公开(公告)号：US20250077675A1

公开(公告)日：2025-03-06

申请号：US17923390

申请日：2020-06-24

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

Inventor： CHRISTOPHER H STEWART ,  BARANEEDHARAN ANBAZHAGAN

IPC: G06F21/57 ,  G06F21/64

Abstract: An example apparatus may include a hardware component, a memory, and a processor. The processor may retrieve a firmware for the hardware component subsequent to the firmware being loaded on the hardware component. The processor may determine that a firmware signature associated with the firmware is stored in the memory. In some examples, in response to a determination that the firmware signature associated with the firmware is stored in the memory, the processor may initiate authentication of the firmware.

公开(公告)号：US20170185429A1

公开(公告)日：2017-06-29

申请号：US15309486

申请日：2014-07-22

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

Inventor： JEFFREY JEANSONNE ,  VALIUDDIN ALI ,  LAN WANG ,  BARANEEDHARAN ANBAZHAGAN ,  PATRICK L GIBBONS

IPC: G06F9/445 ,  H04L9/32 ,  H04L9/06 ,  G06F21/44

CPC classification number: G06F9/44505 ,  G06F11/1417 ,  G06F21/44 ,  G06F21/572 ,  G06F21/575 ,  G06F21/6218 ,  G06F21/79 ,  G06F2221/2141 ,  H04L9/0643 ,  H04L9/3242

Abstract: Examples herein disclose receiving a basic input output system (BIOS) policy change and authorizing the BIOS policy change. Upon the authorization of the BIOS policy change, a first copy of the BIOS policy is stored in a first memory accessible by a central processing unit. Additionally, a second copy of the BIOS policy change is transmitted for storage in a second memory electrically isolated from the central processing unit.

公开(公告)号：US20160140038A1

公开(公告)日：2016-05-19

申请号：US14892220

申请日：2013-07-31

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

Inventor： BARANEEDHARAN ANBAZHAGAN ,  PATRICK L. GIBBONS ,  CHRISTOPHER H STEWART

IPC: G06F12/06 ,  G06F9/445 ,  G06F21/57

CPC classification number: G06F12/0653 ,  G06F8/65 ,  G06F8/658 ,  G06F9/4401 ,  G06F11/1417 ,  G06F21/575 ,  G06F2212/1008 ,  G06F2221/033

Abstract: A second physical-address-dependent code is generated from a first physical-address-dependent code using differential data, where the generating comprises converting a first physical address in a region of the first physical-address-dependent code to a second, different physical address for inclusion in a corresponding region of the second physical-address-dependent code.

Abstract translation: 使用差分数据从与第一物理地址相关的代码生成第二物理地址相关代码，其中生成包括将第一物理地址相关代码的区域中的第一物理地址转换为第二物理地址相关代码的第二物理地址相关代码 地址以包括在第二物理地址相关代码的相应区域中。

公开(公告)号：US20230393993A1

公开(公告)日：2023-12-07

申请号：US17830730

申请日：2022-06-02

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

Inventor： RICHARD A BRAMLEY ,  BARANEEDHARAN ANBAZHAGAN ,  VALIUDDIN ALI

IPC: G06F12/14 ,  G06F12/02

CPC classification number: G06F12/1416 ,  G06F2212/7207 ,  G06F2212/1052 ,  G06F12/0246

Abstract: An example non-transitory computer readable storage medium comprising instructions that when executed cause a processor of a computing device to: in response to a trigger of a system management mode (SMM), verify all processor threads have been pulled into the SMM; in response to a successful verification, enable write access to a non-volatile memory of the computing device via two registers, where the writing access is disabled upon booting of the computing device; and upon exiting the SMM, disable the write access via the two registers.

公开(公告)号：US20160085558A1

公开(公告)日：2016-03-24

申请号：US14892223

申请日：2013-07-31

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

Inventor： BARANEEDHARAN ANBAZHAGAN ,  CHRISTOPHER H STEWART

IPC: G06F9/44 ,  G06F12/14 ,  G06F9/445

CPC classification number: G06F9/4401 ,  G06F8/654 ,  G06F12/1458 ,  G06F21/572 ,  G06F2212/1052

Abstract: It is determined whether an updated first boot phase code is present. The updated first boot phase code is validated. In response to the validating, a current version of the first boot phase code is updated using the updated first boot phase code.

Abstract translation: 确定是否存在更新的第一引导阶段代码。 更新的第一个引导阶段代码被验证。 响应于验证，使用更新的第一引导阶段代码更新当前版本的第一引导阶段代码。