Re: [libvirt] unsupported configuration: unknown video model 'virtio' - virtio-vga

On 29.07.2015 18:28, Daniel P. Berrange wrote: Daniel, exactly! Martin, indeed, it makes sense, let me show ... virtio-gpu: mask as -device VGA Newer libvirt versions start looking up VGA in the QOM tree. So tricking libvirt this way ... <qemu:arg value='-set'/> <qemu:arg value='device.video0.driver=virtio-vga'/> ... to test virtio-vga stopped working. Lets rename VGA to stdvga and virtio-vga to VGA to get things going again. A simple ... <model type='vga' vram='16384' heads='1'/> ... will give you virtio-vga when building qemu with this patch applied. --- hw/display/vga-pci.c | 2 +- hw/display/virtio-vga.c | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/display/vga-pci.c b/hw/display/vga-pci.c index 1dfa331..1a98148 100644 --- a/hw/display/vga-pci.c +++ b/hw/display/vga-pci.c @@ -363,7 +363,7 @@ static void secondary_class_init(ObjectClass *klass, void *data) } static const TypeInfo vga_info = { - .name = "VGA", + .name = "stdvga", .parent = TYPE_PCI_VGA, .instance_init = pci_std_vga_init, .class_init = vga_class_init, diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c index f7e539f..1260011 100644 --- a/hw/display/virtio-vga.c +++ b/hw/display/virtio-vga.c @@ -7,7 +7,7 @@ /* * virtio-vga: This extends VirtioPCIProxy. */ -#define TYPE_VIRTIO_VGA "virtio-vga" +#define TYPE_VIRTIO_VGA "VGA" #define VIRTIO_VGA(obj) \ OBJECT_CHECK(VirtIOVGA, (obj), TYPE_VIRTIO_VGA) @@ -15,6 +15,7 @@ typedef struct VirtIOVGA { VirtIOPCIProxy parent_obj; VirtIOGPU vdev; VGACommonState vga; + uint32_t dummy; MemoryRegion vga_mrs[3]; } VirtIOVGA; @@ -139,6 +140,7 @@ static void virtio_vga_reset(DeviceState *dev) static Property virtio_vga_properties[] = { DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy), + DEFINE_PROP_UINT32("vgamem_mb", VirtIOVGA, dummy, 16), DEFINE_PROP_END_OF_LIST(), }; Ref. https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg02917.html # grep vga /etc/libvirt/qemu/Rawhide.xml <model type='vga' vram='16384' heads='1'/> # lspci -d 1af4:1050 -knn 00:02.0 VGA compatible controller [0300]: Red Hat, Inc Device [1af4:1050] (rev 01) Subsystem: Red Hat, Inc Device [1af4:1100] Kernel driver in use: virtio-pci Kernel modules: virtio_pci # dmesg -t | egrep -i vga\|drm vgaarb: setting as boot device: PCI:0000:00:02.0 vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none vgaarb: loaded vgaarb: bridge control possible 0000:00:02.0 fb0: VESA VGA frame buffer device [drm] Initialized drm 1.1.0 20060810 [drm] pci: virtio-vga detected fb: switching to virtiodrmfb from VESA VGA [drm] virtio vbuffers: 80 bufs, 192B each, 15kB total. virtio_gpu virtio0: fb0: virtiodrmfb frame buffer device [drm] Initialized virtio_gpu 0.0.1 0 on minor 0 # grep modeset /var/log/Xorg.0.log | grep -v Modeline [ 110.191] (==) Matched modesetting as autoconfigured driver 0 [ 110.191] (II) LoadModule: "modesetting" [ 110.191] (II) Loading /usr/lib64/xorg/modules/drivers/modesetting_drv.so [ 110.191] (II) Module modesetting: vendor="X.Org Foundation" [ 110.192] (II) modesetting: Driver for Modesetting Kernel Drivers: kms [ 110.192] (II) modeset(0): using drv /dev/dri/card0 [ 110.192] (II) modeset(0): Creating default Display subsection in Screen section [ 110.192] (==) modeset(0): Depth 24, (==) framebuffer bpp 32 [ 110.192] (==) modeset(0): RGB weight 888 [ 110.192] (==) modeset(0): Default visual is TrueColor [ 110.212] (EE) modeset(0): glamor initialization failed [ 110.212] (II) modeset(0): ShadowFB: preferred NO, enabled NO [ 110.212] (II) modeset(0): Output Virtual-0 has no monitor section [ 110.212] (II) modeset(0): EDID for output Virtual-0 [ 110.212] (II) modeset(0): Printing probed modes for output Virtual-0 [ 110.212] (II) modeset(0): Output Virtual-0 connected [ 110.212] (II) modeset(0): Using exact sizes for initial modes [ 110.212] (II) modeset(0): Output Virtual-0 using initial mode 1904x889 +0+0 [ 110.212] (II) modeset(0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated. [ 110.212] (==) modeset(0): DPI set to (96, 96) [ 110.216] (==) modeset(0): Backing store enabled [ 110.216] (==) modeset(0): Silken mouse enabled [ 110.216] (II) modeset(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 110.216] (==) modeset(0): DPMS enabled [ 110.225] (II) modeset(0): Damage tracking initialized Beside mouse cursor icon change problem - retention, the only major inconvenience - dynamic guest resizing is broken, just as with qxl. With the bochs vga, resizing works OK per se, that is, without the need for additional "glue" in window manager. # lspci -d 1234:1111 -knn 00:02.0 VGA compatible controller [0300]: Device [1234:1111] (rev 02) Subsystem: Red Hat, Inc Device [1af4:1100] Kernel driver in use: bochs-drm Kernel modules: bochs_drm # grep stride /var/log/Xorg.0.log [ 27.333] (II) modeset(0): Allocate new frame buffer 1920x896 stride [ 467.368] (II) modeset(0): Allocate new frame buffer 1632x902 stride [ 471.363] (II) modeset(0): Allocate new frame buffer 1704x938 stride [ 535.373] (II) modeset(0): Allocate new frame buffer 952x710 stride [ 540.368] (II) modeset(0): Allocate new frame buffer 552x818 stride [ 546.380] (II) modeset(0): Allocate new frame buffer 952x455 stride [ 554.374] (II) modeset(0): Allocate new frame buffer 424x200 stride [ 561.360] (II) modeset(0): Allocate new frame buffer 424x402 stride [ 564.357] (II) modeset(0): Allocate new frame buffer 880x402 stride [ 573.376] (II) modeset(0): Allocate new frame buffer 424x240 stride [ 576.366] (II) modeset(0): Allocate new frame buffer 792x519 stride [ 582.361] (II) modeset(0): Allocate new frame buffer 1104x608 stride [ 593.379] (II) modeset(0): Allocate new frame buffer 424x608 stride [ 604.373] (II) modeset(0): Allocate new frame buffer 424x263 stride [ 613.359] (II) modeset(0): Allocate new frame buffer 424x615 stride [ 616.358] (II) modeset(0): Allocate new frame buffer 1016x784 stride [ 624.356] (II) modeset(0): Allocate new frame buffer 1536x850 stride [ 629.362] (II) modeset(0): Allocate new frame buffer 1904x938 stride [ 636.377] (II) modeset(0): Allocate new frame buffer 1920x896 stride # rpm -q qemu libvirt qemu-2.4.0-0.3.rc4.fc24.x86_64 libvirt-1.2.18-1.fc24.x86_64 The question was, when we will be able to use the Virtio GPU without patched QEMU.