xe driver: SR-IOV VFs not created on boot despite correct kernel parameters

[tempaone]

Hello,

I am experiencing an issue where the xe driver fails to initialize SR-IOV virtual functions automatically on boot, despite having the correct kernel parameters configured. I have followed the PVE 9.1 installation steps, but the VFs remain unavailable until I manually intervene.

Environment:

OS: Proxmox VE 9.1 (Kernel: 6.17.13-1-pve)

Hardware: Raptor Lake-P [Iris Xe Graphics]

Configuration:
My GRUB cmdline includes the necessary parameters:
GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on xe.max_vfs=7 xe.force_probe=0xa7a0 module_blacklist=i915 initcall_blacklist=sysfb_init pcie_aspm=off"

The Issue:
On boot, the VFs are not created. However, if I manually run modprobe xe (if not already loaded) followed by writing to sriov_numvfs, the VFs initialize perfectly.

Steps to Reproduce:

Boot the system.

Check lspci | grep VGA -> Only the physical function (00:02.0) is visible.

Manually run:

modprobe xe
echo 7 | tee /sys/bus/pci/devices/0000:00:02.0/sriov_numvfs

VFs are created successfully.

Expected Behavior:
The xe driver should initialize SR-IOV VFs automatically during the boot sequence based on the xe.max_vfs=7 parameter.

Actual Behavior:
The driver does not load, sriov_numvfs interface does not trigger the creation of VFs until a manual write operation is performed after the kernel has finished booting.

root@caxey-pve:~# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
02:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 710] (rev a1
root@caxey-pve:~# echo 7 | tee /sys/bus/pci/devices/0000:00:02.0/sriov_numvfs
7
tee: '/sys/bus/pci/devices/0000:00:02.0/sriov_numvfs': No such file or directory
root@caxey-pve:~# modprobe xe
root@caxey-pve:~# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
02:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 710] (rev a1
root@caxey-pve:~# echo 7 | tee /sys/bus/pci/devices/0000:00:02.0/sriov_numvfs
7
root@caxey-pve:~# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.1 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.2 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.3 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.4 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.5 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.6 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
00:02.7 VGA compatible controller: Intel Corporation Raptor Lake-P [Iris Xe Graphics](rev 04)
02:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 710] (rev a1)

[tempaone]

i fixed the issue, i had a blacklist from the previous version
'''
root@caxey-pve:# grep -rn "xe" /etc/modprobe.d/
/etc/modprobe.d/i915-sriov-dkms.conf:1:blacklist xe
root@caxey-pve:# sed -i '/blacklist xe/d' /etc/modprobe.d/i915-sriov-dkms.conf
root@caxey-pve:# grep -rn "xe" /etc/modprobe.d/
root@caxey-pve:# update-initramfs -u
'''