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Hi all!
In the past two weeks I've set up my first LFS build using Arch and everything is working great! Well, almost everything.
I'm trying to get a VM set up with vfio for Windows gaming but I'm having trouble and I don't know where to look to fix this... Following this guide: https://bbs.archlinux.org/viewtopic.php?id=162768
I have compiled and am running AUR\linux-vfio, with amd_iommu=on and my processor supports virtualization. pci-stubs holding on to the card to be virtualized.
Cobbled together specs - The 7850 is my host and the 7870 is to be passed to the VM.
OS: Arch Linux
Kernel: x86_64 Linux 4.0.4-2-vfio
CPU: AMD Phenom II X4 955 @ 3.2GHz
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850] [1002:6819]
01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series] [1002:aab0]
02:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn XT [Radeon HD 7870 GHz Edition] [1002:6818]
02:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series] [1002:aab0]When I try to run the test in the linked thread, I get the following:
archdeckstawp% qemu-system-x86_64 -enable-kvm -m 1024 -cpu host,kvm=off \
> -smp 4,sockets=1,cores=4,threads=1 \
> -device vfio-pci,host=02:00.0,x-vga=on -device vfio-pci,host=02:00.1 \
> -vga none
qemu-system-x86_64: -device vfio-pci,host=02:00.0,x-vga=on: vfio: error no iommu_group for device
qemu-system-x86_64: -device vfio-pci,host=02:00.0,x-vga=on: Device initialization failed
qemu-system-x86_64: -device vfio-pci,host=02:00.0,x-vga=on: Device 'vfio-pci' could not be initializedI checked dmesg and found the following errors, and a patch linked here from Bumblebee, but I don't believe this is the issue so I haven't tried it yet - going to investigate more: https://github.com/Bumblebee-Project/Bu … nt-5804686
archdeckstawp% dmesg | grep vgaarb
[ 0.347409] vgaarb: setting as boot device: PCI:0000:01:00.0
[ 0.347411] vgaarb: device added: PCI:0000:01:00.0,decodes=io+mem,owns=io+mem,locks=none
[ 0.347413] vgaarb: device added: PCI:0000:02:00.0,decodes=io+mem,owns=none,locks=none
[ 0.347415] vgaarb: loaded
[ 0.347416] vgaarb: bridge control possible 0000:02:00.0
[ 0.347417] vgaarb: bridge control possible 0000:01:00.0
[ 17.814588] vgaarb: this pci device is not a vga device
... 22 times ...
[ 17.814761] vgaarb: this pci device is not a vga device
[ 17.814778] vgaarb: device changed decodes: PCI:0000:02:00.0,olddecodes=io+mem,decodes=none:owns=none
[ 17.814794] vgaarb: this pci device is not a vga device
... 3 times ...
[ 17.814848] vgaarb: this pci device is not a vga deviceFor some strange reason I feel like virtualization isn't working on my machine. I've checked the BIOS, virtualization is enabled... I just can't get iommu turned on. Any ideas?
Last edited by SkySky (2015-06-12 01:14:22)
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So after a bit more research, looks like my motherboard doesn't support IOMMU... http://forums.tweaktown.com/gigabyte/39 … witch.html
[ 0.000000] AGP: Please enable the IOMMU option in the BIOS setup
[ 1.949134] AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>
[ 1.949136] AMD IOMMUv2 functionality not available on this systemBlah, looks like I have to build a new system (or at least get a new mobo) to get this figured out. I've put in a ticket with gigabyte for my mobo to see if they'll do anything for me, but I doubt it...
I'm hesitant to mark this as solved... would anyone have any ideas on how I could get this working otherwise?
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What motherboard do you have?
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What motherboard do you have?
Gigabyte GA-790XTA-UD4, bios version F8. There's an F9 beta bios I might flash but I need to figure out how to do that from Arch or install Windows.
EDIT: Response from Gigabyte, there's no IOMMU support on the board. Marking as solved, I guess...
Last edited by SkySky (2015-06-12 01:14:05)
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