Ati Technologies Ulc

Advanced Micro Devices Corporation

Kamraan Nasim

Erez Koelewyn

Yinan Jiang

Randall Brown

Ahmed M Abdelkhalek

Andy Sung

Wentao Xu

Dezhi Ming

Shijie Che

Vaibhav Amarayya Hiremath

Dmytro Chenchykov

Shadi Dashmiz

A system and method for efficiently measuring on-die power supply voltage are described. In various implementations, an integrated circuit includes at least one or more processors and on-chip memory. The on-chip memory has a higher security level than off-chip memory. One of the one or more processors is designated as a security processor. During the processing of the multiple boot steps of a bootup operation, the security processor initializes a message queue in on-chip memory. The security processor also loads multiple modules from off-chip memory into the on-chip memory. The processor executes the multiple loaded modules in an order based on using the message queue to implement inter-module communication among the plurality of boot modules. The security processor transfers requested data between modules using messages from the modules and data storage of the message queue. The modules are completed without reloading any modules from off-chip memory.

Multiple module bootup operation

Techniques described herein provide users with the ability to persistently adjust settings for boot-time features (BTF) of a computing device. A user requests a particular BTF configuration adjustment for a device via a device driver. The driver instructs trusted firmware of the device to store a boot override record in persistent storage accessible by a bootloader for the device. Upon implementation of the boot sequence for the device, the bootloader applies the changes reflected in the record to BTF configuration data. The boot override information is persistently available to the bootloader, which ensures that the configuration changes that the boot override record(s) represent are applied to the BTFs of the device until the boot override record(s) are cleared or invalidated. Further, to ensure the security of boot override record(s), the trusted firmware generates, for each record, an HMAC tag using an HMAC key derived from a Chip Endorsement Fused Secret from the hardware.

Dynamic boot configuration

A technique for managing access to a micro engine, the method comprising: determining that a virtual function 'VF') is to be given access to direct communication with a micro engine; in response to the determining, configuring the micro engine to accept direct communication from the VF; monitoring for unpermitted communication; and after a time period has expired, configuring the micro engine to no longer accept direct communication from the VF.

Security for microengine access

In a system with a master processor and slave processors, sync points are used in boot instructions. While executing the boot instructions, the slave processor determines whether the sync point is enabled. In response to determining the sync point is enabled, the slave processor pauses execution of the boot instructions, waits for commands from the master processor, receives commands from the master processor, executes the received commands until a release command is received, and then continues to execute boot instructions. In response to determining the sync point is not enabled, the slave processor continues to execute boot instructions.

Sync point mechanism between master and slave nodes

Growing community of inventors

Woodbridge, Canada

Kamraan Nasim