Get passed through device back to host?

[unf0rg0tt3n]

Hey Guys,

I have a question which I think is a stupid one to ask, but I can't get to find the answer to it.
How can I get a passed through device back to the host when the guest is no longer using it?
I know a power cycle helps, but that isn't nifty

Thanks in advance!

Dennis

 

[GarrettB]

If part of passing through the device includes blacklisting it at boot via modprobe.d modifications, you'll have to un-blacklist it. Otherwise, with devices like USB keyboard, mouse, etc it will be available when the guest is not using it.

 

[unf0rg0tt3n]

If part of passing through the device includes blacklisting it at boot via modprobe.d modifications, you'll have to un-blacklist it. Otherwise, with devices like USB keyboard, mouse, etc it will be available when the guest is not using it.

It's a PCI-e HBA, I have blacklisted video drivers in the past and followed this tutorial: https://www.reddit.com/r/homelab/co..._source=amp&utm_medium=&utm_content=post_body

Which includes the following blacklists:
echo "blacklist radeon" >> /etc/modprobe.d/blacklist.conf echo "blacklist nouveau" >> /etc/modprobe.d/blacklist.conf echo "blacklist nvidia" >> /etc/modprobe.d/blacklist.conf
Does that also count as blacklisting for a HP smart array P822?
The guest isn't freeing the pci device but I can use it in other guests.

 

[GarrettB]

I don't think those blacklists commands are going to affect your card, but do you also have the ids for the card noted in /etc/modprobe.d/vfio.conf?

 

[unf0rg0tt3n]

I don't think those blacklists commands are going to affect your card, but do you also have the ids for the card noted in /etc/modprobe.d/vfio.conf?

I did not put the id in that file. Put the card in this morning and passed it to my freenas. It did not work for some reason and wanted to figure that out. Could get the card back until reboot so want to figure that out even more haha .

 

[GarrettB]

Sometimes the card slot can be power toggled. This might be a method vs total reboot.

 

[unf0rg0tt3n]

Sometimes the card slot can be power toggled. This might be a method vs total reboot.

Would that by any chance be possible for a supermicro x9drl-if

 

[GarrettB]

https://unix.stackexchange.com/questions/73908/how-to-reset-cycle-power-to-a-pcie-device
Can't tell you for sure, sorry. But here's a discussion about the topic.

 

[unf0rg0tt3n]

https://unix.stackexchange.com/questions/73908/how-to-reset-cycle-power-to-a-pcie-device
Can't tell you for sure, sorry. But here's a discussion about the topic.

Unfortunately that doesn't work. I will have to reboot next time. Thanks for your support!

For other forum users searching for the same.
The following command could help:
echo "1" > /sys/bus/pci/devices/$NUMBER/reset