On Tue, Jan 5, 2016 at 3:57 PM, Milos Kaurin <[email protected]> wrote:
> Hello, > > Firstly, a big thanks to everyone contributing to VFIO and other > virtualization technologies that are making my GPU pass-through dream > come true. > > I currently have this: > > CPU: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz > > ================================== > -[0000:00]-+-00.0 Intel Corporation 4th Gen Core Processor DRAM Controller > +-01.0-[01]--+-00.0 NVIDIA Corporation GK104 [GeForce GTX 770] > | \-00.1 NVIDIA Corporation GK104 HDMI Audio > Controller > +-02.0 Intel Corporation Xeon E3-1200 v3/4th Gen Core > Processor Integrated Graphics Controller > +-03.0 Intel Corporation Xeon E3-1200 v3/4th Gen Core > Processor HD Audio Controller > +-14.0 Intel Corporation 8 Series/C220 Series Chipset > Family USB xHCI > +-16.0 Intel Corporation 8 Series/C220 Series Chipset > Family MEI Controller #1 > +-19.0 Intel Corporation Ethernet Connection I217-LM > +-1b.0 Intel Corporation 8 Series/C220 Series Chipset High > Definition Audio Controller > +-1c.0-[02]-- > +-1c.1-[03-04]----00.0-[04]-- > +-1f.0 Intel Corporation Q87 Express LPC Controller > +-1f.2 Intel Corporation 8 Series/C220 Series Chipset > Family 6-port SATA Controller 1 [AHCI mode] > \-1f.3 Intel Corporation 8 Series/C220 Series Chipset > Family SMBus Controller > ==================================================================== > > To avoid pasting iommu groups, every device is now in its own separate > group due to ACS patch. > You don't need the ACS patch > Running on FC23 with a custom Kernel: > Linux gammalinux 4.2.8-300.milos.fc23.x86_64 #1 SMP Sun Jan 3 23:38:23 > GMT 2016 x86_64 x86_64 x86_64 GNU/Linux > > Custom kernel: > I have applied the ACS patch because my CPU root bridge (IIRC) was > grouped with the NVIDIA GPU/audio. I have also applied the i915 > arbiter patch. > > My virt is UEFI based (virt-manager instructions from the blog), > Windows 10 Guest, no audio (yet) > You don't need the i915 patch > >From what I understood from Alex's blog and some other material of his > I found online, if you want to use an integrated Intel GPU for the > host, you have to apply the arbiter patch to avoid display corruption > etc because i915 driver is a liar. > > My first question is: Is this only true for BIOS-based guests or does > it also go for UEFI based guests? > Only using BIOS, x-vga=on. You have a UEFI guest, use the stock Fedora kernel. > I'm asking because even though I applied the i915 arbiter patch, I > disabled the entry in modprobe.d to test and see what will happen. > Nothing happens on guest/host (Ran 3dmark extreme benchmarks multiple > times now). > > Second question: > I'm thinking of letting the guest have the "USB xHCI" controller(14.0 > from the lspci above). Due to some warnings from Alex on ACS being > potentially dangerous, I wanted to ask you guys whether it's safe to > use vfio-pci on that device. > You don't need the ACS patch to assign that device either.
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