Is there an IOMMU between the 3G/4G Modem and CPU in GL-MiFi?

Technical Support for Routers
1

Hi,

I’m guessing these devices communicated with the CPU over DMA.

Is there an IOMMU used, so if the modem’s processor is accessed it can’t take control of kernel memory running on the main CPU?

Thanks

DM

2

NO.

The talk with USB, no DMA, no memory share, no security leaks!