Heterogeneous Instruction Set Exception Handling via Translation
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Solution Overview
Problem
In a virtualization scenario, when a virtual machine supporting a heterogeneous instruction set architecture runs on a physical host with a different instruction set architecture, exceptions or interrupts cannot be properly identified or processed, leading to system crashes, as the virtualization platform can only recognize exceptions or interrupts triggered in its own instruction set architecture.
Innovation Solution
A method is implemented on a physical host supporting a heterogeneous instruction set virtual machine, where a processor with both primary and secondary processor cores executes instructions without translation, using an exception or interrupt mapping relationship to translate and identify the type of exception or interrupt triggered by the secondary architecture virtual machine, allowing proper handling and preventing system crashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a virtualization platform supports only one instruction set architecture, then the platform can properly identify and process exceptions or interrupts, but it cannot run virtual machines with heterogeneous instruction set architectures
Solution Approach 1:
The patent introduces an instruction translation mechanism that translates instructions from a secondary instruction set architecture into a primary instruction set architecture. This translation layer acts as an intermediary, allowing the virtualization platform to execute heterogeneous instruction sets while maintaining the original exception handling capabilities of the primary architecture. The translation mechanism preserves the instruction semantics and maps exceptions to equivalent handlers in the primary architecture.
Solution Approach 2:
The patent changes the parameter representation of instructions by translating them from one instruction set architecture format to another. The translation mechanism converts opcode formats, register mappings, and instruction encoding schemes from the secondary architecture to match the primary architecture, enabling compatibility while maintaining functional equivalence for exception handling.
2Adaptability or versatility
If the virtualization platform translates instructions from secondary architecture to primary architecture, then heterogeneous instruction set virtual machines can run, but the complexity of the system increases
Solution Approach 1:
The patent segments the instruction translation process into distinct stages: instruction fetch, decoding, translation, and execution. The translation mechanism is divided into modular components that handle different instruction types separately, making the complex translation process more manageable and maintainable while enabling support for multiple instruction set architectures.
3Productivity
If hardware devices are replaced to support different instruction set architectures, then virtual machines can run natively, but the cost and downtime increase
Solution Approach 1:
The patent creates a software-based copy of the instruction set architecture through the translation mechanism. Instead of physically replacing hardware devices to support different instruction sets, the system creates a virtual copy of the required architecture through instruction translation, allowing heterogeneous virtual machines to run without hardware changes and eliminating replacement downtime.
Data Source
AI summary
A method for handling an exception or interrupt in a heterogeneous instruction set architecture is provided. A physical host to which the method is applied can support two instruction set architectures. When a secondary architecture virtual machine triggers an exception or interrupt, a virtual machine monitor may translate code of the exception or interrupt in a secondary instruction set architecture into code of the exception or interrupt in a primary instruction set architecture. The virtual machine monitor) may identify the code of the exception or interrupt in the primary instruction set architecture. The virtual machine monitor identifies, based on the translated code, a type of the exception or interrupt triggered by the secondary architecture virtual machine, to handle the exception or interrupt.