KVM, PCI passthrough and SR-IOV

[mijanek]

the latest three readlink return an empty reply because the link does not exists at all and this explains the "Cannot open iommu_group: No such file or directory" I got when trying to start a VM with a VF connected.

I was dealing with similar problem like you and today I found the solution for me... maybe it will help you too.

set the rights for the device path

chmod 666 /dev/vfio/*

after that the VM is starting using virtio-pci on pve-kernel-3.10.0-3-pve: 3.10.0-13

machine: q35
hostpci0: 02:00.0,pcie=1,driver=vfio

(I have added also the PCI STUB to the grub command line /etc/default/grub )

GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on,igfx_off,pass-through pci-stub.ids=dd01:0003"

 

[Kernel75]

I was dealing with similar problem like you and today I found the solution for me... maybe it will help you too.

Ciao, mijanek

I tried with your suggestion but it did not work for me.
Testing on CentOS is taking a bit longer: CentOS 6.5 is still using 2.6.x kernels and I've just downloaded CentOS 7 ISO and I'm doing the installation now.

I really want to try with Mellanox OFED package before cross posting on Mellanox community forum.

Thanks,
Roberto