http://tutacomm6oqwlbbpd246mljjxpupuxxqj2jg5mfdyegeaetdauigslad.onion/blog/iphone-security-essentials
The M-series of chips use what is known as a data memory-dependent pre-fetcher, which works a bit different than a classical pre-fetcher. This puppy might look cute, but when it is leaking your MacBook’s cryptographic keys it’s being a bad dog. Unfortunately, in their disclosure, the security researchers point out that : “The DMP then sees that the data value ‘looks like’ an address, and brings the data from this ‘address’ into the cache, which leaks the ‘address.’