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Message-ID: <20171116093338.xu65cdzotyuup7pi@sirius.home.kraxel.org>
Date: Thu, 16 Nov 2017 10:33:38 +0100
From: Gerd Hoffmann <kraxel@...hat.com>
To: Alex Williamson <alex.williamson@...hat.com>
Cc: Tina Zhang <tina.zhang@...el.com>, chris@...is-wilson.co.uk,
joonas.lahtinen@...ux.intel.com, zhenyuw@...ux.intel.com,
zhiyuan.lv@...el.com, zhi.a.wang@...el.com, kevin.tian@...el.com,
daniel@...ll.ch, kwankhede@...dia.com, hang.yuan@...el.com,
intel-gfx@...ts.freedesktop.org,
intel-gvt-dev@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v18 0/6] drm/i915/gvt: Dma-buf support for GVT-g
> > > This patch set can be tried with the following example:
> > > git://git.kraxel.org/qemu branch: work/intel-vgpu
> > >
> >
> > Tested-by: Gerd Hoffmann <kraxel@...hat.com>
>
> Hi Gerd,
>
> Can you share the xml snippets required for the VM to make this work?
> Last I tried I couldn't get the display/video/hostdev configuration to
> get any enhanced behavior through the dmabuf. Thanks,
qemu built from the branch listed above.
Testing with a shell script right now, see below. First argument is the
mode. "vgpu-gtk" works fine. "vgpu-spice-remote" works too, even
remotely, but it's not very efficient (grabs display data via opengl
ReadPixels, then sends it over classic spice protocol).
For the latter I have a libvirt snippet too, which has to jump through a
few loops due to libvirt not having support for vgou display yet, with
the most annonying issue being that libvirt insists adding a emulated
vga to the guest if you configure spice.
HTH,
Gerd
====================== cut here ====================
#!/bin/sh
# args
mode="${1-vga}"; shift
# config
vers="26"
live="$(ls -t $HOME/iso/Fedora*Live*${vers}*.iso | head -1)"
name="$(basename $live)"
qemu="/usr/local/bin/qemu-system-x86_64"
uuid="aca92d96-6654-43d9-8f45-544c19e89f20"
path="/sys/bus/mdev/devices/${uuid}"
###########################################################################
# tweaks
case "$mode" in
vga)
args="-vga std"
;;
virtio)
args="-vga virtio"
;;
virtio-gl)
args=""
args="$args -vga virtio"
args="$args -display gtk,gl=on"
;;
vgpu-gtk)
args=""
args="$args -vga none"
args="$args -display gtk,gl=on"
args="$args -device vfio-pci,sysfsdev=${path},addr=0x5,x-display=on"
qemu="sudo $qemu"
;;
vgpu-sdl)
# intel sdl 1.2 patches ...
args=""
args="$args -vga none"
args="$args -display sdl"
args="$args -device vfio-pci,sysfsdev=${path},addr=0x5"
qemu="sudo $qemu"
;;
vgpu-spice-local)
# using spice, passing around dma-bufs
# FIXME: launch remote-viewer on unix socket
args=""
args="$args -vga none"
args="$args -spice disable-ticketing,gl=on,unix,addr=/tmp/spice-vgpu"
args="$args -device vfio-pci,sysfsdev=${path},addr=0x5,x-display=on"
qemu="sudo $qemu"
;;
vgpu-spice-remote)
# using spice, readpixels dmabuf,
# send traditional spice display updates
(sleep 1; remote-viewer spice://localhost:5909) &
args=""
args="$args -vga none"
args="$args -display egl-headless"
args="$args -spice disable-ticketing,gl=off,port=5909"
args="$args -device vfio-pci,sysfsdev=${path},addr=0x5,x-display=on"
qemu="sudo $qemu"
;;
*)
echo "unknown mode: $mode"
echo "valid modes:"
echo " vga virtio virtio-gl vgpu-gtk vgpu-sdl"
echo " vgpu-spice-local vgpu-spice-remote"
exit 1
;;
esac
###########################################################################
# go!
set -ex
exec $qemu -enable-kvm -name "$name" \
-boot menu=on -m 2G -usb \
-drive if=none,id=live,media=cdrom,file="$live" \
-netdev user,id=unet \
\
-device virtio-net-pci,addr=0x08,netdev=unet \
-device virtio-scsi-pci,addr=0x09 \
-device scsi-cd,drive=live,scsi-id=4,bootindex=1 \
-device usb-tablet \
\
$args "$@"
====================== cut here ====================
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>liveiso-vgpu-remote</name>
<uuid>a2fc1e5e-8370-44b2-a31f-140f441e0355</uuid>
<memory unit='KiB'>1048576</memory>
<currentMemory unit='KiB'>1048576</currentMemory>
<vcpu placement='static'>2</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-2.8'>hvm</type>
<bootmenu enable='yes'/>
<bios useserial='yes'/>
</os>
<features>
<acpi/>
<apic/>
<vmport state='off'/>
</features>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Broadwell</model>
</cpu>
<clock offset='utc'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/local/bin/qemu-system-x86_64</emulator>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw' cache='none' io='native'/>
<source file='/home/kraxel/iso/Fedora-Workstation-Live-x86_64-26-1.5.iso'/>
<target dev='sda' bus='scsi'/>
<readonly/>
<boot order='1'/>
<address type='drive' controller='0' bus='0' target='4' unit='0'/>
</disk>
<controller type='pci' index='0' model='pci-root'/>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</controller>
<controller type='usb' index='0' model='nec-xhci'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x14' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
</controller>
<interface type='network'>
<mac address='52:54:00:28:99:99'/>
<source network='bios'/>
<model type='virtio'/>
<boot order='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='unix'>
<target type='virtio' name='org.qemu.guest_agent.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'>
<address type='usb' bus='0' port='1'/>
</input>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='spice' autoport='yes'>
<listen type='address'/>
</graphics>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x19' function='0x0'/>
</sound>
<video>
<model type='cirrus' vram='16384' heads='1' primary='yes'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<hostdev mode='subsystem' type='mdev' managed='no' model='vfio-pci'>
<source>
<address uuid='aca92d96-6654-43d9-8f45-544c19e89f20'/>
</source>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</hostdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</memballoon>
</devices>
<qemu:commandline>
<qemu:arg value='-set'/>
<qemu:arg value='device.video0.driver=ne2k_pci'/>
<qemu:arg value='-set'/>
<qemu:arg value='device.hostdev0.x-display=yes'/>
<qemu:arg value='-display'/>
<qemu:arg value='egl-headless'/>
</qemu:commandline>
</domain>
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