where to get device, and bus ids for gpu passthrough?

[Snowarch]

I saw a command for virtual box gpu passthrough, and would like to try it but i do not know where to find the required gpu info. 

 

the command is 

 

vboxmanage --pciattach bus number, device and function id. 

 

so where would i get these ids. virtual box 6.1 with ubuntu 16.04 host, windowd 7 guest.

 

to undo the command would it be 

 

--pcidetach (same ids?)

 

want to try this to see if will work for a few windows games.

 

 

[MS-DOS Guy]

3 hours ago, Snowarch said:

I saw a command for virtual box gpu passthrough, and would like to try it but i do not know where to find the required gpu info. 

 

the command is 

 

vboxmanage --pciattach bus number, device and function id. 

 

so where would i get these ids. virtual box 6.1 with ubuntu 16.04 host, windowd 7 guest.

 

to undo the command would it be 

 

--pcidetach (same ids?)

 

want to try this to see if will work for a few windows games.

 

 

VirtualBox PCI Passthrough support, which is essentially what you want, is very limited in terms of what form of hardware it will support. Although I did find some documentation on the matter:
https://www.virtualbox.org/manual/ch09.html#pcipassthrough
There are chapters for any thing you want to do within VirtualBox. 

[jj9987]

lspci or look into /proc/bus/pci/devices

[WereCatf]

13 minutes ago, Snowarch said:

want to try this to see if will work for a few windows games

Just a word of warning: if you are using the GPU for Linux already and it's not an Intel iGPU, trying to pass it through to a VM will most likely crash your system. Only Intel iGPU can be used simultaneously for the host and the virtual-machine, and even then it requires a couple of extra steps. For NVIDIA - and AMD - cards, you either need multiple GPUs or you need to prevent your Linux-system from using the GPU.

[Snowarch]

i have 3 diffrent gpus in the system. hopefully that'll be enough.

[Snowarch]

its not regristering --pciattach as a command. did i do something wrong? 

 

ending command after getting the id was this 

 

vbox manage modifyvm "7" -pciattach 02:00:0@03.01.0

 

tried 

 

02:00:0@03:01:0 as well

 

did i get the wrong id? or 2nd id? 

 

@jj9987

 

 

trying to pass a p106 to the vm. host is using a p104 and igpu.

[jj9987]

1 hour ago, Snowarch said:

its not regristering --pciattach as a command. did i do something wrong? 

 

ending command after getting the id was this 

 

vbox manage modifyvm "7" -pciattach 02:00:0@03.01.0

 

tried 

 

02:00:0@03:01:0 as well

 

did i get the wrong id? or 2nd id? 

 

@jj9987

 

 

trying to pass a p106 to the vm. host is using a p104 and igpu.

It's not registering because Virtualbox 6.1 dropped PCI passthrough support for Linux hosts. Also that's not the correct address - should be just 0:2.0 or 02:00.0 or similar (no @ and another address).

Quote

Linux host: Drop PCI passthrough, the current code is too incomplete (cannot handle PCIe devices at all), i.e. not useful enough

https://www.virtualbox.org/wiki/Changelog

[Windows7ge]

I wouldn't try to achieve GPU pass-through using VB. To pass-through hardware is a rather involved process. I have a tutorial for how to do this using QEMU/KVM and Virt-manager if you're interested. You'll have to adapt it to suit Ubuntu 16.04 though.

 

[Snowarch]

@Windows7ge

 

thanks, but kvm wouldn't work at all well. even with same settings, applied to the vm that i'd do with virtual box, slower boot times, and os install times consistantly than virtual box. everything in bios related to virtualisation is enabled on my z-390 board. people always claim kvm is a faster vm manager than virtual box by a huge margin, but it can bearly handle firefox alone.

 

 

and its only the opengl i need passed through.

 

would it be easier to install virtusl box 6.0 in a diffrent directory?

[Windows7ge]

1 hour ago, Snowarch said:

@Windows7ge

 

thanks, but kvm wouldn't work at all well. even with same settings, applied to the vm that i'd do with virtual box, slower boot times, and os install times consistantly than virtual box. everything in bios related to virtualisation is enabled on my z-390 board. people always claim kvm is a faster vm manager than virtual box by a huge margin, but it can bearly handle firefox alone.

 

 

and its only the opengl i need passed through.

 

would it be easier to install virtusl box 6.0 in a diffrent directory?

I don't know about it being faster. I'm just familiar with it having a lot more functionality.

 

I can't comment on using VB on Linux. I've only ever used QEMU/KVM.

[Snowarch]

well, kvm's user interface was lacking, and really slow. it can bearly run a browser alone.

 

is yours that slow or is something wrong with kvm itself on my system?

 

is it possible to use the virtual box command for kvm with

 

kvm managevm "7"  --pciattach id numbers

 

since ineed only opengl passwd through.

 

@Windows7ge

[Windows7ge]

Personally I use a 3rd party application known as Looking Glass. It copies the frame buffer directly out of GPU memory and displays it in a window you can move around at will. It also works for Keyboard/Mouse and even copy/paste of text. It's significantly better than the virt-manager display window.

 

Again, I really don't know. I'm not familiar with any CLI tools for VB.