gpu_passthrough - mehome/openthos GitHub Wiki

Before beginning,you should check your hardware,this is needed:

• Intel vt-d support
  In my case,GPU:intel+AMD:
  Intel Corporation Broadwell-U Integrated Graphics (rev 09)
  Advanced Micro Devices, Inc. [AMD/ATI] Opal XT [Radeon R7 M265] (rev ff)
  Then you can follow next steps:
  #1. Modifying kernel config:

  make menuconfig
  set "Bus options (PCI etc.)" -> "PCI Stub driver" to ""
  set "Device Drivers" -> "IOMMU Hardware Support" to ""
  exit/save

#2. build kernel:

make  
make modules_install  
make install  

#3. reboot and verify that your system has IOMMU support

 command into the Terminal   "dmesg | grep -e DMAR -e IOMMU"

 ...
 IOMMU enabled
 ...

If you get no output you'll need to fix this before moving on. Check if your hardware supports VT-d and check that it has been enabled in BIOS.

NOTE: On Intel platforms it is necessary to add intel_iommu=on on the kernel commandline (add in to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and run update-grub).

#4. unbind device from host kernel driver (example PCI device 00:02.0)

Load the PCI Stub Driver if it is compiled as a module  

   modprobe pci_stub  

lspci -n  
locate the entry for device 01:00.0 and note down the vendor & device ID 8086:1616  

   ...  
   00:02.0 8086:1616    
   ...  

echo "8086 1616" > /sys/bus/pci/drivers/pci-stub/new_id  
echo 0000:00:02.0 > /sys/bus/pci/devices/0000:00:02.0/driver/unbind  
echo 0000:00:02.0 > /sys/bus/pci/drivers/pci-stub/bind  

#5. load KVM modules:(this step is not necessary)

modprobe kvm  
modprobe kvm-intel  

#6. assign device:

/usr/local/bin/qemu-system-x86_64 -m 512 -boot c -net none -cdrom /home/bjz/android4.4-rc4.iso -device pci-assign,host=00:02.0