[libvirt] [PATCH v2 1/7] qemu: caps: Introduce a capability for egl-headless

Erik Skultety eskultet at redhat.com
Mon Jul 9 16:24:13 UTC 2018 

Since QEMU 2.10, it's possible to use a new type of display -
egl-headless which uses drm nodes to provide OpenGL support. This patch
adds a capability for that. However, since QEMU doesn't provide a QMP
command to probe it, this is only a libvirt version-based capability.

Signed-off-by: Erik Skultety <eskultet at redhat.com>
---
 src/qemu/qemu_capabilities.c                       | 6 ++++++
 src/qemu/qemu_capabilities.h                       | 1 +
 tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml | 1 +
 tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml  | 1 +
 tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml  | 1 +
 tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml    | 1 +
 12 files changed, 17 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index c7da916f9a..8e23b78ba4 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -502,6 +502,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               "sev-guest",
               "machine.pseries.cap-hpt-max-page-size",
               "machine.pseries.cap-htm",
+              "egl-headless",
     );
 
 
@@ -4028,6 +4029,11 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
         virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT);
     }
 
+    /* '-display egl-headless' cmdline option is supported since QEMU 2.10, but
+     * there's no way to probe it */
+    if (qemuCaps->version >= 2010000)
+        virQEMUCapsSet(qemuCaps, QEMU_CAPS_EGL_HEADLESS);
+
     /* no way to query for -numa dist */
     if (qemuCaps->version >= 2010000)
         virQEMUCapsSet(qemuCaps, QEMU_CAPS_NUMA_DIST);
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index a048a1cf02..bb3594c172 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -486,6 +486,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     QEMU_CAPS_SEV_GUEST, /* -object sev-guest,... */
     QEMU_CAPS_MACHINE_PSERIES_CAP_HPT_MAX_PAGE_SIZE, /* -machine pseries.cap-hpt-max-page-size */
     QEMU_CAPS_MACHINE_PSERIES_CAP_HTM, /* -machine pseries.cap-htm */
+    QEMU_CAPS_EGL_HEADLESS, /* -display egl-headless */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
index 169641063c..a70e050765 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
@@ -159,6 +159,7 @@
   <flag name='hda-output'/>
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
+  <flag name='egl-headless'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>307647</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
index 92c095abd2..72709905d8 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
@@ -158,6 +158,7 @@
   <flag name='hda-output'/>
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
+  <flag name='egl-headless'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>386992</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
index 5e22e21224..7347f5683f 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
@@ -119,6 +119,7 @@
   <flag name='sdl-gl'/>
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
+  <flag name='egl-headless'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>307899</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
index 10b066bff1..d69a148cd2 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
@@ -203,6 +203,7 @@
   <flag name='vmgenid'/>
   <flag name='vhost-vsock'/>
   <flag name='mch'/>
+  <flag name='egl-headless'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>367995</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
index 6ca2e57ef8..b359f9a049 100644
--- a/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
@@ -126,6 +126,7 @@
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
   <flag name='tpm-emulator'/>
+  <flag name='egl-headless'/>
   <version>2011000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>346751</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
index ecc029f403..80e7afec04 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
@@ -169,6 +169,7 @@
   <flag name='vhost-vsock'/>
   <flag name='chardev-fd-pass'/>
   <flag name='tpm-emulator'/>
+  <flag name='egl-headless'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>347550</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
index 7139179304..c4b09c0003 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
@@ -167,6 +167,7 @@
   <flag name='chardev-fd-pass'/>
   <flag name='tpm-emulator'/>
   <flag name='machine.pseries.cap-htm'/>
+  <flag name='egl-headless'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>428334</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
index 87d189e58d..1ff2fe45e1 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
@@ -133,6 +133,7 @@
   <flag name='vhost-vsock'/>
   <flag name='chardev-fd-pass'/>
   <flag name='tpm-emulator'/>
+  <flag name='egl-headless'/>
   <version>2012000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>375999</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index 9c1f6c327c..37d17786cf 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -211,6 +211,7 @@
   <flag name='mch'/>
   <flag name='mch.extended-tseg-mbytes'/>
   <flag name='sev-guest'/>
+  <flag name='egl-headless'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>416196</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
index 33cd00e613..57bf5dba11 100644
--- a/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
@@ -167,6 +167,7 @@
   <flag name='tpm-emulator'/>
   <flag name='machine.pseries.cap-hpt-max-page-size'/>
   <flag name='machine.pseries.cap-htm'/>
+  <flag name='egl-headless'/>
   <version>2012050</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>446771</microcodeVersion>
-- 
2.14.4

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