On Tue, Oct 10, 2017 at 10:37:51PM -0700, Radha Mohan Chintakuntla wrote:

From: Radha Mohan Chintakuntla <redacted>

This patch adds support for Cavium's fifth generation SATA controller.
It is an on-chip controller and complies with AHCI 1.3.1. As the
controller uses 64-bit addresses it cannot use the standard AHCI BAR5
and so uses BAR4.

Looks like it isn't actually AHCI 1.3.1 compliant after all then :)