PIM Device Process Isolation Through Exclusive Ownership Locking

The patent segments PIM access rights by introducing process-specific aperture base registers and aperture limit registers. Each process is assigned a unique address space segment defined by these registers, allowing concurrent access to different portions of PIM resources without interference. This segmentation enables multiple processes to safely access PIM simultaneously while maintaining functional correctness through isolated address spaces.

The patent implements security segmentation through process-specific aperture registers that create isolated address spaces for each process. This segmentation prevents side channel attacks by ensuring that process A cannot infer or access information from process B's PIM operations, as each process operates within its own defined address boundaries. Concurrent access remains productive while security is maintained through this spatial isolation.

The patent implements universal aperture control structures that serve multiple functions: process identification, address space isolation, and concurrent access coordination. The process ID field in aperture base registers and the aperture limit registers work together as a multi-functional control mechanism that enables address space isolation without requiring separate complex control structures for each process. This universal approach reduces overall device complexity while maintaining reliable isolation.