Order of Six Angles Operation Triangulation: What You Get When Attack iPhones of Researchers https://media.ccc.de/v/37c3-11859-operation_triangulation_what_you_get_when_attack_iphones_of_researchers#t=1965

X (formerly Twitter) Boris Larin (@oct0xor) on X Thanks to marcan (https://t.co/sDwlE7Wq6T) and @zhuowei (https://t.co/EzBvk4cNBY) now we know the original purpose for this unknown hardware feature. Its MMIO debug registers for GPU L2 cache. I am really excited that we are very close to solving this mystery!