公开(公告)号：US11941391B2

公开(公告)日：2024-03-26

申请号：US16841410

申请日：2020-04-06

Applicant: Intel Corporation

Inventor： Mohan J. Kumar ,  Sarathy Jayakumar ,  Chuan Song ,  Ruixia Li ,  Xiaojin Yuan ,  Haiyue Wang ,  Chong Han

IPC: G06F8/656 ,  G06F8/654 ,  G06F9/4401 ,  G06F9/445 ,  G06F9/455

CPC classification number: G06F8/656 ,  G06F8/654 ,  G06F9/4401 ,  G06F9/44557 ,  G06F9/45541

Abstract: A microcode (uCode) hot-upgrade method for bare metal cloud deployment and associated apparatus. The uCode hot-upgrade method applies a uCode patch to a firmware storage device (e.g., BIOS SPI flash) through an out-of-band controller (e.g., baseboard management controller (BMC)). In conjunction with receiving a uCode patch, a uCode upgrade interrupt service is triggered to upgrade uCode for one or more CPUs in a bare-metal cloud platform during runtime of a tenant host operating system (OS) using an out-of-bound process. This innovation enables cloud service providers to deploy uCode hot-patches to bare metal servers for persistent storage and live-patch without touching the tenant operating system environment.