[vfio-users] GPU Pass Through with KVM

[Brett Peckinpaugh]

Skylake has no iommu separation. The only way I got it to work was with that unsupported ACS patch. You might be able to get the host to run on the igd and passthrough the video card but odds are too many devices share the same root port. 

Have you read Alex's website guide? It helped me alot. 

http://vfio.blogspot.com/2016/10/how-to-improve-performance-in-windows-7.html?m=1


On July 16, 2017 9:25:57 PM PDT, Chris Crutchfield <clcrutch at cox.net> wrote:
>I have tried a few different distros (Ubuntu 16.04, Arch Linux, Fedora
>25) and have been unsuccessful at getting my GPU to correctly
>passthrough.  I have been trying to use Windows 10 x64 1703 for my
>guest.  It runs correctly without my GPU connected to the VM, but
>typically, but not always, fails when the GPU is connected.
>
>CPU: Intel I7 Skylake
>GPU: AMD Radeon R9 380
>
>Below are the results when I run “uname -r”
>4.11.8-200.fc25.x86_64
>
>Below are the results when I run “lspci -nnk”
>00:00.0 Host bridge [0600]: Intel Corporation Skylake Host Bridge/DRAM
>Registers [8086:191f] (rev 07)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>	Kernel driver in use: skl_uncore
>00:01.0 PCI bridge [0604]: Intel Corporation Skylake PCIe Controller
>(x16) [8086:1901] (rev 07)
>	Kernel driver in use: pcieport
>	Kernel modules: shpchp
>00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-H USB
>3.0 xHCI Controller [8086:a12f] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>	Kernel driver in use: xhci_hcd
>00:16.0 Communication controller [0780]: Intel Corporation Sunrise
>Point-H CSME HECI #1 [8086:a13a] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>	Kernel driver in use: mei_me
>	Kernel modules: mei_me
>00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-H SATA
>controller [AHCI mode] [8086:a102] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>	Kernel driver in use: ahci
>00:1b.0 PCI bridge [0604]: Intel Corporation Sunrise Point-H PCI Root
>Port #17 [8086:a167] (rev f1)
>	Kernel driver in use: pcieport
>	Kernel modules: shpchp
>00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-H PCI
>Express Root Port #1 [8086:a110] (rev f1)
>	Kernel driver in use: pcieport
>	Kernel modules: shpchp
>00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-H PCI
>Express Root Port #9 [8086:a118] (rev f1)
>	Kernel driver in use: pcieport
>	Kernel modules: shpchp
>00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-H LPC
>Controller [8086:a145] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-H PMC
>[8086:a121] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-H HD Audio
>[8086:a170] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:86c9]
>	Kernel driver in use: snd_hda_intel
>	Kernel modules: snd_hda_intel
>00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-H SMBus
>[8086:a123] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>	Kernel driver in use: i801_smbus
>	Kernel modules: i2c_i801
>00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet
>Connection (2) I219-V [8086:15b8] (rev 31)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8672]
>	Kernel driver in use: e1000e
>	Kernel modules: e1000e
>01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
>[AMD/ATI] Tonga PRO [Radeon R9 285/380] [1002:6939] (rev f1)
>	Subsystem: ASUSTeK Computer Inc. Device [1043:04e3]
>	Kernel driver in use: vfio-pci
>	Kernel modules: amdgpu
>01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI]
>Tonga HDMI Audio [Radeon R9 285/380] [1002:aad8]
>	Subsystem: ASUSTeK Computer Inc. Device [1043:aad8]
>	Kernel driver in use: vfio-pci
>	Kernel modules: snd_hda_intel
>02:00.0 Non-Volatile memory controller [0108]: Lite-On Technology
>Corporation M8Pe Series NVMe SSD [14a4:22f1] (rev 01)
>	Subsystem: Marvell Technology Group Ltd. Device [1b4b:1093]
>	Kernel driver in use: nvme
>	Kernel modules: nvme
>03:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1142 USB 3.1
>Host Controller [1b21:1242]
>	Subsystem: ASUSTeK Computer Inc. Device [1043:8675]
>	Kernel driver in use: xhci_hcd
>
>I know very little about KVM and am unsure about how to go about
>troubleshooting.
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