公开(公告)号：US11816228B2

公开(公告)日：2023-11-14

申请号：US17032984

申请日：2020-09-25

Applicant: Advanced Micro Devices, Inc.

Inventor： Donald P. Matthews, Jr. ,  William A. Moyes

IPC: G06F21/60 ,  H04L9/14

CPC classification number: G06F21/602 ,  H04L9/14

Abstract: Systems, apparatuses, and methods for implementing a metadata tweak for channel encryption differentiation are disclosed. A memory controller retrieves a device-unique identifier (ID) from a memory device coupled to a given memory channel slot. The memory controller uses the device-unique ID to generate a tweak value used for encrypting data stored in the device. In one scenario, the device-unique ID is embedded in the address bits of the tweak process. In this way, the memory device can be migrated to a different memory channel since the data can be decrypted independently of the channel. This is possible since the device-unique ID used for the tweak operation is retrieved from the metadata stored locally on the memory device. In one implementation, the memory device is a persistent dual in-line memory module (DIMM). In some implementations, the link between memory controller and memory device is a compute express link (CXL) compliant link.

公开(公告)号：US11860797B2

公开(公告)日：2024-01-02

申请号：US17565666

申请日：2021-12-30

Applicant: ADVANCED MICRO DEVICES, INC. ,  ATI TECHNOLOGIES ULC

Inventor： Philip Ng ,  Nippon Raval ,  David A. Kaplan ,  Donald P. Matthews, Jr.

IPC: G06F13/10 ,  G06F12/084 ,  G06F12/1081

CPC classification number: G06F13/102 ,  G06F12/084 ,  G06F12/1081 ,  G06F2212/603

Abstract: Restricting peripheral device protocols in confidential compute architectures, the method including: receiving a first address translation request from a peripheral device supporting a first protocol, wherein the first protocol supports cache coherency between the peripheral device and a processor cache; determining that a confidential compute architecture is enabled; and providing, in response to the first address translation request, a response including an indication to the peripheral device to not use the first protocol.