qemu: enable virglrenderer and glx options subject to 'opengl' DISTRO_FEATURE

Note that to actually use accelerated GL passthrough, there are two options

1) a suitable frontend need to be also enabled - gtk+ and SDL both seem to work well.
Previously I struggled to make SDL work, but now it seems fine.

2) it is also possible to render off-screen with -display egl-headless option,
and see the output with a VNC viewer (for which, qemu needs to be started
with a VNC server):

$ runqemu kvm egl-headless publicvnc

(From OE-Core rev: 662c688e635f4490aac0d6d34ce7a7b31d73f5c5)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/runtime_test.py

@@ -188,18 +188,14 @@ class TestImage(OESelftestTestCase):
             self.skipTest('virgl isn\'t working with Opensuse 15.0')
 
         qemu_packageconfig = get_bb_var('PACKAGECONFIG', 'qemu-system-native')
-        sdl_packageconfig = get_bb_var('PACKAGECONFIG', 'libsdl2-native')
+        qemu_distrofeatures = get_bb_var('DISTRO_FEATURES', 'qemu-system-native')
         features = 'INHERIT += "testimage"\n'
         if 'gtk+' not in qemu_packageconfig:
             features += 'PACKAGECONFIG_append_pn-qemu-system-native = " gtk+"\n'
         if 'sdl' not in qemu_packageconfig:
             features += 'PACKAGECONFIG_append_pn-qemu-system-native = " sdl"\n'
-        if 'virglrenderer' not in qemu_packageconfig:
-            features += 'PACKAGECONFIG_append_pn-qemu-system-native = " virglrenderer"\n'
-        if 'glx' not in qemu_packageconfig:
-            features += 'PACKAGECONFIG_append_pn-qemu-system-native = " glx"\n'
-        if 'opengl' not in sdl_packageconfig:
-            features += 'PACKAGECONFIG_append_pn-libsdl2-native = " opengl"\n'
+        if 'opengl' not in qemu_distrofeatures:
+            features += 'DISTRO_FEATURES_append = " opengl"\n'
         features += 'TEST_SUITES = "ping ssh virgl"\n'
         features += 'IMAGE_FEATURES_append = " ssh-server-dropbear"\n'
         features += 'IMAGE_INSTALL_append = " kmscube"\n'
@@ -231,12 +227,10 @@ class TestImage(OESelftestTestCase):
             dripath = subprocess.check_output("pkg-config --variable=dridriverdir dri", shell=True)
         except subprocess.CalledProcessError as e:
             self.skipTest("Could not determine the path to dri drivers on the host via pkg-config.\nPlease install Mesa development files (particularly, dri.pc) on the host machine.")
-        qemu_packageconfig = get_bb_var('PACKAGECONFIG', 'qemu-system-native')
+        qemu_distrofeatures = get_bb_var('DISTRO_FEATURES', 'qemu-system-native')
         features = 'INHERIT += "testimage"\n'
-        if 'virglrenderer' not in qemu_packageconfig:
-            features += 'PACKAGECONFIG_append_pn-qemu-system-native = " virglrenderer"\n'
-        if 'glx' not in qemu_packageconfig:
-            features += 'PACKAGECONFIG_append_pn-qemu-system-native = " glx"\n'
+        if 'opengl' not in qemu_distrofeatures:
+            features += 'DISTRO_FEATURES_append = " opengl"\n'
         features += 'TEST_SUITES = "ping ssh virgl"\n'
         features += 'IMAGE_FEATURES_append = " ssh-server-dropbear"\n'
         features += 'IMAGE_INSTALL_append = " kmscube"\n'

meta/recipes-devtools/qemu/qemu-system-native_4.2.0.bb

@@ -9,7 +9,9 @@ DEPENDS = "glib-2.0-native zlib-native pixman-native qemu-native bison-native"
 
 EXTRA_OECONF_append = " --target-list=${@get_qemu_system_target_list(d)}"
 
-PACKAGECONFIG ??= "fdt alsa kvm"
+PACKAGECONFIG ??= "fdt alsa kvm \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'virglrenderer glx', '' ,d)} \
+"
 
 # Handle distros such as CentOS 5 32-bit that do not have kvm support
 PACKAGECONFIG_remove = "${@'kvm' if not os.path.exists('/usr/include/linux/kvm.h') else ''}"

meta/recipes-devtools/qemu/qemu_4.2.0.bb

@@ -21,5 +21,8 @@ do_install_append_class-nativesdk() {
 PACKAGECONFIG ??= " \
     fdt sdl kvm \
     ${@bb.utils.filter('DISTRO_FEATURES', 'alsa xen', d)} \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'virglrenderer glx', '' ,d)} \
+"
+PACKAGECONFIG_class-nativesdk ??= "fdt sdl kvm \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'virglrenderer glx', '' ,d)} \
 "
-PACKAGECONFIG_class-nativesdk ??= "fdt sdl kvm"