Intel Corporation

Other

Yoav Hochberg

Glen J Anderson

Brian David Johnson

Charles C Smith

Guy Ben Haim

David G Carson

P K Nizar

David Finzi

Adi Golbert

Charles Smith

Brian Johnson

An embodiment of the invention includes determining a first security status for first information and a second security status for second information, the second security status being more secure than the first security status; establishing a first communication path between the system and a first local computing node via a first wireless path; conveying the first information to the first local computing node via the first wireless path based on the first security status; and withholding the second information from the first local computing node based on the second security status; wherein the first and second information are stored on at least one of the system and a remotely located computing node. Other embodiments are described herein.

Secure data sharing with publicly accessible computing nodes

A multiprocessor programmable interrupt controller (MPIC) system has an interrupt bus, distinct from the system (memory) bus, for handling interrupt-related messages. I/O device interrupt lines are connected to one or more interrupt delivery units (IDUs) that are each coupled to the interrupt bus for broadcasting of I/O-generated interrupt request messages. Each processor chip has an on-board interrupt acceptance unit (IAU) that can accept interrupt requests from the interrupt bus and can broadcast on the interrupt bus interrupt request messages generated by its associated processor. Each processor can request to read the contents of the IAU control registers that are associated with another target processor. In that case, a remote read request message is generated by the IAU of the local processor and responded to, without software intervention, by the IAU of the target processor. A remote read status field indicates to the local processor the status of the data contained in a remote read register. The remote IAU is expected to respond in a fixed number of interrupt bus cycles. If the remote agent is unable to do so, then the remote read status field becomes 'Invalid.' If successful, the remote read status resolves to 'Valid.' The processor polls this field to determine the completion and success of the remote read request. Remote read requests are always successful (although the data may be valid or invalid) in that they are never retried. Remote read requests are primarily a debug feature, and a 'hung' remote IAU that is unable to respond to a remote read request should not cause the debugging software to hang on the local processor.

Multiprocessor interrupt controller with remote reading of interrupt

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Haifa, Israel

Yoav Hochberg