Code 12 GPU Passthrough

[Abelard]

1. Config file for the VM on ProxMox is the following:
   

   args: -cpu host,kvm=off
   machine: q35
   bootdisk: ide0
   cores: 1
   cpu: host
   ide0: local-lvm:vm-100-disk-1,size=25G
   ide2: local:iso/win7x64.iso,media=cdrom
   memory: 2048
   name: win7
   net0: e1000=C6:42:2D:23:A4:AF,bridge=vmbr0
   numa: 0
   ostype: win7
   scsihw: virtio-scsi-pci
   smbios1: uuid=6461691a-4bba-4d6c-8ed5-9560c131939c
   sockets: 2
   hostpci0: 00:02,pcie=1,x-vga=on
   vga: none

2. IOMMU is working:
   

   root@pve:~# dmesg | grep -e IOMMU
   [    0.000000] Warning: PCIe ACS overrides enabled; This may allow non-IOMMU protected peer-to-peer DMA
   [    0.000000] DMAR: IOMMU enabled
   [    0.065200] DMAR-IR: IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 1
   root@pve:~# find /sys/kernel/iommu_groups/ -type l
   /sys/kernel/iommu_groups/5/devices/0000:00:1c.0
   /sys/kernel/iommu_groups/5/devices/0000:01:00.0
   /sys/kernel/iommu_groups/3/devices/0000:00:16.0
   /sys/kernel/iommu_groups/1/devices/0000:00:02.0
   /sys/kernel/iommu_groups/6/devices/0000:00:1f.3
   /sys/kernel/iommu_groups/6/devices/0000:00:1f.4
   /sys/kernel/iommu_groups/6/devices/0000:00:1f.2
   /sys/kernel/iommu_groups/6/devices/0000:00:1f.0
   /sys/kernel/iommu_groups/4/devices/0000:00:17.0
   /sys/kernel/iommu_groups/2/devices/0000:00:14.2
   /sys/kernel/iommu_groups/2/devices/0000:00:14.0
   /sys/kernel/iommu_groups/0/devices/0000:00:00.0

   
   
3. The vfio-pci driver is being used correctly:
   

   root@pve:~# lspci -k
   00:02.0 VGA compatible controller: Intel Corporation Device 5906 (rev 02)
       Subsystem: Intel Corporation Device 2212
       Kernel driver in use: vfio-pci
       Kernel modules: i915

   
   
4. Other relevant information:
   

   root@pve:~# pveversion -v
   proxmox-ve: 5.1-32 (running kernel: 4.13.13-2-pve)
   pve-manager: 5.1-41 (running version: 5.1-41/0b958203)
   pve-kernel-4.13.13-2-pve: 4.13.13-32
   libpve-http-server-perl: 2.0-8
   lvm2: 2.02.168-pve6
   corosync: 2.4.2-pve3
   libqb0: 1.0.1-1
   pve-cluster: 5.0-19
   qemu-server: 5.0-18
   pve-firmware: 2.0-3
   libpve-common-perl: 5.0-25
   libpve-guest-common-perl: 2.0-14
   libpve-access-control: 5.0-7
   libpve-storage-perl: 5.0-17
   pve-libspice-server1: 0.12.8-3
   vncterm: 1.5-3
   pve-docs: 5.1-12
   pve-qemu-kvm: 2.9.1-5
   pve-container: 2.0-18
   pve-firewall: 3.0-5
   pve-ha-manager: 2.0-4
   ksm-control-daemon: 1.2-2
   glusterfs-client: 3.8.8-1
   lxc-pve: 2.1.1-2
   lxcfs: 2.0.8-1
   criu: 2.11.1-1~bpo90
   novnc-pve: 0.6-4
   smartmontools: 6.5+svn4324-1
   zfsutils-linux: 0.7.3-pve1~bpo9

   
   
5. kernel settings:
   

   quiet intel_iommu=on pcie_acs_override=downstream video=efifb:off

6. /etc/modules:
   

   vfio
   vfio_iommu_type1
   vfio_pci
   vfio_virqfd
   pci_stub

 

[wolfgang]

Hi,

args: -cpu host,kvm=off

You need kvm for passthrough.
Why do you turn it off?