Let's say I have libvirt
[root@vmhost2 ~]# virsh version
Compiled against library: libvirt 4.5.0
Using library: libvirt 4.5.0
Using API: QEMU 4.5.0
Running hypervisor: QEMU 2.12.0
[root@vmhost2 ~]#
running on centos 8 and then I have this card
[root@vmhost2 ~]# virsh nodedev-dumpxml pci_0000_01_00_0
<device>
<name>pci_0000_01_00_0</name>
<path>/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0</path>
<parent>pci_0000_00_01_0</parent>
<driver>
<name>mlx4_core</name>
</driver>
<capability type='pci'>
<domain>0</domain>
<bus>1</bus>
<slot>0</slot>
<function>0</function>
<product id='0x1003'>MT27500 Family [ConnectX-3]</product>
<vendor id='0x15b3'>Mellanox Technologies</vendor>
<iommuGroup number='1'>
<address domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</iommuGroup>
<pci-express>
<link validity='cap' port='8' speed='8' width='8'/>
<link validity='sta' speed='5' width='8'/>
</pci-express>
</capability>
</device>
which I added to the guest (arch='x86_64' machine='pc-q35-rhel7.6.0') as
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</source>
<address type='pci' domain='0x0000' bus='0x08' slot='0x00'
function='0x0'/>
</hostdev>
When I try to start the guest I get the following error message:
[root@vmhost2 ~]# virsh start testfedora
error: Failed to start domain testfedora
error: internal error: qemu unexpectedly closed the monitor:
2020-04-24T20:01:35.341020Z qemu-kvm: -device
vfio-pci,host=01:00.0,id=hostdev0,bus=pci.8,addr=0x0: vfio error:
0000:01:00.0: failed to setup INTx fd: Operation not permitted
[root@vmhost2 ~]#
Why is it telling me that is not permitted?
