公开(公告)号：US10671422B2

公开(公告)日：2020-06-02

申请号：US15685861

申请日：2017-08-24

Applicant: Advanced Micro Devices, Inc.

Inventor： David Kaplan ,  Jeremy W. Powell ,  Richard Relph

IPC: G06F9/455

Abstract: A security module in a memory access path of a processor of a processing system protects secure information by verifying the contents of memory pages as they transition between one or more virtual machines (VMs) executing at the processor and a hypervisor that provides an interface between the VMs and the processing system's hardware. The security module of the processor is employed to monitor memory pages as they transition between one or more VMs and a hypervisor so that memory pages that have been altered by a hypervisor or other VM cannot be returned to the VM from which they were transitioned.