qemu: caps: Introduce QEMU_EGL_HEADLESS_RENDERNODE capability

Now that we have QAPI introspection of display types in QEMU upstream,
we can check whether the 'rendernode' option is supported with
egl-headless display type.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/qemu/qemu_capabilities.c

@@ -516,6 +516,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               "memory-backend-memfd.hugetlb",
               "iothread.poll-max-ns",
               "machine.pseries.cap-nested-hv",
+              "egl-headless.rendernode"
     );
 
 
@@ -1249,6 +1250,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsQMPSchemaQueries[] = {
     { "screendump/arg-type/device", QEMU_CAPS_SCREENDUMP_DEVICE },
     { "block-commit/arg-type/*top",  QEMU_CAPS_ACTIVE_COMMIT },
     { "query-iothreads/ret-type/poll-max-ns", QEMU_CAPS_IOTHREAD_POLLING },
+    { "query-display-options/ret-type/+egl-headless/rendernode", QEMU_CAPS_EGL_HEADLESS_RENDERNODE },
 };
 
 typedef struct _virQEMUCapsObjectTypeProps virQEMUCapsObjectTypeProps;

src/qemu/qemu_capabilities.h

@@ -500,6 +500,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     QEMU_CAPS_OBJECT_MEMORY_MEMFD_HUGETLB, /* -object memory-backend-memfd.hugetlb */
     QEMU_CAPS_IOTHREAD_POLLING, /* -object iothread.poll-max-ns */
     QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV, /* -machine pseries.cap-nested-hv */
+    QEMU_CAPS_EGL_HEADLESS_RENDERNODE, /* -display egl-headless,rendernode= */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;

tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml

@@ -208,6 +208,7 @@
   <flag name='memory-backend-memfd'/>
   <flag name='memory-backend-memfd.hugetlb'/>
   <flag name='iothread.poll-max-ns'/>
+  <flag name='egl-headless.rendernode'/>
   <version>3000092</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>440395</microcodeVersion>