MEMORY TYPE WHICH IS CACHEABLE YET INACCESSIBLE BY SPECULATIVE INSTRUCTIONS

An improved architectural means to address processor cache attacks based on speculative execution defines a new memory type that is both cacheable and inaccessible by speculation. Speculative execution cannot access and expose a memory location that is speculatively inaccessible. Such mechanisms can disqualify certain sensitive data from being exposed through speculative execution. Data which mustbe protected at a performance cost may be specifically marked. If the processor is told where secrets are stored in memory and is forbidden from speculating on those memory locations, then the processor will ensure the process trying to access those memory locations is privileged to access those locations before reading and caching them. Such countermeasure is effective against attacks that use speculative execution to leak secrets from a processor cache. 一种改进的架构方法，用于基于推测执行处理处理器缓存攻击，其定义了一种新的内存类型，其既是可缓存的又是不可推测访问的。推测执行不能够访问和暴露不可推测地访问的内存位置。这样的机制能够防止特定的敏感数据通过推测执行而被暴露。必须以性能为代价来保护的数据可以被特别标记。如果处理器被告知秘密被存储在内存的哪个位置并被阻止在那些内存位置