Data cache zero指令 cache lockdown 一个cache lock 可保证cache 中的内容一直被保留 System level caches 不是体系结构定义的cache,不受体系结构定义的维护指令管理,主要包括三类: 位于PoC之前的系统级caches,不受cache维护指令管理; 位于PoC之前的系统级caches,受按地址操作的cache维护指令管理, 不受按set/way操作...
These might be wired into a write- once register to facilitate lockdown. 5.5.6 Assisted architecture At each step in the boot chain, each stage must verify the next. If the Trusted Boot Firmware is encrypted, a decryption step is also required. Verification of a...
Code at EL3 cannot take an exception to a higher Exception level, so cannot change Execution state, except by going through a reset. When the processor moves from a higher to a lower Exception level, the Execution state can stay the same, or it can switch from AArch64 to AArch32. When...