0.x86_64.xml
index dad7e70424..46a54d8c53 100644
--- a/tests/domaincapsdata/qemu_9.1.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.1.0.x86_64.xml
@@ -78,59 +78,471 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SierraForest</model>
+      <blockers model='SierraForest'>
+        <feature name='avx-ifma'/>
+        <feature name='avx-ne-convert'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx-vnni-int8'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='cmpccxadd'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='gfni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='psdp-no'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.2.0-q35.x86_64.xml b/tests/domaincapsdata/qemu_9.2.0-q35.x86_64.xml
index 9cbed26a3e..deff784eeb 100644
--- a/tests/domaincapsdata/qemu_9.2.0-q35.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.2.0-q35.x86_64.xml
@@ -79,59 +79,471 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SierraForest</model>
+      <blockers model='SierraForest'>
+        <feature name='avx-ifma'/>
+        <feature name='avx-ne-convert'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx-vnni-int8'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='cmpccxadd'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='gfni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='psdp-no'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.2.0-tcg.x86_64.xml b/tests/domaincapsdata/qemu_9.2.0-tcg.x86_64.xml
index 2b040ce086..40da25e78b 100644
--- a/tests/domaincapsdata/qemu_9.2.0-tcg.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.2.0-tcg.x86_64.xml
@@ -74,49 +74,491 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='stibp'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Hygon'>Dhyana</model>
+      <blockers model='Dhyana'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC</model>
+      <blockers model='EPYC'>
+        <feature name='fxsr_opt'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='gfni'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='lfence-always-serializing'/>
+        <feature name='misalignsse'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='nrip-save'/>
+        <feature name='null-sel-clr-base'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='stibp-always-on'/>
+        <feature name='topoext'/>
+        <feature name='vnmi'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-IBPB</model>
+      <blockers model='EPYC-IBPB'>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='amd-ssbd'/>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='pcid'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='amd-stibp'/>
+        <feature name='clzero'/>
+        <feature name='fxsr_opt'/>
+        <feature name='ibpb'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='osvw'/>
+        <feature name='perfctr_core'/>
+        <feature name='topoext'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='prefetchiti'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='no' vendor='AMD'>Opteron_G3</model>
+      <blockers model='Opteron_G3'>
+        <feature name='misalignsse'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='misalignsse'/>
+        <feature name='nrip-save'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='no' vendor='Intel'>SandyBridge</model>
+      <blockers model='SandyBridge'>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SierraForest</model>
+      <blockers model='SierraForest'>
+        <feature name='arch-capabilities'/>
+        <feature name='avx-ifma'/>
+        <feature name='avx-ne-convert'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx-vnni-int8'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pcid'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsavec'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='arch-capabilities'/>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+        <feature name='ssbd'/>
+        <feature name='tsc-deadline'/>
+        <feature name='xsavec'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>athlon</model>
       <model usable='yes' vendor='Intel'>core2duo</model>
       <model usable='yes' vendor='Intel'>coreduo</model>
@@ -127,6 +569,9 @@
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='fxsr_opt'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
diff --git a/tests/domaincapsdata/qemu_9.2.0.x86_64.xml b/tests/domaincapsdata/qemu_9.2.0.x86_64.xml
index fa4651e8ac..393d24c2ba 100644
--- a/tests/domaincapsdata/qemu_9.2.0.x86_64.xml
+++ b/tests/domaincapsdata/qemu_9.2.0.x86_64.xml
@@ -78,59 +78,471 @@
     <mode name='custom' supported='yes'>
       <model usable='yes' vendor='unknown'>486</model>
       <model usable='no' vendor='Intel'>Broadwell</model>
+      <blockers model='Broadwell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-IBRS</model>
+      <blockers model='Broadwell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX</model>
+      <blockers model='Broadwell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Broadwell-noTSX-IBRS</model>
+      <blockers model='Broadwell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server</model>
+      <blockers model='Cascadelake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Cascadelake-Server-noTSX</model>
+      <blockers model='Cascadelake-Server-noTSX'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Conroe</model>
       <model usable='no' vendor='Intel'>Cooperlake</model>
+      <blockers model='Cooperlake'>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+      </blockers>
       <model usable='yes' vendor='Hygon'>Dhyana</model>
       <model usable='yes' vendor='AMD'>EPYC</model>
       <model usable='no' vendor='AMD'>EPYC-Genoa</model>
+      <blockers model='EPYC-Genoa'>
+        <feature name='amd-psfd'/>
+        <feature name='auto-ibrs'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='gfni'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='no-nested-data-bp'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='stibp-always-on'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>EPYC-IBPB</model>
       <model usable='no' vendor='AMD'>EPYC-Milan</model>
+      <blockers model='EPYC-Milan'>
+        <feature name='erms'/>
+        <feature name='fsrm'/>
+        <feature name='ibrs'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='AMD'>EPYC-Rome</model>
+      <blockers model='EPYC-Rome'>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>GraniteRapids</model>
+      <blockers model='GraniteRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-fp16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='prefetchiti'/>
+        <feature name='psdp-no'/>
+        <feature name='rtm'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell</model>
