Re: [libvirt] [PATCH v2 2/7] conf: Introduce a new graphics display type 'headless'

Since 2.10 QEMU supports a new display type egl-headless which uses the drm nodes for OpenGL rendering copying back the rendered bits back to QEMU into a dma-buf which can be accessed by standard "display" apps like VNC or SPICE. Although this display type can be used on its own, for any practical use case it makes sense to pair it with either VNC or SPICE display. The clear benefit of this display is that VNC gains OpenGL support, which it natively doesn't have, and SPICE gains remote OpenGL support (native OpenGL support only works locally through a UNIX socket, i.e. listen type=socket/none) Signed-off-by: Erik Skultety <eskultet(a)redhat.com&gt; --- docs/formatdomain.html.in | 33 ++++++++++++- docs/schemas/domaincommon.rng | 3 ++ src/conf/domain_conf.c | 6 ++- src/conf/domain_conf.h | 1 + src/libxl/libxl_conf.c | 1 + src/qemu/qemu_command.c | 35 +++++++++++++- src/qemu/qemu_domain.c | 54 ++++++++++++++++++++++ src/qemu/qemu_driver.c | 2 + src/qemu/qemu_hotplug.c | 1 + src/qemu/qemu_process.c | 4 ++ src/vmx/vmx.c | 1 + tests/domaincapsschemadata/full.xml | 1 + tests/qemuxml2argvdata/graphics-egl-headless.args | 26 +++++++++++ tests/qemuxml2argvdata/graphics-egl-headless.xml | 31 +++++++++++++ .../qemuxml2argvdata/graphics-sdl-egl-headless.xml | 35 ++++++++++++++ .../graphics-spice-egl-headless.args | 31 +++++++++++++ .../graphics-spice-egl-headless.xml | 36 +++++++++++++++ .../graphics-spice-invalid-egl-headless.xml | 37 +++++++++++++++ .../graphics-vnc-egl-headless.args | 28 +++++++++++ .../qemuxml2argvdata/graphics-vnc-egl-headless.xml | 37 +++++++++++++++ tests/qemuxml2argvtest.c | 17 +++++++ .../graphics-spice-egl-headless.xml | 44 ++++++++++++++++++ .../graphics-vnc-egl-headless.xml | 42 +++++++++++++++++ tests/qemuxml2xmltest.c | 2 + 24 files changed, 504 insertions(+), 4 deletions(-) create mode 100644 tests/qemuxml2argvdata/graphics-egl-headless.args create mode 100644 tests/qemuxml2argvdata/graphics-egl-headless.xml create mode 100644 tests/qemuxml2argvdata/graphics-sdl-egl-headless.xml create mode 100644 tests/qemuxml2argvdata/graphics-spice-egl-headless.args create mode 100644 tests/qemuxml2argvdata/graphics-spice-egl-headless.xml create mode 100644 tests/qemuxml2argvdata/graphics-spice-invalid-egl-headless.xml create mode 100644 tests/qemuxml2argvdata/graphics-vnc-egl-headless.args create mode 100644 tests/qemuxml2argvdata/graphics-vnc-egl-headless.xml create mode 100644 tests/qemuxml2xmloutdata/graphics-spice-egl-headless.xml create mode 100644 tests/qemuxml2xmloutdata/graphics-vnc-egl-headless.xml

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index b10bbc40a4..f488050bf8 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3695,6 +3695,57 @@ qemuDomainDefPostParseBasic(virDomainDefPtr def, } +static int +qemuDomainDefGraphicsPostParse(virDomainDefPtr def) +{ + virDomainGraphicsDefPtr graphics = NULL; + bool have_egl_headless = false; + size_t i; + + /* are we running with egl-headless? */ + for (i = 0; i < def->ngraphics; i++) { + graphics = def->graphics[i]; + + if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_EGL_HEADLESS) { + have_egl_headless = true; + break; + } + } + + /* Only VNC and SPICE can be paired with egl-headless, the other types + * either don't make sense to pair with egl-headless or aren't even + * supported by QEMU. + */ + if (have_egl_headless) { + for (i = 0; i < def->ngraphics; i++) { + graphics = def->graphics[i]; + + if (graphics->type != VIR_DOMAIN_GRAPHICS_TYPE_EGL_HEADLESS && + graphics->type != VIR_DOMAIN_GRAPHICS_TYPE_VNC && + graphics->type != VIR_DOMAIN_GRAPHICS_TYPE_SPICE) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("graphics type 'egl-headless' is only supported " + "with one of: 'vnc', 'spice' graphics types")); + return -1; + } + + /* '-spice gl=on' and '-display egl-headless' are mutually + * exclusive + */ + if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_SPICE && + graphics->data.spice.gl == VIR_TRISTATE_BOOL_YES) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("multiple OpenGL displays are not supported " + "by QEMU")); + return -1; + } + } + } + + return 0; +} +