Passthrough Audio - crashes network controller (Intel NUC 8)

[mkriegl]

I guys,

recently I managed to passthrough the GPU of an UBUNTU VM on my Intel NUC 8. Therefore I was also able to recognise the network controller seems to crash when I want to passthrough audio in addition. Every time I started the VM with audio passthrough the host and VM/containers where not accessible via Web or ssh. With the GPU passthrough I was able to see, that the boot process is stuck within the network controller for 2mins and than proceeds without network. I also see at lspci that audio is within the same group as network controller. Can anyone help out, as I really just add the audio controller and not the complete group. I checked with and without "pcie=1".
Without the audio passthrough everything keeps on running, but I guess I got some performance issues in the VM on the network side (online video hangs quite often or apt update hangs), but I guess this is not in relation to the issue I got with audio and network controller.

Spoiler: qemu-server/200.conf

bios: ovmf
bootdisk: scsi0
cores: 6
efidisk0: local-lvm:vm-200-disk-1,size=4M
hostpci0: 00:02,pcie=1,x-vga=1
hostpci1: 00:1f.3
machine: q35
memory: 4096
name: KODI
net0: virtio=EA:2D:1B:7D:49:74,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: local-lvm:vm-200-disk-0,size=10G
scsihw: virtio-scsi-pci
smbios1: uuid=ff262d0d-023e-4784-8ee5-4a0fc0069273
sockets: 1
usb0: host=045e:0717,usb3=1
vga: none
vmgenid: 96f1fecb-e4de-4071-9ebf-2162be6f0d0c

Spoiler: lspci -v -s 00:1f audio/network

00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30) (prog-if 80)
Subsystem: Intel Corporation Cannon Point-LP High Definition Audio Controller
Flags: bus master, fast devsel, latency 32, IRQ 11
Memory at c0b20000 (64-bit, non-prefetchable) [size=16K]
Memory at 404ab00000 (64-bit, non-prefetchable) [size=1M]
Capabilities: [50] Power Management version 3
Capabilities: [80] Vendor Specific Information: Len=14 <?>
Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
Kernel driver in use: vfio-pci
Kernel modules: snd_hda_intel, snd_sof_pci

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (6) I219-V (rev 30)
Subsystem: Intel Corporation Ethernet Connection (6) I219-V
Flags: bus master, fast devsel, latency 0, IRQ 137
Memory at c0b00000 (32-bit, non-prefetchable) [size=128K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Kernel driver in use: e1000e
Kernel modules: e1000e

Spoiler: lspci

00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics 655 (rev 01)
00:08.0 System peripheral: Intel Corporation Skylake Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Point-LP Thermal Controller (rev 30)
00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)
00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)
00:14.3 Network controller: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] (rev 30)
00:16.0 Communication controller: Intel Corporation Cannon Point-LP MEI Controller (rev 30)
00:17.0 SATA controller: Intel Corporation Cannon Point-LP SATA Controller [AHCI Mode] (rev 30)
00:1c.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)
00:1c.4 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)
00:1d.6 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)
00:1f.0 ISA bridge: Intel Corporation Cannon Point-LP LPC Controller (rev 30)
00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30)
00:1f.4 SMBus: Intel Corporation Cannon Point-LP SMBus Controller (rev 30)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Point-LP SPI Controller (rev 30)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (6) I219-V (rev 30)
6d:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981
6e:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)

 

[dcsapak]

I also see at lspci that audio is within the same group as network controller. Can anyone help out, as I really just add the audio controller and not the complete group. I checked with and without "pcie=1".

this is a hardware limitation, you can only passthrough whole groups or don't use the rest, but not use one part on the host and one part in the vm...

 

[mkriegl]

this is a hardware limitation, you can only passthrough whole groups or don't use the rest, but not use one part on the host and one part in the vm...

Thanks Dominik, I read through a couple of post and found the "acs override patch". Might there be a chance to separate audio from the group with that patch - when finding a recent one for the kernel?
https://forum.proxmox.com/threads/p...ing_acs_capabilities-patch.23099/#post-116518

Everything is fine for me with the Proxmox solution, otherwise I need to find something different for my setup.

 

[daftlink]

Thanks Dominik, I read through a couple of post and found the "acs override patch". Might there be a chance to separate audio from the group with that patch - when finding a recent one for the kernel?
https://forum.proxmox.com/threads/p...ing_acs_capabilities-patch.23099/#post-116518

Everything is fine for me with the Proxmox solution, otherwise I need to find something different for my setup.

DId you success to manage it ?

 

[mkriegl]

DId you success to manage it ?

Sorry, but I gave up, as I still need audio next to video. As Audio is within the same adress group as network, it is impossible to passthrough audio only. I tried to install KODI on the Host without success, either.
I was thinking about an Ubuntu Server with KODI running on the host and manual container set up on it. But I did not found the time to work on that as I got no test server to work with Ubuntu and container on it