+      <blockers model='Haswell'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-IBRS</model>
+      <blockers model='Haswell-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX</model>
+      <blockers model='Haswell-noTSX'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Haswell-noTSX-IBRS</model>
+      <blockers model='Haswell-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server</model>
+      <blockers model='Icelake-Server'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Icelake-Server-noTSX</model>
+      <blockers model='Icelake-Server-noTSX'>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge</model>
+      <blockers model='IvyBridge'>
+        <feature name='erms'/>
+      </blockers>
       <model usable='no' vendor='Intel'>IvyBridge-IBRS</model>
+      <blockers model='IvyBridge-IBRS'>
+        <feature name='erms'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Nehalem</model>
       <model usable='no' vendor='Intel'>Nehalem-IBRS</model>
+      <blockers model='Nehalem-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='yes' vendor='AMD'>Opteron_G1</model>
       <model usable='yes' vendor='AMD'>Opteron_G2</model>
       <model usable='yes' vendor='AMD'>Opteron_G3</model>
       <model usable='no' vendor='AMD'>Opteron_G4</model>
+      <blockers model='Opteron_G4'>
+        <feature name='fma4'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='no' vendor='AMD'>Opteron_G5</model>
+      <blockers model='Opteron_G5'>
+        <feature name='fma4'/>
+        <feature name='tbm'/>
+        <feature name='xop'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Penryn</model>
       <model usable='yes' vendor='Intel'>SandyBridge</model>
       <model usable='no' vendor='Intel'>SandyBridge-IBRS</model>
+      <blockers model='SandyBridge-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SapphireRapids</model>
+      <blockers model='SapphireRapids'>
+        <feature name='amx-bf16'/>
+        <feature name='amx-int8'/>
+        <feature name='amx-tile'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx512-bf16'/>
+        <feature name='avx512-fp16'/>
+        <feature name='avx512-vpopcntdq'/>
+        <feature name='avx512bitalg'/>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512ifma'/>
+        <feature name='avx512vbmi'/>
+        <feature name='avx512vbmi2'/>
+        <feature name='avx512vl'/>
+        <feature name='avx512vnni'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='erms'/>
+        <feature name='fsrc'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='fzrm'/>
+        <feature name='gfni'/>
+        <feature name='hle'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='la57'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='taa-no'/>
+        <feature name='tsx-ldtrk'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xfd'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>SierraForest</model>
+      <blockers model='SierraForest'>
+        <feature name='avx-ifma'/>
+        <feature name='avx-ne-convert'/>
+        <feature name='avx-vnni'/>
+        <feature name='avx-vnni-int8'/>
+        <feature name='bus-lock-detect'/>
+        <feature name='cmpccxadd'/>
+        <feature name='erms'/>
+        <feature name='fbsdp-no'/>
+        <feature name='fsrm'/>
+        <feature name='fsrs'/>
+        <feature name='gfni'/>
+        <feature name='ibrs-all'/>
+        <feature name='invpcid'/>
+        <feature name='mcdt-no'/>
+        <feature name='pbrsb-no'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='psdp-no'/>
+        <feature name='sbdr-ssdp-no'/>
+        <feature name='serialize'/>
+        <feature name='spec-ctrl'/>
+        <feature name='vaes'/>
+        <feature name='vpclmulqdq'/>
+        <feature name='xsaves'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client</model>
+      <blockers model='Skylake-Client'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-IBRS</model>
+      <blockers model='Skylake-Client-IBRS'>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Client-noTSX-IBRS</model>
+      <blockers model='Skylake-Client-noTSX-IBRS'>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server</model>
+      <blockers model='Skylake-Server'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-IBRS</model>
+      <blockers model='Skylake-Server-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='hle'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='rtm'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Skylake-Server-noTSX-IBRS</model>
+      <blockers model='Skylake-Server-noTSX-IBRS'>
+        <feature name='avx512bw'/>
+        <feature name='avx512cd'/>
+        <feature name='avx512dq'/>
+        <feature name='avx512f'/>
+        <feature name='avx512vl'/>
+        <feature name='erms'/>
+        <feature name='invpcid'/>
+        <feature name='pcid'/>
+        <feature name='pku'/>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='Intel'>Snowridge</model>
+      <blockers model='Snowridge'>
+        <feature name='cldemote'/>
+        <feature name='core-capability'/>
+        <feature name='erms'/>
+        <feature name='gfni'/>
+        <feature name='movdir64b'/>
+        <feature name='movdiri'/>
+        <feature name='mpx'/>
+        <feature name='spec-ctrl'/>
+        <feature name='split-lock-detect'/>
+      </blockers>
       <model usable='yes' vendor='Intel'>Westmere</model>
       <model usable='no' vendor='Intel'>Westmere-IBRS</model>
+      <blockers model='Westmere-IBRS'>
+        <feature name='spec-ctrl'/>
+      </blockers>
       <model usable='no' vendor='AMD'>athlon</model>
+      <blockers model='athlon'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='no' vendor='Intel'>core2duo</model>
+      <blockers model='core2duo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='no' vendor='Intel'>coreduo</model>
+      <blockers model='coreduo'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>kvm32</model>
       <model usable='yes' vendor='unknown'>kvm64</model>
       <model usable='no' vendor='Intel'>n270</model>
+      <blockers model='n270'>
+        <feature name='ss'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>pentium</model>
       <model usable='yes' vendor='unknown'>pentium2</model>
       <model usable='yes' vendor='unknown'>pentium3</model>
       <model usable='no' vendor='AMD'>phenom</model>
+      <blockers model='phenom'>
+        <feature name='3dnow'/>
+        <feature name='3dnowext'/>
+      </blockers>
       <model usable='yes' vendor='unknown'>qemu32</model>
       <model usable='yes' vendor='unknown'>qemu64</model>
     </mode>
-- 
2.47.2