4 ms·

I have no specific knowledge, but it seems similar to issues we had before iommus. E.g. maybe the device accesses physical memory without memory protection and/

I have no specific knowledge, but it seems similar to issues we had before iommus. E.g. maybe the device accesses physical memory without memory protection and/or virtual address mapping, so the kernel needs to do that in its behalf.

saagarjha 2y ago
This is correct, typically these devices need some page tables/IOMMU be set up to be told where they should read and write from.