On 26/08/2024 19:56, Jan Kiszka wrote:

Only few of the K3 SoCs have an IOMMU and, thus, can isolate the system
against DMA-based attacks of external PCI devices. The AM65 is without
an IOMMU, but it comes with something close to it: the Peripheral
Virtualization Unit (PVU).

The PVU was originally designed to establish static compartments via a
hypervisor, isolate those DMA-wise against each other and the host and
even allow remapping of guest-physical addresses. But it only provides
a static translation region, not page-granular mappings. Thus, it cannot
be handled transparently like an IOMMU.

You keep developing on some old kernel. I noticed it on few patchsets
last days. Please work on mainline.

Best regards,
Krzysztof