[vfio-users] VM not booting/no video output when PCI passthrough GPU is added
Roel Van Gorp
roelvangorp at gmail.com
Wed Dec 16 18:06:04 UTC 2015
Ok, I'ḿ stupid. Turns out that besides my monitor I still had my TV
connected to the guest GPU, which caused the VM to not output anything to
my monitor. Disconnected the TV it worked like a charm. Still, thanks for
the help, very much appreciated!
2015-12-16 18:49 GMT+01:00 Roel Van Gorp <roelvangorp at gmail.com>:
> Still no luck... Tried it with kernel 4.1.6-201.fc22 and 4.1.13-100.fc21,
> but both gave the same result as 4.2.6.
>
> Any other ideas?
>
> 2015-12-15 23:26 GMT+01:00 A de Beus <anthony.debeus at gmail.com>:
>
>> I believe kernel 4.2.6 is broken. Use the linux-lts kernel which I think
>> is still 4.1.6.
>>
>> On Dec 15, 2015, at 3:18 PM, Roel Van Gorp <roelvangorp at gmail.com> wrote:
>>
>> Hi guys,
>>
>> After successfully setting up a W10 VM while passing through my GTX 980ti
>> on my old Arch linux install, I now have some difficulties setting it up on
>> a new Fedora installation using the exact same hardware configuration.
>>
>> I'm using a fresh Fedora 23 installation, kernel 4.2.6-301, the
>> virt-preview repo for the latest virtualization packages and the firmware
>> repo at https://www.kraxel.org/repos/firmware.repo for the latest OVFM
>> firmware.
>>
>> I mostly based myself on Alex Williamson's blog to set this up, resulting
>> in the following changes in the following files:
>>
>> */etc/sysconfig/grub:*
>>
>> GRUB_CMDLINE_LINUX="rd.lvm.lv=fedora/root rd.lvm.lv=fedora/swap rhgb
>> quiet intel_iommu=on rd.driver.pre=vfio-pci"
>>
>> */etc/modprobe.d/local.conf *
>>
>> options vfio-pci ids=10de:17c8,10de:0fb0
>> options vfio-pci disable_vga=1
>>
>> */etc/dracut.conf.d/local.conf*
>>
>> add_drivers+="vfio vfio_iommu_type1 vfio_pci vfio_virqfd"
>>
>>
>> This seems to have successfully enabled the vfio-pci driver, as shown by
>> the output of lspci -nnk:
>>
>> 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM200
>> [GeForce GTX 980 Ti] [10de:17c8] (rev a1)
>> Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3232]
>> Kernel driver in use: vfio-pci
>> Kernel modules: nouveau
>> 01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:0fb0] (rev
>> a1)
>> Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3232]
>> Kernel driver in use: vfio-pci
>> Kernel modules: snd_hda_intel
>>
>> *The VM:*
>>
>> Now I first set up the VM without PCI passthrough using virt-manager and
>> everything worked as expected using a virtual display, allowing me to fully
>> install Windows 10 Pro. The problems started when removing the virtual
>> display and adding the PCI devices for the GTX 980 ti. There is no video
>> output, and looking at the CPU monitor in virt-manager there is a short CPU
>> spike after which it seems hangs at around 1-2%. Reattaching the virtual
>> display again shows the bios splash screen normally as expected, after
>> which it goes to black with just the small white prompt dash. Removing the
>> PCI devices from the configuration again allow the VM to boot normally
>> again. Here is the xml config for the VM:
>>
>> <domain type='kvm'>
>> <name>win10</name>
>> <uuid>527f731e-0d9e-460a-a1ef-7a010e191c34</uuid>
>> <memory unit='KiB'>2560000</memory>
>> <currentMemory unit='KiB'>2560000</currentMemory>
>> <vcpu placement='static'>2</vcpu>
>> <os>
>> <type arch='x86_64' machine='pc-i440fx-2.4'>hvm</type>
>> <loader readonly='yes'
>> type='pflash'>/usr/share/edk2.git/ovmf-x64/OVMF_CODE-pure-efi.fd</loader>
>> <nvram>/var/lib/libvirt/qemu/nvram/win10_VARS.fd</nvram>
>> <boot dev='hd'/>
>> </os>
>> <features>
>> <acpi/>
>> <apic/>
>> <pae/>
>> <hyperv>
>> <relaxed state='on'/>
>> <vapic state='on'/>
>> <spinlocks state='on' retries='8191'/>
>> </hyperv>
>> <vmport state='off'/>
>> </features>
>> <cpu mode='host-passthrough'>
>> <topology sockets='1' cores='2' threads='1'/>
>> </cpu>
>> <clock offset='localtime'>
>> <timer name='rtc' tickpolicy='catchup'/>
>> <timer name='pit' tickpolicy='delay'/>
>> <timer name='hpet' present='no'/>
>> <timer name='hypervclock' present='yes'/>
>> </clock>
>> <on_poweroff>destroy</on_poweroff>
>> <on_reboot>restart</on_reboot>
>> <on_crash>restart</on_crash>
>> <pm>
>> <suspend-to-mem enabled='no'/>
>> <suspend-to-disk enabled='no'/>
>> </pm>
>> <devices>
>> <emulator>/usr/bin/qemu-kvm</emulator>
>> <disk type='file' device='disk'>
>> <driver name='qemu' type='qcow2'/>
>> <source file='/var/lib/libvirt/images/win10.qcow2'/>
>> <target dev='vda' bus='virtio'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
>> function='0x0'/>
>> </disk>
>> <controller type='usb' index='0' model='ich9-ehci1'>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>> function='0x7'/>
>> </controller>
>> <controller type='usb' index='0' model='ich9-uhci1'>
>> <master startport='0'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>> function='0x0' multifunction='on'/>
>> </controller>
>> <controller type='usb' index='0' model='ich9-uhci2'>
>> <master startport='2'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>> function='0x1'/>
>> </controller>
>> <controller type='usb' index='0' model='ich9-uhci3'>
>> <master startport='4'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>> function='0x2'/>
>> </controller>
>> <controller type='pci' index='0' model='pci-root'/>
>> <interface type='network'>
>> <mac address='52:54:00:21:17:b8'/>
>> <source network='default'/>
>> <model type='rtl8139'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
>> function='0x0'/>
>> </interface>
>> <hostdev mode='subsystem' type='pci' managed='yes'>
>> <source>
>> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
>> </source>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
>> function='0x0'/>
>> </hostdev>
>> <hostdev mode='subsystem' type='pci' managed='yes'>
>> <source>
>> <address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
>> </source>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
>> function='0x0'/>
>> </hostdev>
>> <memballoon model='virtio'>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x08'
>> function='0x0'/>
>> </memballoon>
>> </devices>
>> </domain>
>>
>>
>> Any help would be greatly appreciated!
>>
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>>
>
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