how can i switch the integrated sound card to a windows vm?

[frenk970]

good evening,
I would like to pass the integrated sound card to my motherboard, but when I pass it also the lan card that I server for the host, how can I solve? is there a way to turn?

I pass it in passthrough

00:1f.0 ISA bridge: Intel Corporation Z390 Chipset LPC/eSPI Controller (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-V (rev 10)

these are the cards he passes and I just want to pass this one:

00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)

 

[dcsapak]

they are probably in the same iommu group, you can use this script to check (taken from https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Ensuring_that_the_groups_are_valid )

#!/bin/bash
shopt -s nullglob
for g in `find /sys/kernel/iommu_groups/* -maxdepth 0 -type d | sort -V`; do
    echo "IOMMU Group ${g##*/}:"
    for d in $g/devices/*; do
        echo -e "\t$(lspci -nns ${d##*/})"
    done;
done;

if they are in the same group, there is not much you can do safely (there is the ACS override patch method, but i would not recommend it for production use)

 

[frenk970]

they are probably in the same iommu group, you can use this script to check (taken from https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Ensuring_that_the_groups_are_valid )

#!/bin/bash
shopt -s nullglob
for g in `find /sys/kernel/iommu_groups/* -maxdepth 0 -type d | sort -V`; do
    echo "IOMMU Group ${g##*/}:"
    for d in $g/devices/*; do
        echo -e "\t$(lspci -nns ${d##*/})"
    done;
done;

if they are in the same group, there is not much you can do safely (there is the ACS override patch method, but i would not recommend it for production use)

yes, they are in the same iommu group.


I only need it to listen to video calls momentarily, how to use it ACS override patch method?

 

[dcsapak]

as i said, i would not recommend this. it can lead to the host crashing, not secure encapsulation, weird hardware behaviour etc.

if you still want to really do this, see https://wiki.archlinux.org/index.ph...passing_the_IOMMU_groups_(ACS_override_patch)

note that there are no guarantees that it works and nothing breaks

 

[frenk970]

as i said, i would not recommend this. it can lead to the host crashing, not secure encapsulation, weird hardware behaviour etc.

if you still want to really do this, see https://wiki.archlinux.org/index.ph...passing_the_IOMMU_groups_(ACS_override_patch)

note that there are no guarantees that it works and nothing breaks

thanks