Re: GPU passthrough

[Anton Valishin]

solved by

#VFIO
-device pcie-root-port,bus=pcie.0,id=pci_root,multifunction=true,addr=0x2
-device '{"driver":"pcie-root-port","port":20,"chassis":5,"id":"pci.5","bus":"pcie.0","addr":"0x2.0x4"}'
-device '{"driver":"pcie-root-port","port":21,"chassis":6,"id":"pci.6","bus":"pcie.0","addr":"0x2.0x5"}'
-device '{"driver":"vfio-pci","host":"0000:06:00.0","id":"gpu","bus":"pci.5","addr":"0x0"}'
-device '{"driver":"vfio-pci","host":"0000:06:00.1","id":"hdmiaudio","bus":"pci.6","addr":"0x0"}'
#

вс, 12 мая 2024 г. в 02:41, Anton Valishin <antxzq@gmail.com>:

I see tiano core boot screen and when driver is activated (by powershell enable-pnp on user logon)
I see the black screen when I try to run with qemu cmd

But when with libvirt it works fine

вс, 12 мая 2024 г. в 02:00, Anton Valishin <antxzq@gmail.com>:

Hello! I'm trying to passthrough gpu to windows vm

When using virt-manager it works fine
<hostdev mode="subsystem" type="pci" managed="yes">
  <source>
    <address domain="0x0000" bus="0x06" slot="0x00" function="0x0"/>
  </source>
  <address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
</hostdev>

but when i try to run with
-device pcie-root-port,bus=pcie.0,slot=1,x-speed=16,x-width=32
-device vfio-pci,host="06:00.0",multifunction=on,bus=pcie.0,rombar=1
-device vfio-pci,host="06:00.1",bus=pcie.0

I only see black screen

hot to fix qemu cmd so that it works like in virt-manager&