TrustZone. It is "one level deeper" just like any other hypervisor or monitor. A...

TrustZone. It is "one level deeper" just like any other hypervisor or monitor. As far as I know, it is quite common in Android phones for HSM and DRM purposes. Yay? =\

http://www.arm.com/products/processors/technologies/trustzon...

Edit: And, of course, it is probably exploitable in some way. See http://bits-please.blogspot.com/2015/08/exploring-qualcomms-...