This stuff doesn't exist because of a particular vendor or ISA; it's a mainstream feature for modern application platforms. Many ARM systems achieve similar end

This stuff doesn't exist because of a particular vendor or ISA; it's a mainstream feature for modern application platforms. Many ARM systems achieve similar ends through a kind of hypervisor / shadow OS that can't readily be disabled by the device owner [1]. [1] https://www.arm.com/products/security-on-arm/trustzone https://www.arm.com/products/security-on-arm/trustzone