From f27113ac4b180f85d92ba96c6e2b0065983945da Mon Sep 17 00:00:00 2001
Message-ID: <f27113ac4b180f85d92ba96c6e2b0065983945da.1784297532.git.jdenemar@redhat.com>
From: Peter Krempa <pkrempa@redhat.com>
Date: Tue, 9 Jun 2026 14:33:04 +0200
Subject: [PATCH] qemuxmlconftest: Add test cases for configs asking for
 'virtio-gpu-gl' or 'virtio-vga-gl' without the capability

The capability check in 'qemuValidateDomainDeviceDefVideo' which
validates whether a <video> definition with acceleration enabled is
possible is only aggregate, thus validates that any '-gl' video backend
is available.

Since qemu compiles each backend into a separate module it's possible to
have an installation where 'virtio-gpu-pci-gl' exist but 'virtio-vga-gl'
doesn't and it will not be rejected at validation. The commandline
though will generate a device *without* the '-gl' which is ABI
incompatible with the counterpart which does have '-gl', but the VM
starts. If such a VM is then migrated to a deployment which does have
the '-gl' variant available, migration will fail because qemu will
generate the '-gl' device as we don't record this fact in the XML.

This test case captures this situation which will be fixed later.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit a30a5a89e7702c7ae31344893735442385ce5777)

https://redhat.atlassian.net/browse/RHEL-186019

  Conflicts:
   - tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.args
   - tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.args
      Context; patch tweaking monitor FD passing in tests not backported

https://redhat.atlassian.net/browse/RHEL-177646 (rhel-9.9)
---
 ....QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.args | 35 ++++++++++++++
 ...t.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.xml | 46 +++++++++++++++++++
 ...test.QEMU_CAPS_VIRTIO_VGA_GL-disabled.args | 35 ++++++++++++++
 ...atest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.xml | 46 +++++++++++++++++++
 tests/qemuxmlconftest.c                       | 10 ++++
 5 files changed, 172 insertions(+)
 create mode 100644 tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.args
 create mode 100644 tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.xml
 create mode 100644 tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.args
 create mode 100644 tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.xml

diff --git a/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.args b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.args
new file mode 100644
index 0000000000..297b919b5b
--- /dev/null
+++ b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.args
@@ -0,0 +1,35 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \
+-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \
+-accel tcg \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-device '{"driver":"virtio-vga-gl","id":"video0","max_outputs":1,"bus":"pci.0","addr":"0x2"}' \
+-device '{"driver":"virtio-gpu-pci","id":"video1","max_outputs":1,"bus":"pci.0","addr":"0x4"}' \
+-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x3"}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.xml b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.xml
new file mode 100644
index 0000000000..991141c643
--- /dev/null
+++ b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled.xml
@@ -0,0 +1,46 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='ide' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+    </controller>
+    <controller type='usb' index='0' model='piix3-uhci'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <audio id='1' type='none'/>
+    <video>
+      <model type='virtio' heads='1' primary='yes'>
+        <acceleration accel3d='yes'/>
+      </model>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </video>
+    <video>
+      <model type='virtio' heads='1'>
+        <acceleration accel3d='yes'/>
+      </model>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </video>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>
diff --git a/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.args b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.args
new file mode 100644
index 0000000000..d649dc06f8
--- /dev/null
+++ b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.args
@@ -0,0 +1,35 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \
+-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \
+-accel tcg \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-device '{"driver":"virtio-vga","id":"video0","max_outputs":1,"bus":"pci.0","addr":"0x2"}' \
+-device '{"driver":"virtio-gpu-gl-pci","id":"video1","max_outputs":1,"bus":"pci.0","addr":"0x4"}' \
+-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x3"}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.xml b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.xml
new file mode 100644
index 0000000000..991141c643
--- /dev/null
+++ b/tests/qemuxmlconfdata/video-virtio-vga-gpu-gl.x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled.xml
@@ -0,0 +1,46 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='ide' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+    </controller>
+    <controller type='usb' index='0' model='piix3-uhci'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <audio id='1' type='none'/>
+    <video>
+      <model type='virtio' heads='1' primary='yes'>
+        <acceleration accel3d='yes'/>
+      </model>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </video>
+    <video>
+      <model type='virtio' heads='1'>
+        <acceleration accel3d='yes'/>
+      </model>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </video>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>
diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c
index b00b71e10e..8424bdf709 100644
--- a/tests/qemuxmlconftest.c
+++ b/tests/qemuxmlconftest.c
@@ -2778,6 +2778,16 @@ mymain(void)
     DO_TEST_CAPS_LATEST("video-virtio-blob-on");
     DO_TEST_CAPS_LATEST("video-virtio-blob-off");
     DO_TEST_CAPS_LATEST("video-virtio-vga-gpu-gl");
+    DO_TEST_FULL("video-virtio-vga-gpu-gl", ".x86_64-latest.QEMU_CAPS_VIRTIO_VGA_GL-disabled",
+                 ARG_CAPS_ARCH, "x86_64",
+                 ARG_CAPS_VER, "latest",
+                 ARG_QEMU_CAPS_DEL, QEMU_CAPS_VIRTIO_VGA_GL, QEMU_CAPS_LAST,
+                 ARG_END);
+    DO_TEST_FULL("video-virtio-vga-gpu-gl", ".x86_64-latest.QEMU_CAPS_VIRTIO_GPU_GL_PCI-disabled",
+                 ARG_CAPS_ARCH, "x86_64",
+                 ARG_CAPS_VER, "latest",
+                 ARG_QEMU_CAPS_DEL, QEMU_CAPS_VIRTIO_GPU_GL_PCI, QEMU_CAPS_LAST,
+                 ARG_END);
     DO_TEST_CAPS_LATEST("video-virtio-edid-none");
     DO_TEST_CAPS_LATEST("video-virtio-edid-off");
     DO_TEST_CAPS_LATEST("video-virtio-edid-on");
-- 
2.55.0