Cargo Features

[dependencies]
aarch64-arch-helpers = { version = "0.2.1", default-features = false, features = ["errata_a57_813419", "cache_helpers", "mmu_helpers"] }
default = cache_helpers, mmu_helpers

These default features are set whenever aarch64-arch-helpers is added without default-features = false somewhere in the dependency tree.

errata_a57_813419
cache_helpers default
mmu_helpers default

aarch64-arch-helpers has 4 features without comments.