https://forum.proxmox.com/threads/pve8-change-to-iommu-passthrough.137721/
PVE8 - Change to IOMMU/Passthrough? | Proxmox Support Forum
Recently upgraded from PMX7 (Proxmox Version 7 or PVE7) to PMX8 (Proxmox Version 8 or PVE8), and I noticed the passthrough doesn't seem to work the same way...
iommu passthroughproxmox supportchangeforum
https://cateee.net/lkddb/web-lkddb/IOMMU_DEFAULT_PASSTHROUGH.html
Linux Kernel Driver DataBase: CONFIG_IOMMU_DEFAULT_PASSTHROUGH: Passthrough
linux kerneldriverdatabaseconfigiommu
https://lkml.indiana.edu/2302.0/05916.html
Linux-Kernel Archive: Re: [PATCH] iommu/arm-smmu-v3: Enable PCI ATS in passthrough mode as well
linux kernelas wellarchivepatchiommu