Dell Products Inc.

Pablo Rafael Arias

Timothy Michael Lambert

Elie Antoun Jreij

Rama Rao Bisa

Shawn Joel Dube

Jeffrey Leighton Kennedy

Eugene David Cho

Kala Sampathkumar

Choudary Maddukuri

Ajeesh Kumar

Arun Muthaiyan

Chandrasekhar Puthillathe

Rajeshkumar Ichchhubhai Patel

Jun Gu

An information handling system may include a host system comprising a host system processor and a management controller communicatively coupled to the host system processor and comprising a main processor for implementing functionality of the management controller and a co-processor communicatively coupled to the host system processor and configured to implement a proxy to the host system to enable the host system to access devices managed by the management controller.

Systems and methods for management controller co-processor host to variable subsystem proxy

An information handling system may include a host system comprising a host system processor and a management controller communicatively coupled to the host system processor and configured to perform out-of-band management of a plurality of devices of the information handling system, and further configured to, during a powering on of the host system randomly select a subset of one or more devices of the plurality of devices for partial validation of firmware of the plurality of devices, randomly select a plurality of offsets associated with the one or more devices for partial verification of the firmware, and perform verification of the one or more devices at the plurality of offsets.

Systems and methods for providing secured boot and scan for devices with limited access

An information handling system includes an air mover and a thermal manager. The thermal manager identifies an air mover identification event for the air mover; in response to identifying the air mover identification event: places the air mover in a type identification state, and while the air mover is in the type identification state, identifies a type of the air mover; and, after identifying the type of the air mover, places the air mover in an active state based on the type of the air mover.

System and method for air mover identification

Embodiments provide methods and systems for detecting rogue endpoints on a device management bus. A communications controller configured as a bus owner initiates discovery of managed devices coupled to the bus and generate a unique identifier for each managed device. The communications controller transmits a bus configuration message to the managed devices, including the respective unique identifiers. The managed devices are configured as bus endpoints based on the bus configuration message. The managed devices also capture the bus address of the communications controller from the received bus configuration message. Messages received by a managed device are authenticated as originating from the communications controller if the messages include the unique identifier provided to that managed device. The messages may be further authenticated by comparing the bus address of the message sender against the captured bus address of the communications controller.

System and method for detecting rogue devices on a device management bus

An information handling system includes a host processing complex with a memory, and a baseboard management controller (BMC) with a processor and a video capture and difference engine (VCDE). The processor receives a memory compare command. The memory compare command includes a first pointer to a first block of the memory, a second pointer to a second block of the memory, and a memory block size. The processor further determines whether the memory block size is greater than a threshold, and forwards the memory compare command to the VCDE when the memory block size is greater than the threshold. The VCDE compares contents of the first block to contents of the second block in response to receiving the memory compare command.

Apparatus and method for fast memory validation in a baseboard management controller

An apparatus executes a boot operation, and determines a planar type associated with a motherboard. The apparatus queries an electronic database for the planar type associated with the motherboard, and identifies a branding identity that is electronically associated with the planar type.

Apparatus and method for dynamic modification of machine branding of information handling systems based on hardware inventory

Sideband device management bus messages are filtered using software operations in order to minimize dropped messages and to maintain the bus in an operable state. Redundant sideband device management buses are utilized in order to provide fail-over transmission of messages in scenarios where one of the buses becomes inoperable. Multi-packet messages are transmitted to managed devices via the sideband bus connections. If an inoperable state is detected in a sideband bus connection during transmission of a multi-packet message, the portion of the multi-packet message not received by the managed device is transmitted via a redundant sideband bus connection with the managed device. Software filtering of bus transactions utilizes a circular DMA buffer for storing all incoming transactions. Transactions of interest are copied to buffers associated with specific endpoints for processing.

Software filtering of redundant sideband device management bus communications

A baseboard management controller (BMC) includes a plurality of device I2C interfaces. Each device I2C interfaces provides a device I2C bus that is ported externally to the BMC. The BMC further includes a plurality of device buffer/switch circuits. Each device buffer/switch circuit is connected to a respective device I2C bus, and is configured to selectably connect to the respective I2C bus in a high-impedance mode, an open-drain mode, and a FET switch mode. The BMC further includes a multiplexor/driver circuit that has a multiplexor I2C interface that provides a multiplexor I2C bus that is ported externally to the BMC. The multiplexor/driver circuit is coupled to each device I2C bus via the respective buffer/switch circuit, and is configured to selectively couple one of the device I2C busses to the multiplexor I2C bus, and to select one of the high-impedance mode, the open-drain mode, or the FET switch mode for the selected buffer/switch circuit.

Apparatus and method to provide a multi-segment I2C bus exerciser/analyzer/fault injector and debug port system

In accordance with embodiments of the present disclosure, an information handling system may include a processor and an access controller communicatively coupled to the processor. The access controller may be configured to, when locally coupled to a second information handling system determine if the second information handling system is authorized to perform virtual crash cart operations on the information handling system and, responsive to determining that the second information handling system is authorized to perform virtual crash cart operations on the information handling system, permit the second information handling system to perform virtual crash cart operations on the information handling system whereby the second information handling system implements one or more virtual information handling resources such that each virtual information handling resource behaves at least in part as a physical information handling resource present at the information handling system.

Systems and methods for providing virtual crash cart access to an information handling system

In accordance with embodiments of the present disclosure, an information handling system may include a processor, an input/output port communicatively coupled to the processor, and an access controller communicatively coupled to the processor. The an input/output port may be configured to receive an external input/output device and communicatively couple such input/output device to one or more information handling resources of the information handling system. The access controller may be configured to responsive to an attempted management operation at the information handling system, determine if an input/output device coupled to the input/output port is authenticated as a trusted input/output device. The access controller may also be configured to, responsive to determining that the input/output device is authenticated as a trusted input/output device, allow execution of the attempted management operation.

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Austin, TX, United States of America

Pablo Rafael Arias