[libvirt] [RFC PATCH 5/7] qemu: caps: Add vfio-pci.display capability

[Erik Skultety]

QEMU 2.12 introduced a new vfio-pci device option 'display=on/off/auto'.
Initially, libvirt is only going to support values on/off only, as we
don't want to predict what the intended usage of the mediated device
will be and most importantly, what kind of vfio display implementation
to use - dmabuf vs vfio region mapping as there's no convenient way for
us to find out what implementation the device's underlying driver
supports.

Signed-off-by: Erik Skultety <eskultet at redhat.com>
---
 src/qemu/qemu_capabilities.c                       | 2 ++
 src/qemu/qemu_capabilities.h                       | 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 +
 6 files changed, 7 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index e2e76e4dd8..7c08991103 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -493,6 +493,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
 
               /* 305 */
               "vhost-vsock",
+              "vfio-pci.display",
     );
 
 
@@ -1179,6 +1180,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsPCIAssign[] = {
 
 static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVfioPCI[] = {
     { "bootindex", QEMU_CAPS_VFIO_PCI_BOOTINDEX },
+    { "display", QEMU_CAPS_VFIO_PCI_DISPLAY },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsSCSIDisk[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index f2aecefb9b..07cbe58789 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -477,6 +477,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
 
     /* 305 */
     QEMU_CAPS_DEVICE_VHOST_VSOCK, /* -device vhost-vsock-* */
+    QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
index f511bcb58c..3dba3e3b27 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
@@ -167,6 +167,7 @@
   <flag name='hda-output'/>
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
+  <flag name='vfio-pci.display'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>343099</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
index 37813ad0b1..13634db45f 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
@@ -164,6 +164,7 @@
   <flag name='hda-output'/>
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
+  <flag name='vfio-pci.display'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>419968</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
index 3191e9ba95..5ff96afc86 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
@@ -131,6 +131,7 @@
   <flag name='screendump_device'/>
   <flag name='blockdev-del'/>
   <flag name='vhost-vsock'/>
+  <flag name='vfio-pci.display'/>
   <version>2012000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>371055</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index 964b9e8fa6..5aa6b2bc3d 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -206,6 +206,7 @@
   <flag name='blockdev-del'/>
   <flag name='vmgenid'/>
   <flag name='vhost-vsock'/>
+  <flag name='vfio-pci.display'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>390813</microcodeVersion>
-- 
2.14.3