公开(公告)号：US11481248B2

公开(公告)日：2022-10-25

申请号：US16985977

申请日：2020-08-05

Applicant: Dell Products L.P.

Inventor： Balasingh P. Samuel ,  Richard M. Tonry ,  Nicholas D. Grobelny

IPC: G06F9/48 ,  G06F9/54

Abstract: An SMI task to be completed across multiple SMI events. An OS agent can be employed to determine a current load on a computing device. Based on the load, the OS agent can create an SMI message that specifies a maximum duration for an SMI event and that segments the SMI data for the SMI task. The OS agent can provide the SMI message to BIOS as part of requesting that the SMI task be performed. During the resulting SMI event, the BIOS can reassemble the segmented SMI data and then perform the SMI task. If this processing cannot be completed within the specified maximum duration for an SMI event, the BIOS can pause its processing and cause a subsequent SMI event to occur during which the processing can be resumed. In this way, the SMI task can be completed across multiple SMI events while ensuring that no single SMI event exceeds the specified maximum duration.

公开(公告)号：US20220278837A1

公开(公告)日：2022-09-01

申请号：US17747160

申请日：2022-05-18

Applicant: DELL PRODUCTS L.P.

Inventor： Nicholas D. Grobelny ,  Richard M. Tonry ,  Balasingh P. Samuel

IPC: H04L9/08 ,  H04L9/06

Abstract: A system includes a communication channel monitor configured to calculate a hash value of a first encrypted code segment based on a measurement. A security module may derive a first encryption key using a key decryption function operation from the hash value of the first encrypted code segment. A processor decrypts the first encrypted code segment with a seed key retrieved from a storage device, and if the decryption is successful then executes the first decrypted code segment. The processor may retrieve a second one of the encrypted code segments, wherein the second encrypted code segment is a next encrypted code segment for execution after the first encrypted code segment according to a sequence of execution, decrypt the second encrypted code segment with the first encryption key, and if the decryption is successful then execute the second decrypted code segment.

公开(公告)号：US11409541B2

公开(公告)日：2022-08-09

申请号：US16793361

申请日：2020-02-18

Applicant: Dell Products L.P.

Inventor： Balasingh P. Samuel ,  Ibrahim Sayyed ,  Sumanth Vidyadhara

IPC: G06F9/4401 ,  G06F13/36 ,  G06F21/57 ,  H04L9/32 ,  H04L9/30

Abstract: An information handling system may include a processor, non-transitory computer readable media communicatively coupled to the processor and having stored thereon a primary operating system of the information handling system and a secondary operating system of the information handling system, and a basic input/output system communicatively coupled to the processor and having provisioned thereon a signed signature of the secondary operating system signed with a private key of a public-private key pair and a public key of the public-private key pair. The basic input/output system is configured to, responsive to a determination to boot to the secondary operating system in lieu of booting to the primary operating system of the information handling system verify the secondary operating system using the signed signature of the secondary operating system and the public key and responsive to verifying the secondary operating system, allow the information handling system to boot to the secondary operating system.