Re: [PATCH 0/5] soc: ti: Add and use PVU on K3-AM65 for DMA isolation
From: Jan Kiszka <jan.kiszka@siemens.com>
Date: 2024-08-26 19:25:30
Also in:
linux-devicetree, linux-pci, lkml
On 26.08.24 20:53, Krzysztof Kozlowski wrote:
On 26/08/2024 19:56, Jan Kiszka wrote:quoted
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.
How did you come to this conclusion? This patch set was written for mainline, just rebased and tested again over next-20240826 before sending today. Jan -- Siemens AG, Technology Linux Expert Center