公开(公告)号：US20200320030A1

公开(公告)日：2020-10-08

申请号：US16482445

申请日：2017-12-08

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

Inventor： Monji G JABORI ,  Wei Ze LIU

IPC: G06F13/364 ,  G06F13/16 ,  G06F13/40 ,  G06F21/85 ,  G06F1/3215

Abstract: In some examples, a system includes a memory resource, a communication channel to allow a bus mastering capable device to access the memory resource, and a controller to block the system from responding to a request from the bus mastering capable device for accessing the memory resource until the controller has authorized the bus mastering capable device.

公开(公告)号：US20180225126A1

公开(公告)日：2018-08-09

申请号：US15749106

申请日：2016-01-14

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

Inventor： Wei Ze LIU ,  Rosilet Retnamoni BRADUKE ,  Rajesh A. SHAH ,  Lan WANG

IPC: G06F9/4401 ,  G06F11/14

CPC classification number: G06F9/4403 ,  G06F9/4401 ,  G06F11/14 ,  G06F11/1417 ,  G06F11/2284 ,  G06F11/3013 ,  G06F11/3072 ,  G06F2201/86

Abstract: In some examples, an embedded controller in a system monitors a basic input/output system (BIOS) policy stored in a non-volatile storage, and executes a management action with respect to the BIOS policy, where the monitoring and the executing are performed by the embedded controller independent of instructions executed by a processor in the system.

公开(公告)号：US20180321947A1

公开(公告)日：2018-11-08

申请号：US15749468

申请日：2016-01-25

Applicant: Hewlett-Packard Development Company, L.P

Inventor： Wei Ze LIU ,  Jeffrey Kevin JEANSONNE ,  Dallas M BARLOW

IPC: G06F9/4401 ,  G06F21/57

CPC classification number: G06F9/4401 ,  G06F21/52 ,  G06F21/554 ,  G06F21/572 ,  G06F21/575 ,  G06F2221/2101 ,  G06F2221/2151

Abstract: A method of protecting basic input/output system (BIOS) code. The method includes, with a relocation information tool executed by a processor, refactoring a number of data sections within a number of handlers of the BIOS code to tag a number of variables within the handlers. The tags indicate which of the variables should be protected at runtime. The method further includes generating a relocation file comprising a number of relocation addresses identifying locations of a number of dynamic variables that change at runtime. The relocation addresses point to a location within the handlers different from an original location. The method further includes, with a loader, loading at runtime the relocation file as part of a BIOS firmware image and adjusting data access to the dynamic variables in handler code to identify the location of the dynamic variables based on the relocation file.