Hard to tell what the problem is at a glance, although I believe Quadro
cards are a special case because they are meant to be passed-through
like that, unlike Geforce cards where the hv_vendor spoofing is more of
a workaround to get the drivers to load even though the card being
detected isn't supposed to work in a virtual environnement.
Could you send us the output of those commands?
$ for iommu_group in $(find /sys/kernel/iommu_groups/ -maxdepth 1 -mindepth 1 -type d); do echo "IOMMU group
$(basename "$iommu_group")"; for device in $(ls -1 "$iommu_group"/devices/); do echo -n $'\t';
lspci -nns "$device"; done; done
$ lspci -s 02:00 -nnk
$ cat /proc/cmdline
$ find /sys/bus/pci/devices/*/boot_vga -print -exec cat {} \;
$ cat /etc/modprobe.d/vfio.cfg
Pretty sure that last one should be vfio.conf, BTW. The manpage for
modprobe.d says it only checks for files ending in .conf.
Also, looking at the comments in your script, you seem to have VFIO and
VGA arbitration (x-vga) mixed up. You can't use the two methods at the
same time, they're mutually exclusive.
On 2016-05-08 22:35, Daurnimator wrote:
Hi all,
I'm trying to get windows working inside QEMU on my laptop with
passthrough of my gfx card.
However, I seem to be running getting the infamous code 43 from the
nvidia driver.
Screenshot of device manager: https://i.imgur.com/YA2baaW.png
The solutions I've found online so far don't seem to help, so I'm
posting to this list.
The following is a well commented shell script of how I've progressed
so far (latest available at
https://gist.github.com/daurnimator/01ae36e54eeb46668696468f18c1bfef):
# About
## Hardware
### Dell Precision M3800 laptop
#### Quad-core processor. Supports VT-d
#### 16GB RAM
#### Intel onboard GFX
#### GPU: 02:00.0 3D controller [0302]: NVIDIA Corporation GK107GLM
[Quadro K1100M] [10de:0ff6]
## Kernel
### Linux 4.5.1-1-ARCH #1 SMP PREEMPT Thu Apr 14 19:19:32 CEST 2016
x86_64 GNU/Linux
# Setup
## Make sure Virtualisation is turned on in BIOS
## Turn on IOMMU
### Need to add relevant iommu option to your kernel command line
### e.g. in /etc/defaults/grub
### For intel processors, add `intel_iommu=on`
### This resulted in a heap of errors in my kernel log like:
### 'DMAR: DMAR:[DMA Read] Request device [00:02.0] fault addr 2927799'
### Fixed this by adding igfx_off. so a total of: `intel_iommu=on,igfx_off`
## Permissions
### add udev rule to tag vfio device with 'kvm' group
### add self to kvm group
### Related: http://www.evonide.com/non-root-gpu-passthrough-setup/
## I got error 'No available IOMMU models'. Had to run:
### Found fix via: https://bugs.launchpad.net/qemu/+bug/1529187
sudo modprobe vfio_iommu_type1
## I got error 'VFIO_MAP_DMA cannot allocate memory'
### need to increase locked memory ulimit
### https://bugzilla.redhat.com/show_bug.cgi?id=912277
### edited /etc/security/limits.conf, allowed 10GB (I guess it needs
to be more than GFX card RAM?):
### daurnimator hard memlock 10485760
ulimit -l 10485760
## I get error 'qemu-system-x86_64: vfio-pci: Cannot read device rom
at 0000:02:00.0'
### In kernel log: 'vfio-pci 0000:02:00.0: Invalid PCI ROM header
signature: expecting 0xaa55, got 0x0000'
# Assemble qemu args
## Q35 is a good base chipset, run `qemu-system-x86_64 -machine help`
to get a list
opts="$opts -machine type=q35,accel=kvm"
## KVM allows for faster guests
opts="$opts -enable-kvm"
## Guest gets same CPU model as host (only works with KVM enabled).
### Don't let guest use KVM itself. Also apparently solves an issue:
#### From
https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#QEMU_commands:
#### 'kvm=off is used for NVIDIA cards to stop it detecting a
hypervisor and therefore exiting with an error.'
#opts="$opts -cpu host,kvm=off"
### Fix from
http://vfio.blogspot.com/2014/08/vfiovga-faq.html?showComment=1452870650776#c3703276360523701353
opts="$opts -cpu
host,kvm=off,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_vendor_id=Nvidia43FIX"
## I have a quad core processor. let guest have 6 CPUs (3 cores with
hyperthreading)
opts="$opts -smp 6,sockets=1,cores=3,threads=2"
## I have 16GB of RAM, let guest have 8GB.
opts="$opts -m 8G"
## Give guest an emulated intel sound card
opts="$opts -soundhw hda"
## Give guest video card.
### Need to add the vendor + product to /etc/modprobe.d/vfio.cfg
### Pass PCI Bridge the GFX card is on.
### XXX: Where are docs on multifunction and x-vga options??
#### Info on x-vga:
http://www.firewing1.com/howtos/fedora-20/create-gaming-virtual-machine-using-vfio-pci-passthrough-kvm
#opts="$opts -device vfio-pci,host=00:01.0,multifunction=on,x-vga=on"
### Then the GFX card itself
#### If you pass x-vga=on it complains: 'vfio: Device does not support
requested feature x-vga'
opts="$opts -device vfio-pci,host=02:00.0,multifunction=on"
## Hard Drive
### Created with 'qemu-img create -f raw win.img 16G' then installed
windows onto it
opts="$opts -drive file=win.img,format=raw"
# Start Qemu
exec qemu-system-x86_64 $opts $*
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