On 02/07/2019 21:29, druck wrote:> Only some licencees high end server
class ARMv8A cores are 64 bit only,
> where there is no need of backwards compatibility. One of ARM's
> general purpose cores (A72) now only support 64 bit privileged modes,
> but 32 bit userland is still supported for running legacy code. The
> Pi 4's A72 supports both 32 and 64 bit OSs and userlands.

Correction; that should be the A76, which has 64 bit only privileged modes.

---druck

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