PCI/GPU Passthrough with xen

[Christoph]

this config does not work... why?

<domain type='xen'>
   <name>marax.chao5.int</name>
   <uuid>72f8f7cf-d538-41cd-828a-9945b9157719</uuid>
   <memory unit='GiB'>32</memory>
   <currentMemory unit='GiB'>32</currentMemory>
   <vcpu placement='static'>16</vcpu>
   <os>
     <type arch='x86_64' machine='xenfv'>hvm</type>
     <loader type='rom'>/usr/lib/xen/boot/hvmloader</loader>
     <boot dev='hd'/>
   </os>
   <features>
     <acpi/>
     <apic/>
     <pae/>
   </features>
   <clock offset='localtime'/>
   <on_poweroff>destroy</on_poweroff>
   <on_reboot>restart</on_reboot>
   <on_crash>destroy</on_crash>
   <devices>
     <emulator>/usr/lib/xen/bin/qemu-system-i386</emulator>
     <disk type='block' device='disk'>
       <driver name='phy' type='raw'/>
       <source dev='/dev/mapper/marax_c'/>
       <target dev='hda' bus='ide'/>
       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
     </disk>
     <disk type='file' device='cdrom'>
       <driver type='raw'/>
       <target dev='hdb' bus='ide'/>
       <readonly/>
       <address type='drive' controller='0' bus='0' target='0' unit='1'/>
     </disk>
     <disk type='block' device='disk'>
       <driver name='phy' type='raw'/>
       <source dev='/dev/vg_lilith/lv_marax_d'/>
       <target dev='hdc' bus='ide'/>
       <address type='drive' controller='0' bus='1' target='0' unit='0'/>
     </disk>
     <controller type='ide' index='0'/>
     <interface type='bridge'>
       <mac address='00:16:3e:8c:97:27'/>
       <source bridge='xenbr5'/>
       <model type='e1000'/>
     </interface>
     <serial type='pty'>
       <target port='0'/>
     </serial>
     <console type='pty'>
       <target type='serial' port='0'/>
     </console>
     <input type='tablet' bus='usb'/>
     <input type='mouse' bus='ps2'/>
     <input type='keyboard' bus='ps2'/>
     <graphics type='vnc' port='5900' autoport='no' listen='0.0.0.0'
keymap='de'>
       <listen type='address' address='0.0.0.0'/>
     </graphics>
     <video>
       <model type='xen' vram='16384' heads='1' primary='yes'/>
     </video>
     <hostdev mode='subsystem' type='pci' managed='yes'>
       <driver name='xen'/>
       <source>
         <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
       </source>
     </hostdev>
     <hostdev mode='subsystem' type='pci' managed='yes'>
       <driver name='xen'/>
       <source>
         <address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
       </source>
     </hostdev>
     <hostdev mode='subsystem' type='pci' managed='yes'>
       <driver name='xen'/>
       <source>
         <address domain='0x0000' bus='0x01' slot='0x00' function='0x2'/>
       </source>
     </hostdev>
     <hostdev mode='subsystem' type='pci' managed='yes'>
       <driver name='xen'/>
       <source>
         <address domain='0x0000' bus='0x01' slot='0x00' function='0x3'/>
       </source>
     </hostdev>
     <memballoon model='xen'/>
   </devices>
</domain>


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Greetz

Am 31.01.2020 23:07, schrieb Jim Fehlig:
> On 1/30/20 1:24 AM, Christoph wrote:
>> Hi All,
>>
>> it is possible to use pci/gpu passthrough with xen and libvirt?
>> If yes, how is the syntax? Can I get an example?
>
> Yes, host PCI devices can be passed to xen guests using libvirt. Below
> is example config of a "managed" PCI host device. For more details see
> https://libvirt.org/formatdomain.html#elementsHostDevSubsys
>
>     <hostdev mode='subsystem' type='pci' managed='yes'>
>       <driver name='xen'/>
>       <source>
>         <address domain='0x0000' bus='0x0a' slot='0x10'
> function='0x1'/>
>       </source>
>     </hostdev>
>
> Regards,
> Jim