13th Generation Intel® Core™ and Intel® Core™ 14th Generation Processors

Datasheet, Volume 1 of 2
Supporting 13th Generation Intel® Core™ Processor for S, H, P, HX, and U Processor Line Platforms, formerly known as Raptor Lake, Intel® Core™ 14th Generation Processor for S, HX, and U Processor Line Platform, formerly known as Raptor Lake Refresh and Intel® Xeon™ E 2400 Processor, formerly known As Raptor Lake–E

ID 743844
Date 03/25/2024
Document Table of Contents

Devil’s Gate Rock

Devil’s Gate Rock (DGR) is a BIOS hardening technology that splits SMI (System Management Interrupts) handlers into Ring 3 and Ring 0 portions.

Supervisor/user paging on the smaller Ring 0 portion will enforce access policy for all the ring 3 code with regard to the SMM state save, MSR registers, IO ports and other registers.

The Ring 0 portion can perform save/restore of register context to allow the Ring 3 section to make use of those registers without having access to the OS context or the ability to modify the OS context.

The Ring 0 portion is signed and provided by Intel. This portion is attested by the processor.