IOMMU setup question

[Ryan_Malone]

I'm trying to enable PCIe passthrough and have been following the guidance below. First strange thing was there was no /etc/modules/cmdline folder. Should I be worried? Not sure how to turn on IOMMU without that.

https://pve.proxmox.com/wiki/PCI(e)_Passthrough


After adding the modules to etc/modules and then refreshing initramfs, it seems like the modules were ignored. I assume maybe because I was not able to set the IOMMU-on.


What step am I missing as the guidance doesn't seem to quite align with my setup on 8.1.4?

 

[leesteken]

First strange thing was there was no /etc/modules/cmdline folder. Should I be worried? Not sure how to turn on IOMMU without that.

There is no mention of /etc/modules/cmdline in the documentation. There is a file named /etc/modules where you can add modules by name.

https://pve.proxmox.com/wiki/PCI(e)_Passthrough
View attachment 69223

After adding the modules to etc/modules and then refreshing initramfs, it seems like the modules were ignored. I assume maybe because I was not able to set the IOMMU-on.

On PVE 8.2 with kernel 6.8, you don't need intel_iommu=on. Why are you still running kernel 6.5?

View attachment 69226

What step am I missing as the guidance doesn't seem to quite align with my setup on 8.1.4?

Looks like you have installed a much older proxmox without ESP partitions (which are managed by proxmox-boot-tool) and upgraded in place to PVE 8.1?

 

[Ryan_Malone]

There is no mention of /etc/modules/cmdline in the documentation. There is a file named /etc/modules where you can add modules by name.

I did add them but they don't show up.

There is. When you click on the link to the kernel command line.

On PVE 8.2 with kernel 6.8, you don't need intel_iommu=on. Why are you still running kernel 6.5?

I just downloaded the latest ISO last week and installed it. Not sure how it's possible to have downloaded an older version. It's a fresh install. I even reinstalled it once since then.

Looks like you have installed a much older proxmox without ESP partitions (which are managed by proxmox-boot-tool) and upgraded in place to PVE 8.1?

Nope. 2 fresh installs in the last week.

How would I upgrade? apt-get upgrade doesn't work. Is there a different command on an older kernel?

 

[leesteken]

I did add them but they don't show up.
View attachment 69229

vfio_virqfd no longer exists. Maybe use the manual instead of the Wiki: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_pci_passthrough

There is. When you click on the link to the kernel command line.
View attachment 69227

There is still no mention of /etc/modules/cmdline. Maybe the manual is more clear (and it also depends on which bootloader you use): https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysboot_edit_kernel_cmdline

I just downloaded the latest ISO last week and installed it. Not sure how it's possible to have downloaded an older version. It's a fresh install. I even reinstalled it once since then.

Nope. 2 fresh installs in the last week.

Somethings is wrong if you cleanly installed the latest Proxmox VE 8.2 and kernel 6.5 is active. All of this is not necessary on PVE 8.2: https://forum.proxmox.com/threads/i...rking-but-i’m-not-sure-why.148170/post-669976

 

[Ryan_Malone]

vfio_virqfd no longer exists. Maybe use the manual instead of the Wiki: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_pci_passthrough

There is still no mention of /etc/modules/cmdline. Maybe the manual is more clear (and it also depends on which bootloader you use): https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysboot_edit_kernel_cmdline