Virtualized I/O Device Integration in SoC via Communication Unit
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Solution Overview
Problem
In multi-processor computing systems, integrating a virtualized device into a System-on-a-Chip (SoC) increases area, power consumption, and test complexity due to the need for dedicated hardware to manage shared hardware resources among multiple threads and Guest Operating Systems.
Innovation Solution
A communication unit is used to detect access requests from processors and send instructions to devices via different communication protocols, allowing for the integration of virtualized devices into SoCs while minimizing area and power impact by using a communication unit with multiple ports and protocols to manage shared hardware resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dedicated hardware is added to manage shared hardware resources among multiple threads and Guest Operating Systems, then device control capability is improved, but area, power consumption, and test complexity increase
Solution Approach 1:
The communication unit is designed with multi-functionality to handle multiple communication protocols (PCI, PCI-X, PCI Express, CXL) and manage shared hardware resources for multiple threads and Guest Operating Systems simultaneously. This universal design allows a single communication unit to perform what would traditionally require multiple dedicated hardware components, thereby improving device control capability while minimizing increases in area and power consumption.
2Adaptability or versatility
If dedicated hardware is added to manage shared hardware resources among multiple threads and Guest Operating Systems, then device control capability is improved, but test complexity increases
Solution Approach 1:
The communication unit's universal design that supports multiple communication protocols and management functions simultaneously reduces the number of separate hardware components needed, thereby reducing overall test complexity despite the enhanced device control capability.
3Productivity
If multiple communication protocols are supported in a single communication unit, then hardware resource sharing efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple communication protocol handlers (PCI, PCI-X, PCI Express, CXL) are merged into a single communication unit. This consolidation allows the system to support multiple protocols and efficiently share hardware resources among multiple threads and Guest Operating Systems while avoiding the need for separate dedicated hardware for each protocol, thereby improving hardware resource sharing efficiency while minimizing increases in device complexity.
Data Source
AI summary
A system that allows access to a virtualized device is disclosed. The system may include a device, a processor, and a communication unit coupled to the device via a communication link. The device may include hardware resources configured to be shared by multiple threads executing on the processor. The communication unit may be configured to detect a request to access the device by the processor. In response to the detection of the request, the communication unit may send one or more instructions to the device via the communication link using a communication protocol.