公开(公告)号：US11907411B2

公开(公告)日：2024-02-20

申请号：US17777843

申请日：2019-12-09

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Mason Andrew Gunyuzlu ,  Robert Stephen Craig ,  Tevin Richards

IPC: G06F21/83 ,  G06F21/31 ,  G06F21/74

CPC classification number: G06F21/83 ,  G06F21/31 ,  G06F21/74

Abstract: Example computing devices that are enabled to enter secure operating modes are provided. An example computing device includes a main processor to run an operating system enabled to establish communication from an external device to the main processor via a hardware interrupt handler when the external device is connected to the computing device. The computing device further includes a keyboard controller to detect a lock keystroke sequence at a keyboard, and, in response to detecting the lock keystroke sequence, cause the main processor to halt the operating system and to enter a secure operating mode in which communication from the external device to the main processor via the hardware interrupt handler is blocked.

公开(公告)号：US11948008B2

公开(公告)日：2024-04-02

申请号：US17293015

申请日：2019-04-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Mason Gunyuzlu ,  Valiuddin Ali ,  Robert Craig ,  Tevin Richards ,  Richard Bramley ,  Endrigo Nadin Pinheiro

IPC: G06F9/50

CPC classification number: G06F9/5016

Abstract: In an example, a system includes a firmware controller to initiate a SM execution mode of the system. The firmware controller scans memory for a process pool tag. The firmware controller compares the process pool tag to a set of operating system process pool tags and detects a coherency discrepancy between the process pool tag and the set of operating system process pool tags. The firmware controller exits the SM execution mode of the system.