Editorial question41.8K views4,899 votes0 answers3,001 following
AI-generatedMMU ↔ PAN: Does PAN alone prevent accidental public access to user memory?
MMU ↔ PAN Integration In AArch64, the MMU enforces address‑space separation via page tables, while the Privileged Access Never (PAN) bit in the PSTATE_EL1 register aims to block kernel accidental reads of user‑space memory. PAN is only present on ARMv8.1‑A and newer cores, and its effectiveness depends on correct configuration of the PXN bits in each page ta