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Graphical Environments & Desktops • "AMD IOMMUv2 functionality not available on this system" When it should be

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I have been setting up a new VM on my machine and been running into an issue.

Code:

$ sudo dmesg | grep IOMMU[    0.022494] DMAR: IOMMU enabled[    2.191199] AMD-Vi: AMD IOMMUv2 functionality not available on this system - This is not a bug.
I have edited /etc/default/grub to have GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=1 amd_iommu=on" then run sudo update-grub, and then reboot.

I have dine the other steps past this like:
I've been able to verify the GPU (VGA and audio) ids as 1002:ab28,1002:743f

I know my cpu (intel 12700kf) should support this

Code:

$ ps -ef | grep amd_iommu_v2usr+    9164    8614  0 18:46 pts/0    00:00:00 grep amd_iommu_v2
update /etc/initramfs-tools/modules by adding
fio
vfio_iommu_type1
vfio_virqfd
options vfio_pci ids=1002:ab28,1002:743f
vfio_pci ids=1002:ab28,1002:743f
vfio_pci
amdgpu
update /etc/modules by adding the following
vfio
vfio_iommu_type1
vfio_pci ids=1002:ab28,1002:743f
creating and adding /etc/modprobe.d/amdgpu.conf
softdep amdgpu pre: vfio vfio_pci

as well as /etc/modprobe.d/vfio_pci.conf
options vfio_pci ids=1002:67df,1002:aaf0

This still leads to second GPUs second driver to be amdgpu rather than vfio-pci. Im pretty sure this is due to "AMD IOMMUv2 functionality not available on this system - This is not a bug."

Code:

$ lspci -vnn | grep -iP "vga|amdgpu|nvidia|nouveau|vfio-pci"03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21 [Radeon RX 6950 XT] [1002:73a5] (rev c0) (prog-if 00 [VGA controller])Kernel driver in use: amdgpuKernel modules: amdgpu09:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 24 [Radeon RX 6400/6500 XT/6500M] [1002:743f] (rev c1) (prog-if 00 [VGA controller])Kernel driver in use: amdgpuKernel modules: amdgpu

Statistics: Posted by abbatrombone — 2024-12-03 01:04 — Replies 5 — Views 100



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