Virtualizable advanced synchronization facility

摘要

A system and method for executing a transaction in a transactional memory system is disclosed. The system includes a processor of a plurality of processors coupled to shared memory, wherein the processor is configured to execute a section of code, including a plurality of memory access operations to the shared memory, as an atomic transaction relative to the execution of the plurality of processors. According to embodiments, the processor is configured to determine whether the memory access operations include any of a set of disallowed instructions, wherein the set includes one or more instructions that operate differently in a virtualized computing environment than in a native computing environment. If any of the memory access operations are ones of the disallowed instructions, then the processor aborts the transaction.

主权项

1. An apparatus, comprising:
a processor coupleable to a shared memory that is shared by one or more other processors, wherein the processor is operating in a virtual machine mode and is configured to execute a section of code that includes a plurality of memory access operations to the shared memory as an atomic transaction relative to the one or more other processors; and wherein the processor is configured to abort the transaction in response to identifying that at least one of the plurality of memory access operations includes a disallowed instruction, the disallowed instruction of a type that is executed in the virtual machine mode and a native computing environment and that has a different operation during execution in the virtual machine mode than during execution of the disallowed instruction in the native computing environment.